Greenhouse Ventilation Systems

Proper ventilation is one of the most important criteria of designing a successful greenhouse. The hot summer sun can quickly overheat a greenhouse if proper ventilation is not provided. Shutter vents and exhaust fans installed in the gable ends of the greenhouse work best to forcefully exhaust hot air.

We carry only the highest quality aluminum and PVC fans and shutters. These are not the flimsy, thin fans and shutters found with most greenhouse kits.  Our greenhouse fans and shutters are designed for professional greenhouse installations.

Determine the proper size ventilation system for your greenhouse by calculating the cubic feet of air space in the growing area and plan to replenish that volume in less than two minutes for optimum cooling in summer.

Length x Width x Wall Height = Recommended CFM (Cubic Feet per Minute)

Circulating Fans

Plants will grow healthier with the proper amount of air circulation. Your greenhouse should not be drafty, but air movement should be slightly noticeable to prevent hot spots or cold spots. Good air circulation is valuable in both summer and winter and helps prevent disease.

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item GCF450

Circulating Fan - 8" 450 CFM
 

Schaefer Versa-Kool Circulating Fans:

  • Keep your greenhouse cool in summer.
  • Avoid cold spots in the winter.
  • Continually refresh the supply of carbon dioxide for healthy plants.
 

item price
$149.00

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item GCF2600

Circulating Fan - 12" 2,600 CFM
 

Schaefer Versa-Kool Circulating Fans:

  • Keep your greenhouse cool in summer.
  • Avoid cold spots in the winter.
  • Continually refresh the supply of carbon dioxide for healthy plants.
 

item price
$199.00

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item MIS12

Motorized Intake Shutter – 12" Aluminum
 

Heavy-duty Aluminum motorized shutter for thermostatically controlled ventilation needs.  Power Open, spring return, Voltage 120/240, 60 Hz, Single Phase.  Can be mounted horizontal or vertical.

 

item price
$

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item AGS16

Motorized Intake Shutter – 16” Aluminum
 

Heavy-duty Aluminum motorized shutter for thermostatically controlled ventilation needs.  Power Open, spring return, Voltage 120/240, 60 Hz, Single Phase.  Can be mounted horizontal or vertical.

 

item price
$119.00

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item AGS18

Motorized Intake Shutter – 18” Aluminum
 

Heavy-duty Aluminum motorized shutter for thermostatically controlled ventilation needs.  Power Open, spring return, Voltage 120/240, 60 Hz, Single Phase.  Can be mounted horizontal or vertical.

 

item price
$129.00

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item AGS24

Motorized Intake Shutter – 24” Aluminum
 

These high quality Aluminum Intake Shutters are hinged and balanced with such precision that the suction power of the exhaust fan on the opposite end of the greenhouse will pull the shutters open when the fan is running. The shutters then automatically close when the fan shuts off.

 

item price
$149.00

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item AGS30

Motorized Intake Shutter – 30” Aluminum
 

Heavy-duty Aluminum motorized shutter for thermostatically controlled ventilation needs.  Power Open, spring return, Voltage 120/240, 60 Hz, Single Phase.  Can be mounted horizontal or vertical.

 

item price
$179.00

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item RepCyl

Replacement Cylinder for Solar Powered Vent
 

Replacement Cylinder (paraffin wax inside the black cylinder and expands a piston that opens the cantilevered vent).

(Aluminum bracket sold separately.)

 

item price
$28.95

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item SolrVnt

Solar Powered Vent Openers
 

These automatic vents are activated by the heat of the sun. During the day, the sun warms up a paraffin wax inside the black cylinder and expands a piston that opens the cantilevered vent. As the sun goes down and the greenhouse cools, the piston retracts and the vent closes.

 

item price
$59.95

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