Greenhouse ventilation fans help remove hot, humid air, but the right choice depends on greenhouse size, airflow needs, and whether you need exhaust or air circulation. I rank the Amico 12-inch shutter fan as the best overall for its stated 1,282 CFM, eight-speed control, and thermostat. For larger spaces, the Cammoo 20-inch fan offers temperature, humidity, and speed controls, while the iLIVING 12-inch is a simpler wall-mounted alternative. The main tradeoffs are capacity versus noise and power use, automatic controls versus setup simplicity, and exhaust ventilation versus gentle circulation. Read on for the full comparison, selection criteria, and advice for matching a fan to your greenhouse.
Complete the kit
Key Takeaways
The Amico 12-inch pairs a stated 1,282 CFM with eight speeds and a thermostat, giving it a more adjustable control set than the basic shutter-fan options.
The Cammoo 20-inch is the standout for buyers seeking temperature, humidity, and speed control in one exhaust fan, though its 4,000 CFM rating calls for careful sizing.
Shutter exhaust fans dominate this lineup for whole-space air exchange; clip-on AeroWave and grow-tent fans are better treated as circulation helpers, not substitutes for exhaust.
Fan diameter alone does not settle capacity. Listed airflow ranges from 760 CFM for the 8-inch chicken-coop model to 4,000 CFM for the Cammoo, so compare ratings and installation needs together.
Remote controls, thermostats, and variable speed can reduce hands-on adjustment, but buyers should check the control method and sensor needs rather than paying for features they will not use.
| greenhouse ventilation fan | Power | Noise level | Mounting | Airflow |
|---|---|---|---|---|
| 8 Inch Shutter Exhaust Fan for | 26 watts | 40 dB | Wall, ceiling, or window | 760 CFM |
| iLIVING 20-Inch Wall Mounted S | 115V, 2.2A; 253 watts | — | — | Up to 3368 CFM |
| Amico 12" Shutter Exhaust Fan | — | 50 dB | — | 1282 CFM |
| iLIVING 18" Wall Mounted Shutt | 115V, 0.85A; 97 watts | — | — | 1736 CFM |
| VEVOR 10” Shutter Exhaust Fan | 45W | 50 dB | Wall mount | 820 CFM |
| 8-inch Upgraded Shutter Exhaus | 26 watts; 120 volts AC | 40 dB | Wall mount; listed installation options also include ceiling and window | — |
| VIVOSUN AeroWave E6 Gen2 Grow | 12 watts; 12 volts | 33 dB | Clip mount | — |
| iLiving 12" Wall Mounted Shutt | 65 watts; 115 volts, 0.6 A | Under 65 dB | Wall mount | — |
| VIVOSUN AeroWave D4 Grow Tent | USB; 5 volts | 35 dB | Clip-on; listing also describes magnetic, suspended, and surface placement | — |
| Grow Tent Fan | 6 watts; AC/DC | 45 dB | Clip clamp | — |
| VEVOR 16 Inch Wall Mounted Shu | 77 W | 65 dB | Wall mount | 2,438 CFM |
| Cammoo 20 Inch Exhaust Fan wit | 70 W | — | Wall mount | 4,000 CFM |
| Grow Tent Fan 2 Pack | 5 W | 40 dB | Clip/clamp | 520 CFM |
| 10-inch Upgraded Shutter Exhau | 36 W | — | Wall, ceiling, or window | 890 CFM |
| VEVOR 12 in Shutter Exhaust Fa | 58 W | 60 dB | — | 1,347 CFM |
More Details on Our Top Picks
8 Inch Shutter Exhaust Fan for Chicken Coop 760 CFM Plug & Play
This compact pick suits a greenhouse that needs exhaust without the footprint or airflow of a large commercial fan. Its 760 CFM capacity is lower than the VEVOR 10-inch fan’s 820 CFM, but the 8-inch size and plug-and-play setup make it a practical match for smaller spaces or targeted ventilation. Automatic shutters help block rain, insects, and dust when the fan is off, while galvanized steel housing is a sensible choice for damp, exposed settings. The tradeoff is limited control: unlike the thermostat-equipped Amico 12-inch, this model lists push-button control and no automatic temperature response. Its 40 dB noise rating may also be audible in a quiet greenhouse. I’d choose it for straightforward airflow, not hands-off climate management.
Pros:- Compact 8-inch format fits smaller ventilation openings
- Automatic shutters help limit rain, insects, and dust when idle
- Plug-and-play design can simplify setup
- Galvanized steel housing is suited to demanding utility spaces
Cons:- 760 CFM is less airflow than the VEVOR 10-inch model and larger fans
- No thermostat or variable-speed control is listed
- 40 dB may be noticeable in a quiet growing space
Best for: Growers with a small greenhouse who want a compact, plug-in exhaust fan with shutters to keep pests and weather out when it is off.
Not ideal for: Owners of large greenhouses or anyone who wants automatic temperature-based operation; its airflow is lower than the larger models and it lacks a listed thermostat.
- Airflow:760 CFM
- Fan size:8 inches
- Motor:Brushless
- Power:26 watts
- Voltage:120 volts
- Noise level:40 dB
- Speeds:3
- Mounting:Wall, ceiling, or window
Our verdict“Choose this fan for simple, compact ventilation in a small greenhouse, but pick the Amico 12-inch if you want thermostat control.”
iLIVING 20-Inch Wall Mounted Shutter Exhaust Fan with Thermostat and Variable Speed Control
For a large greenhouse where moving substantial air matters more than a compact installation, this iLIVING model leads the group with 3368 CFM and a 20-inch blade. Its variable-speed and thermostat controls give growers more ways to respond to changing heat than the simpler VEVOR 10-inch, which has a single listed speed. Automatic shutters close when the fan is idle, and the thermally protected motor is a useful safeguard during extended operation. That capacity comes with real installation demands: at 26 pounds, it needs solid wall support, and its noise can reach below 69 dB rather than the lower stated levels of the 8-inch shutter fan or VEVOR 10-inch. I’d rank it for large spaces, not small structures where its output and mounting needs may be excessive.
Pros:- Highest listed airflow among these five models at 3368 CFM
- Thermostat and variable-speed controls allow adjustment to heat conditions
- Automatic shutters help close off the opening when idle
- Thermally protected motor and galvanized steel frame suit sustained use
Cons:- At 26 pounds, installation calls for sturdy wall support
- Noise rating is below 69 dB, higher than the smaller models’ stated levels
- Its size and airflow may be more than a small greenhouse needs
Best for: Greenhouse operators ventilating a large growing area who need high exhaust capacity and adjustable, thermostat-led operation.
Not ideal for: Small greenhouse owners, lightweight walls, or growers who prioritize quiet operation; this is a heavy 20-inch unit with substantial airflow and noise potential.
- Airflow:Up to 3368 CFM
- Blade diameter:20 inches
- Coverage area:5000 sq ft
- Power:115V, 2.2A; 253 watts
- Motor:Direct drive, 1/5 HP
- Speed:980 RPM
- Controls:Thermostat and variable speed
- Weight:26 pounds
Our verdict“Pick this iLIVING when a large greenhouse needs strong, adjustable exhaust and the structure can support a heavy wall-mounted fan.”
Amico 12″ Shutter Exhaust Fan with Thermostat, 1282 CFM, 8-Speed, 25W DC Motor
The Amico is the strongest fit here for growers who want moderate-to-high airflow with fine-grained control rather than simply choosing the biggest fan. It moves 1282 CFM and offers eight speeds, giving more adjustment than the 8-inch shutter fan’s three listed speeds and more steps than the VEVOR 10-inch’s single setting. Its 25W DC motor keeps listed power modest, while the thermostat can automate response to heat. The stated coverage reaches up to 1600 sq ft, though actual ventilation needs depend on greenhouse layout and conditions. Compared with the much larger iLIVING 20-inch, it gives up substantial airflow but is easier to place in a mid-size structure. Wall mounting is required, and its 50 dB rating is not the quietest listed, so placement matters.
Pros:- Eight speed settings allow more precise airflow adjustment than basic single-speed models
- Thermostat supports automatic operation as temperatures change
- 25W DC motor has low listed power consumption
- Weatherproof shutters and a three-year warranty are specified
Cons:- 1282 CFM falls well below the iLIVING 18-inch and 20-inch models
- Wall mounting may call for tools or professional help
- 50 dB may be noticeable near a quiet work or growing area
Best for: Growers with a medium-sized greenhouse who want thermostat automation, many speed settings, and a low-wattage motor.
Not ideal for: Owners of very large greenhouses who need the highest exhaust volume, or anyone unable to mount a fan securely through a wall.
- Airflow:1282 CFM
- Fan size:12 inches
- Listed room size:Up to 1600 sq ft
- Motor power:25W DC
- Speeds:8
- Voltage:120V
- Noise level:50 dB
- Warranty:3 years
Our verdict“Choose the Amico for a mid-size greenhouse where thermostat control and adjustable, low-wattage operation matter more than maximum airflow.”
iLIVING 18″ Wall Mounted Shutter Exhaust Fan with Thermostat and Variable Speed Controller
This 18-inch iLIVING occupies the useful middle ground between the Amico 12-inch and the much larger iLIVING 20-inch. Its 1736 CFM airflow and listed 2600 sq ft coverage target larger greenhouses, while thermostat and variable-speed controls offer more flexibility than the fixed-speed VEVOR 10-inch. The enclosed, permanently lubricated motor and galvanized steel frame with aluminum shutters and blades are aimed at regular duty, and UL and cUL listings add specific electrical certifications. It does not match the 20-inch iLIVING’s 3368 CFM, but the smaller blade and lower listed wattage make it a less imposing option for spaces that do not need that much exhaust. It still requires wall mounting, and its control combination may take more setup than a basic push-button fan.
Pros:- 1736 CFM provides more capacity than the Amico 12-inch and smaller fans
- Thermostat and variable-speed controls support adjustable ventilation
- Enclosed, permanently lubricated motor is designed for ongoing operation
- UL and cUL listed, with galvanized steel and aluminum construction
Cons:- Wall mounting requires a suitable opening and secure support
- Control options may be more involved than a basic push-button fan
- Airflow is substantially below the iLIVING 20-inch model
Best for: Growers with a medium-to-large greenhouse who need thermostat and variable-speed control without stepping up to a 20-inch fan.
Not ideal for: Small structures, people seeking a plug-in portable option, or buyers who need the maximum airflow available in this group.
- Airflow:1736 CFM
- Blade diameter:18 inches
- Coverage area:2600 sq ft
- Power:115V, 0.85A; 97 watts
- Motor:Enclosed, permanently lubricated
- Speed:1075 RPM
- Controls:Variable speed, thermostat, push button
- Certifications:UL and cUL listed
Our verdict“Choose this 18-inch iLIVING for a larger greenhouse that needs adjustable exhaust but not the 20-inch model’s maximum output.”
VEVOR 10” Shutter Exhaust Fan, High-Speed 820 CFM, Wall Mount Attic Fan with AC Motor for Greenhouses, Garages, Sheds, Shops
For growers who want a straightforward step up from an 8-inch fan, this VEVOR offers 820 CFM in a 10-inch wall-mounted format. That is a modest airflow increase over the 8-inch shutter fan, but it comes without the Amico’s thermostat or eight speed settings. The simpler design makes sense when a greenhouse needs a basic exhaust point and the operator is comfortable controlling ventilation manually. Its galvanized steel and aluminum construction, three-blade assembly, and stated 50 dB noise level suit utility use, while the 45W draw is higher than the Amico’s 25W DC motor. A key limitation is the listed lack of a speed control switch or plug, so buyers should check the intended electrical setup before choosing it. This is a practical fixed-speed option, not an automated climate-control system.
Pros:- 820 CFM provides slightly more listed airflow than the 8-inch shutter fan
- All-metal galvanized steel and aluminum construction
- Wall-mounted format suits a fixed greenhouse exhaust opening
- 50 dB noise rating is specified
Cons:- Single listed speed offers less adjustment than the Amico 12-inch
- No plug is included according to the product data
- 45W draw is higher than the Amico’s listed 25W motor
Best for: Growers who need a basic 10-inch exhaust fan for a small-to-medium greenhouse and prefer simple manual operation over automation.
Not ideal for: Buyers who need thermostat control, multiple speed settings, or a ready-to-use plug connection; those features are not listed for this model.
- Airflow:820 CFM
- Blade length:10 inches
- Dimensions:12.8 x 12.8 inches
- Voltage:120V
- Power:45W
- Speed:1650 RPM
- Noise level:50 dB
- Mounting:Wall mount
Our verdict“Choose this VEVOR for basic fixed-speed ventilation through a wall, but opt for the Amico if you want thermostat-led airflow control.”
8-inch Upgraded Shutter Exhaust Fan with Thermostat & Remote Control
For a greenhouse that needs heat vented outdoors, this wall-mounted shutter fan offers a simpler exhaust setup than the VIVOSUN AeroWave E6 Gen2, which circulates air inside a tent rather than exchanging it with the outdoors. Its 760 CFM airflow and thermostat control suit modest spaces where temperature-triggered operation can reduce the need for manual switching. A remote and three speed settings add control, while the listed 26-watt draw is modest for a powered exhaust fan. Compared with the larger iLiving 12-inch model, this 8-inch unit is a more restrained fit, but it also moves less air and gives less headroom for a large greenhouse or peak summer heat. It needs a suitable wall opening and mounting location, so it is not a clip-on solution for temporary structures.
Pros:- Thermostat control can automate exhaust when the greenhouse warms.
- 760 CFM provides more air exchange than small circulation clip fans.
- Remote control and three speeds allow adjustment without reaching the fan.
- Listed 26-watt power draw is modest for a wall-mounted exhaust model.
Cons:- May move more air than a very small greenhouse needs.
- Requires a wall, window, or ceiling mounting location and suitable opening.
- Provides less airflow capacity than the iLiving 12-inch exhaust fan.
Best for: Greenhouse owners with a suitable wall opening who want thermostat-controlled exhaust for a modest growing space.
Not ideal for: Growers ventilating a large greenhouse or seeking a portable fan, since its 760 CFM capacity is lower than the iLiving 12-inch and it requires wall mounting.
- Airflow capacity:760 CFM
- Mounting:Wall mount; listed installation options also include ceiling and window
- Thermostat:Automatic temperature control
- Controls:Button and remote control
- Speed settings:3
- Power:26 watts; 120 volts AC
- Noise level:40 dB
- Construction:Alloy steel and aluminum
Our verdict“Choose this for thermostat-managed exhaust in a modest greenhouse with a practical wall-mount location, not for large spaces or movable airflow.”
VIVOSUN AeroWave E6 Gen2 Grow Tent Oscillating Clip Fan, 6-inch, 1-Pack
This pick is for air movement within the growing space, not for exhausting hot air through a greenhouse wall. The E6 Gen2 pairs a clip mount and oscillating head with 10 speed levels and Wi-Fi control, making it easier to vary circulation around plants as their canopy fills in. At a listed 33 dB and 12 watts, it is a quieter, lower-power companion to exhaust models such as the iLiving 12-inch, but it cannot replace their outdoor air exchange. Its IP54 rating is useful in humid growing areas, though the product is still positioned for indoor grow environments and needs a nearby outlet. Compared with the two-fan VIVOSUN AeroWave D4 pack, this gives one larger fan with app control and oscillation rather than two separate points of airflow.
Pros:- Wi-Fi app control allows speed adjustment without reaching into the grow space.
- Ten speeds provide finer airflow adjustment than the three-speed AeroWave D4.
- Oscillation spreads air across a broader area than a fixed-direction fan.
- Listed 33 dB noise level and 12-watt draw suit quiet indoor growing.
Cons:- Does not provide outdoor air exchange or replace a shutter exhaust fan.
- Single-fan pack covers fewer positions than the two-fan AeroWave D4 set.
- Requires a power outlet and is described for indoor growing environments.
Best for: Indoor greenhouse and grow-tent gardeners who want app-adjustable, oscillating circulation around plants.
Not ideal for: Growers who need to remove hot, humid air from a greenhouse, since this clip fan recirculates indoor air rather than exhausting it.
- Airflow capacity:320 CFM
- Fan size:6 inches
- Speed settings:10
- Control:Wi-Fi app and button control
- Noise level:33 dB
- Power:12 watts; 12 volts
- Mounting:Clip mount
- Warranty:2 years
Our verdict“Pick the E6 Gen2 for quiet, app-controlled circulation in an indoor grow space, but pair it with an exhaust fan if heat must leave the greenhouse.”
iLiving 12″ Wall Mounted Shutter Exhaust Fan with Thermostat and Variable Speed Control
Among the exhaust options here, this iLiving makes the most sense when a greenhouse needs more capacity than the 8-inch, 760 CFM shutter fan. Its 960 CFM rating and stated coverage of up to 1,400 square feet make it better suited to larger growing areas, while the thermostat and variable speed control let growers tune ventilation rather than rely on one fixed output. Galvanized steel and aluminum construction are a practical fit for a fan that mounts to an exterior wall, and automatic shutters close over the opening when the fan is off. The tradeoff is a more demanding installation: the product specifies hardwiring, and its noise rating of under 65 dB may be noticeable in a quiet greenhouse. It also offers less airflow than larger models in the roundup.
Pros:- 960 CFM capacity and stated 1,400-square-foot coverage suit larger spaces than the 8-inch model.
- Variable speed and thermostat control allow ventilation to respond to changing heat.
- Automatic shutters cover the wall opening when the fan is off.
- Galvanized steel and aluminum construction is suited to wall-mounted exhaust use.
Cons:- Hardwiring makes installation less straightforward than a plug-in fan.
- Noise rating is under 65 dB, which may be noticeable in a quiet greenhouse.
- Moves less air than larger exhaust options in the roundup.
Best for: Greenhouse owners with a large wall-vented space who want variable-speed, thermostat-controlled exhaust and can arrange hardwired installation.
Not ideal for: Small greenhouses, quiet work areas, or buyers seeking a plug-in installation; the fan is relatively powerful, may be audible, and requires hardwiring.
- Airflow capacity:960 CFM
- Stated coverage:Up to 1,400 sq ft
- Blade size:12 inches
- Mounting:Wall mount
- Controls:Variable speed and thermostat
- Power:65 watts; 115 volts, 0.6 A
- Noise level:Under 65 dB
- Motor:Permanently lubricated
- Materials:Galvanized steel and aluminum
Our verdict“Choose this for a larger greenhouse needing adjustable wall exhaust, provided hardwiring and a potentially audible fan are acceptable.”
VIVOSUN AeroWave D4 Grow Tent Clip Fan 4-inch 2-Pack
The AeroWave D4 is a circulation pair for growers who want to move air at two points rather than vent it outdoors. Two 4-inch clip fans can help reduce stagnant pockets around plants, and three speed settings give basic airflow adjustment. Compared with the single VIVOSUN AeroWave E6 Gen2, this pack offers two placements instead of one oscillating, Wi-Fi-controlled fan; the tradeoff is less detailed speed control and no listed smart control. Their 35 dB noise rating suits indoor growing, but the 85 CFM capacity per listed product is modest beside the wall-mounted 760 CFM and 960 CFM exhaust fans. USB power also means nearby power access is needed. The listing mentions magnetic placement, but notes that an iron plate is not included, so buyers should not count on that mounting method without separate hardware.
Pros:- Two fans allow airflow placement at separate points in a tent.
- Three speed settings provide straightforward adjustment.
- 35 dB listed noise level is suited to indoor growing spaces.
- Clip-on and angle-adjustable mounting helps direct air around plants.
Cons:- 85 CFM listed airflow is far below the capacity of the wall-mounted exhaust fans.
- USB power is required, so placement depends on accessible power.
- An iron plate for magnetic mounting is not included.
Best for: Grow-tent gardeners who want two compact fans to circulate air at separate positions and can provide USB power.
Not ideal for: Greenhouse owners seeking active heat and humidity exhaust, or buyers who need app control, oscillation, or included hardware for magnetic mounting.
- Pack size:2 fans
- Fan size:4 inches
- Airflow capacity:85 CFM
- Speed settings:3
- Noise level:35 dB
- Power:USB; 5 volts
- Maximum speed:3,500 RPM
- Mounting:Clip-on; listing also describes magnetic, suspended, and surface placement
Our verdict“Choose this pair for modest, distributed grow-tent circulation, not as a substitute for a greenhouse exhaust fan.”
Grow Tent Fan, 5-inch Dual Fans with 3 Speeds, Waterproof, Adjustable Direction, Timer & Thermostat Compatible
This dual-fan set is aimed at growers who need adjustable circulation in a humid tent or greenhouse, rather than a wall fan that exchanges indoor air with the outdoors. Its IP54 waterproof rating and clip-clamp mounting make placement inside a damp growing area more practical, while two 5-inch fans can direct airflow at separate canopy zones. The listing gives a combined airflow figure of 330 CFM, but does not describe oscillation; each fan points where it is set, so air coverage depends on placement and readjustment. Compared with the VIVOSUN AeroWave D4 pair, this model lists greater airflow and an IP54 rating, but its 45 dB noise figure is higher than the D4’s 35 dB. Timer and thermostat compatibility are mentioned, though external controls are needed for automation.
Pros:- Two fans offer separate airflow placement within a grow space.
- IP54 rating suits humid growing environments.
- Adjustable direction and clip-clamp mounting support targeted circulation.
- Brushless motors are listed with a lifespan of up to 67,000 hours.
Cons:- No oscillation, so coverage depends on fixed direction and fan placement.
- Timer or thermostat automation requires external controls.
- The 45 dB rating is higher than the VIVOSUN AeroWave D4 pair’s listed 35 dB.
Best for: Growers with humid indoor tents who want two direction-adjustable clip fans and already have, or plan to add, external timer or thermostat controls.
Not ideal for: Buyers who need automatic temperature-based exhaust, broad oscillating coverage, or the quietest circulation option; this set does not exhaust air and is listed at 45 dB.
- Pack size:2 fans
- Fan size:5 inches
- Airflow capacity:330 CFM
- Speed settings:3
- Noise level:45 dB
- Power:6 watts; AC/DC
- Mounting:Clip clamp
- Motor lifespan:Up to 67,000 hours, as listed
Our verdict“Pick this pair for targeted circulation in a humid grow space if you can supply external controls and do not need outdoor exhaust.”
VEVOR 16 Inch Wall Mounted Shutter Exhaust Fan with Automatic Louvers, 2438 CFM, Low Noise, Steel Housing for Attic, Garage, Workshop, Greenhouse
For a greenhouse that needs more exhaust capacity than a small wall fan can provide, this VEVOR pairs 2,438 CFM airflow with automatic shutters that close against rain and debris when the fan is off. Its 16-inch size makes it a middle ground between the smaller VEVOR 12-inch model and the higher-capacity Cammoo 20-inch fan: it moves more air than the former without the latter’s larger footprint and touchscreen controls. The steel housing and prewired setup suit a utility wall installation, though buyers still need to plan for the power connection.
The tradeoff is simpler control: it has one speed, and the speed controller and power plug are sold separately. At a listed 65 dB, it may also be noticeable near a quiet growing area. I’d choose it for straightforward exhaust, not fine-grained climate management.
Pros:- 2,438 CFM offers more exhaust capacity than the VEVOR 12-inch model.
- Automatic shutters help block rain and debris while the fan is off.
- Steel housing is suited to a utility wall installation.
- Prewired components can simplify installation.
Cons:- Single-speed operation provides less airflow control than the Cammoo 20-inch model.
- Speed controller and power plug are sold separately.
- Listed 65 dB noise may be intrusive in a quiet greenhouse.
Best for: Greenhouse owners who need substantial fixed-wall exhaust for a mid-size growing space and prefer automatic shutters over app-style controls.
Not ideal for: Growers who want thermostat-based or variable-speed ventilation, or who need a complete plug-and-play control setup.
- Airflow:2,438 CFM
- Blade size:16 inches
- Power:77 W
- Voltage:120 V
- Motor speed:1,500 rpm
- Noise level:65 dB
- Housing:Steel
- Mounting:Wall mount
Our verdict“Choose this VEVOR for strong, fixed-speed exhaust in a mid-size greenhouse if you can supply the missing power and speed-control components.”
Cammoo 20 Inch Exhaust Fan with 4000 CFM, Temp, Humidity, and Speed Control
The Cammoo is the lineup’s strongest fit for growers who want ventilation to respond to greenhouse conditions rather than relying on a fixed fan setting. Its 4,000 CFM capacity, 10 speeds, and touchscreen controls for temperature and humidity give it substantially more adjustment than the single-speed VEVOR 16-inch. The EC brushless motor is listed at 70 watts, so the fan combines high stated airflow with a modest power draw on paper. Timer and cycle functions add scheduling options for growers managing changing heat or moisture through the day.
That control comes with a more involved setup. The 20-inch wall-mounted unit may be too large for smaller greenhouse openings, and installation can call for technical skill. Unlike the simpler VEVOR 12-inch, this is not the pick for a basic exhaust-only job; its appeal depends on using the touchscreen and environmental settings. It also requires 120 V power.
Pros:- 4,000 CFM provides the highest listed airflow among these five products.
- Ten speeds allow finer airflow adjustment than the single-speed VEVOR 16-inch.
- Touchscreen controls include temperature, humidity, timer, and cycle settings.
- EC brushless motor is rated at 70 watts.
Cons:- The 20-inch size requires a suitably large opening and wall space.
- Installation may require more technical skill than the smaller VEVOR fans.
- Requires a 120 V supply, limiting placement where power is unavailable.
Best for: Greenhouse growers with a sizeable wall opening who want adjustable airflow and temperature and humidity controls in one exhaust fan.
Not ideal for: Owners of small greenhouses or anyone seeking a simple, low-complexity fan without touchscreen controls or a larger installation.
- Airflow:4,000 CFM
- Fan size:20 inches
- Motor:EC brushless
- Power:70 W
- Voltage:120 V
- Speed settings:10
- Controls:Touchscreen; temperature, humidity, timer, and cycle functions
- Mounting:Wall mount
Our verdict“Pick the Cammoo if your greenhouse can accommodate a 20-inch fan and you’ll use its temperature, humidity, and speed controls.”
Grow Tent Fan 2 Pack, 5.5-inch Greenhouse Clip Fans with Brushless Motor, Adjustable Speed, and Low Noise
These two clip fans solve a different greenhouse problem from the wall-mounted VEVOR and Cammoo exhaust fans: they move air around plants rather than exhausting it through an opening. Their clamp mounts and adjustable direction let growers place airflow near a humid corner, dense canopy, or grow-tent shelf, and three speeds offer more flexibility than a fixed-output clip fan. At a listed 40 dB, they’re also a quieter choice for close-range circulation than the larger VEVOR 16-inch, whose listed noise level is 65 dB.
The limit is capacity and role. Although the listing states 520 CFM, these small fans are not a substitute for removing hot, moist air from an enclosed greenhouse. They run on 5 V DC and require a USB power source; no battery is included. I’d use them to supplement an exhaust system, not as the main ventilation solution.
Pros:- Two fans provide airflow at separate plant or canopy locations.
- Clip mounts make placement and repositioning easier than fixed wall fans.
- Three speed settings allow localized airflow adjustment.
- Listed 40 dB noise level suits spaces where quieter circulation is preferred.
Cons:- Circulates air rather than serving as a wall-mounted exhaust system.
- Requires a USB power source, and no battery is included.
- Plastic construction may be less robust than the steel housings of the VEVOR exhaust fans.
Best for: Grow-tent and greenhouse growers who need two movable fans to improve airflow around plants, shelves, or stagnant pockets.
Not ideal for: Anyone relying on a fan to exhaust heat and humidity from a whole greenhouse or who needs cordless operation.
- Quantity:2 fans
- Fan size:5.5 inches
- Airflow:520 CFM
- Speed settings:3
- Noise level:40 dB
- Power:5 W
- Voltage:5 V DC
- Mounting:Clip/clamp
Our verdict“Choose this two-pack as supplemental, repositionable plant-level circulation, not as your greenhouse’s primary exhaust fan.”
10-inch Upgraded Shutter Exhaust Fan with Thermostat & Remote Control
This 10-inch exhaust fan is the compact, more hands-off alternative to the VEVOR 12-inch. Its 890 CFM airflow is a better match for a smaller greenhouse or a limited wall opening, while thermostat control and a remote give growers a way to manage ventilation without reaching the unit. Three listed speeds and automatic shutters add useful flexibility: the shutters close when the fan is off, helping limit exposure to weather and debris.
Capacity is the main compromise. The VEVOR 12-inch is rated at 1,347 CFM, so it has more headroom for hotter or larger spaces. The listed noise figures also conflict: the specs say 45 dB, while the pros claim no more than 40 dB, so I would not choose it on a promise of near-silent operation. Wall, ceiling, or window mounting options may widen placement choices, but installation still needs a suitable opening.
Pros:- Thermostat control can automate ventilation as temperatures change.
- Remote control makes operation easier when the fan is mounted out of reach.
- Automatic shutters help guard the opening when the fan is off.
- Three speeds provide more adjustment than the single-speed VEVOR 16-inch.
Cons:- At 890 CFM, it has less stated capacity than the VEVOR 12-inch and 16-inch.
- Noise information is inconsistent between the listed specifications and product claims.
- Mounting requires a correctly sized opening and may call for installation work.
Best for: Small-greenhouse owners who want thermostat-led exhaust and remote operation in a more compact fan than the VEVOR 12-inch.
Not ideal for: Growers with larger or heat-intensive greenhouses who need airflow closer to the VEVOR 12-inch or Cammoo 20-inch capacity.
- Airflow:890 CFM
- Fan size:10 inches
- Power:36 W
- Voltage:120 V
- Speed settings:3
- Listed noise level:45 dB
- Controls:Thermostat, buttons, and remote control
- Mounting:Wall, ceiling, or window
Our verdict“Choose this model for a smaller greenhouse where thermostat and remote control matter more than maximum exhaust capacity.”
VEVOR 12 in Shutter Exhaust Fan Wall-Mount Automatic Louvers Variable Speed, Steel Housing, Low Noise, AC Motor, 1347 CFM Ventilation for Attic, Garage, Workshop
With 1,347 CFM airflow in a 12-inch format, this VEVOR is the most compact wall-mounted exhaust option here for growers who have less room for a fan opening. It offers more stated capacity than the 10-inch thermostat-and-remote model, though that smaller fan provides more explicit automatic temperature control. Automatic shutters on the VEVOR help cover the opening when ventilation is off, and its steel construction favors a utility installation over the lighter plastic clip fans.
Its controls are basic by comparison: the product title describes variable speed, but the listed specs show button control and do not state a speed count. It also lacks the Cammoo 20-inch’s documented touchscreen temperature and humidity settings. At 60 dB, it may be noticeable, and the indoor-use listing means greenhouse placement should be protected from direct weather exposure. This is a practical exhaust pick, not an automated climate controller.
Pros:- 1,347 CFM exceeds the listed capacity of the 10-inch remote-controlled fan.
- 12-inch size can fit tighter openings than the VEVOR 16-inch or Cammoo 20-inch.
- Automatic shutters help protect the opening from rain and debris while off.
- Alloy-steel construction suits fixed utility installations.
Cons:- The listed specifications do not state how many speed settings are available.
- At 60 dB, operation may be audible in a quiet greenhouse.
- Listed for indoor use, so placement needs protection from direct outdoor exposure.
Best for: Greenhouse owners with a limited wall opening who want more exhaust capacity than a 10-inch fan and automatic shutters.
Not ideal for: Growers who need documented thermostat automation, multiple specified speed settings, or an installation exposed directly to outdoor conditions.
- Airflow:1,347 CFM
- Fan size:12 inches
- Power:58 W
- Voltage:120 V
- Motor:AC
- Motor speed:1,600 rpm
- Noise level:60 dB
- Housing:Alloy steel
Our verdict“Pick this VEVOR for compact, shuttered wall exhaust when you value airflow and a smaller opening over detailed climate controls.”
How We Picked
I ranked these products for greenhouse ventilation by looking first at their intended job: exhausting warm, humid air through a wall or providing localized air movement among plants. I weighed stated airflow and fan size alongside the controls described, including thermostats, speed adjustment, humidity control, timers, and remote operation. For exhaust fans, automatic louvers and housing materials also matter because they affect installation fit and how the unit closes when idle; for clip fans, adjustability, pack size, and motor style shape their usefulness inside a growing area.
The order favors products with a practical balance of airflow, control, and greenhouse-relevant design, rather than simply placing the largest CFM rating first. Larger fans can move more air but may be excessive for a small greenhouse, while compact clip fans cannot exchange air through the building envelope. I also distinguish between products with specific listed capacity and those whose descriptions emphasize controls or mounting. Since greenhouse dimensions, duct or opening restrictions, and electrical requirements vary, buyers should verify fit and manufacturer specifications before purchase.
Factors to Consider When Choosing Greenhouse Ventilation Fans
Choosing a greenhouse fan starts with the ventilation job, not the product name. These factors help prevent common mismatches such as buying a circulation fan for heat removal or selecting more exhaust capacity than a small structure can use well.
1. Match Airflow to Greenhouse Volume
Estimate the greenhouse’s interior volume before comparing CFM figures: multiply its length, width, and average height. Then use a ventilation target suited to your climate, glazing, shading, and heat load, since a sunny greenhouse can need more air exchange than a shaded one of the same size. A high rating is not automatically better; excess capacity can add noise and may make temperature control less steady if the fan runs in short bursts. The lineup spans a stated 760 CFM for an 8-inch model to 4,000 CFM for the Cammoo, showing why size and capacity should be considered together. Check whether the rating reflects the fan’s actual installed configuration, since louvers, screens, and restricted openings can reduce real airflow. If uncertain, plan around the manufacturer’s sizing guidance rather than relying on diameter alone.
2. Decide Between Exhaust and Circulation
An exhaust fan moves air out of the greenhouse and relies on a suitable inlet opening for replacement air. Clip fans move air within the structure, helping reduce stagnant pockets around foliage, but they do not expel heat or humidity by themselves. This distinction matters in a tightly enclosed greenhouse: several clip fans can keep leaves moving while the overall air remains hot and damp. A practical system often pairs an appropriately sized exhaust fan with one or more circulation fans, especially where shelving or dense plant growth blocks airflow. Avoid comparing clip-fan airflow claims directly with exhaust-fan CFM as if they perform the same task. Decide which problem comes first—whole-space heat removal or local air movement—then choose equipment for that job.
3. Choose Controls for Your Routine
A thermostat can switch an exhaust fan on as temperatures rise, while variable speed can let you tune airflow rather than relying on a simple on-off cycle. Humidity control adds another mode of response, but it is most useful when excess moisture is a recurring concern and the control can be set appropriately for the growing environment. Remote operation may help when the fan is hard to reach, though it does not replace a dependable sensor or a clear manual control path. More controls can mean more setup choices, so a beginner with a small greenhouse may prefer a straightforward thermostat over a feature-heavy unit. Check whether the sensor is included, where it measures conditions, and how the fan behaves after a power interruption. Buy automation to solve a real monitoring task, not just because the feature list is longer.
4. Plan the Opening, Mounting, and Weather Exposure
Shutter fans need an opening that matches the unit and a wall or panel able to support its weight. Confirm the cutout dimensions, mounting depth, electrical connection, and whether louvers open freely before committing to a location. Automatic or gravity louvers can help close the opening when the fan is off, but the inlet side still needs a planned path for replacement air. Greenhouses exposed to wind-driven rain or dust may need added protection, and not every fan described for a garage or workshop is automatically suited to outdoor exposure. Avoid placing an exhaust fan where it simply pulls air from a nearby door or vent without sweeping the plant canopy. When the wall material or wiring is unfamiliar, professional installation can prevent a poor seal or unsafe connection.
5. Balance Noise, Power, and Run Time
A fan that runs for long periods makes noise and operating draw more relevant than a unit that only cycles during peak heat. The lineup includes descriptions that emphasize low noise and a low-wattage DC motor, but buyers should compare full specifications rather than assume that a smaller fan is always quieter or more efficient. Variable-speed operation can help avoid running at maximum output when moderate airflow is enough. Consider where the greenhouse sits relative to a home, neighbor, or work area, and whether nighttime ventilation will be needed. Also check the motor’s duty-cycle guidance and maintenance requirements for continuous seasonal use. A quieter, controllable fan may suit a small residential greenhouse better than a larger unit chosen only for peak airflow.
6. Account for Climate and Seasonal Control
Ventilation needs change with outdoor temperature, humidity, wind, and the amount of solar heat entering the greenhouse. In hot weather, exhaust can remove accumulated heat, but it cannot cool incoming air below the outdoor temperature; shading and other cooling measures may still be needed. In cool or damp seasons, excessive ventilation can chill plants, so a thermostat or adjustable speed can help moderate operation. Humidity control may assist with moisture management, but it cannot replace watering practices, spacing, or good drainage. Make a seasonal plan for intake openings and fan settings instead of leaving the system at one speed year-round. Buyers in climates with large temperature swings should prioritize controllability over maximum airflow alone.
Frequently Asked Questions
Can a clip fan replace a greenhouse exhaust fan?
No. Clip fans such as the VIVOSUN AeroWave models and the 5-inch grow-tent options circulate air inside the greenhouse, but they do not remove warm, humid air from the structure. An exhaust fan moves indoor air outdoors and needs an intake opening so replacement air can enter. If heat buildup is the problem, choose an exhaust system first and add circulation fans where airflow remains uneven. Using clip fans alone may keep leaves moving while the overall greenhouse temperature stays high.
How do I know whether a 12-inch fan is enough for my greenhouse?
Fan diameter by itself cannot answer that; compare the unit’s stated CFM with your greenhouse volume and local heat load. The Amico 12-inch lists 1,282 CFM, while the iLIVING 12-inch description highlights thermostat and variable-speed control, so their selling points are not identical. Measure the interior and consider glazing, sun exposure, shading, and how freely air can enter. Also account for screens, shutters, or other restrictions that can lower installed airflow. If the structure is large or receives intense sun, use manufacturer sizing guidance before settling on a 12-inch model.
Should I choose a thermostat or a temperature-and-humidity controller?
A thermostat is usually enough when the main goal is switching exhaust on as the greenhouse warms. A controller that also responds to humidity can suit growers who regularly manage moisture buildup, but it adds settings and may require more attention to sensor placement. The Cammoo emphasizes temperature, humidity, and speed control, while several iLIVING and Amico models focus on thermostat-based operation. Think about which condition actually triggers your ventilation needs and whether you will adjust the controls across seasons. Avoid paying for humidity automation if moisture is not a recurring concern or if you prefer manual operation.
Is the highest-CFM fan the safest choice for a small greenhouse?
Not necessarily. The Cammoo’s listed 4,000 CFM is far above the 760 CFM stated for the 8-inch shutter fan, but the larger rating may be more capacity than a compact structure needs. Excessive airflow can create uneven conditions, increase noise, and make temperature management harder if the fan cycles too aggressively. Size the fan to greenhouse volume and plan an adequate intake opening so the exhaust is not starved for replacement air. Adjustable speed can make a higher-capacity model more flexible, but it does not remove the need to check sizing and installation requirements.
What should I check before mounting a shutter exhaust fan in a greenhouse wall?
Verify the required opening dimensions, mounting depth, electrical needs, housing suitability, and support strength for the wall or panel. Check how the louvers operate and whether they can close properly when the fan is off, especially if the wall faces wind or rain. Plan an intake opening on another side of the greenhouse so the fan can draw air through the growing area rather than from the nearest gap. Review the manufacturer’s installation and exposure guidance because greenhouse use can involve moisture and temperature conditions unlike a garage. If wiring or wall cutting is outside your experience, arrange qualified help before installation.
Conclusion
For a balanced combination of stated airflow and adjustable operation, I recommend the Amico 12-inch shutter fan as the best overall. The 8-inch 760 CFM shutter fan is the best value-style choice for a smaller structure with modest ventilation needs, while the Cammoo 20-inch is the premium pick for buyers who want temperature, humidity, and speed control in a higher-capacity unit. Beginners may find the iLIVING 12-inch easier to match to a straightforward wall-mounted exhaust setup with thermostat and variable-speed control. For localized airflow rather than whole-greenhouse exhaust, choose a VIVOSUN AeroWave or a dual clip-fan set; for a larger structure, compare the 16- and 20-inch exhaust models against measured greenhouse volume before buying. The right choice is the fan that fits your space and ventilation job, not simply the one with the largest number.
