Greenhouse Ventilation Design

Greenhouse Ventilation Systems are an important part of the entire greenhouse. Without them, heat will build up quickly on sunny days. The greenhouse ventilation systems consist of an appropriately sized exhaust fan, 1 or 2 intake shutters and a thermostat. The sizes needed are determined by the square footage of your greenhouse. Don’t have electricity? Check out our Solar Powered Vent at the bottom of the page.Scroll all the way to the bottom for our solar powered exhaust fans.

Greenhouse Ventilation Systems

Features of Greenhouse Ventilation Systems

We suggest you place the exhaust fan up high in one end of the greenhouse. Place the shutter(s) down low on the opposite wall. Wire them to a one stage thermostat or two stage thermostat. This will enable your greenhouse ventilation system to give you the most efficient flow of air throughout the entire greenhouse. The motorized exhaust fans have an aluminum blade and pvc shutter. The heavy duty motors are totally enclosed and maintenance free. The motorized intake shutters are exterior grade PVC for a maintenance free unit. This will also resist rust and corrosion. The louvers are curved for a tight fit when closed. Corners are fused together for strength and durability. Greenhouse ventilation systems may be easily retrofitted in a polycarbonate greenhouse. But, we highly recommend purchasing them at the same time as a glass greenhouse.

Schaefer Motorized Exhaust Fan

FREE SHIPPING to Contiguous US
low profile aluminum blade, pvc shutter heavy duty motor
12″, 760 CFM, up to 120 sq ft. $225.00 Add to Cart
16″, 1250 CFM, 121- 200 sq ft. $275.00 Add to Cart
20″, 3122 CFM, 210 – 300 sq ft. $345.00 Add to Cart

Schaefer Motorized Intake Shutter

FREE SHIPPING to Contiguous US
white exterior grade PVC
curved louvers for a tight fit when closed
corners are fused for strength
12″, recommend 2 for 1 -12″ fan $260.00 Add to Cart
20″, recommend 2 for 1 -16″ fan $280.00 Add to Cart
22″, recommend 2 for 1 -22″ fan $290.00 Add to Cart

Schaefer Thermostats

FREE SHIPPING to Contiguous US
1 speed heating or cooling $87.00 Add to Cart
2 stage heating, 2 stage cooling, or 2 speed cooling $169.00 Add to Cart

Solar Powered Greenhouse Vent

Intake Shutter with Automatic Vent Opener – No Electricity Required

Do you have a greenhouse that needs ventilation where you have no electricity available? This intake shutter comes equipped with a solar powered opener. This opener is a wax cylinder that operates on the principle of contraction and expansion. When it is warm, the wax will expand and open the vent. When it is cool, it will contract and close the vent. This unit is available in 6 different sizes. The 4 smaller intake shutters may be installed directly into a polyfilm greenhouse (with no additional framing) using the wiggle wire that is included. If you prefer to mount these to a framed in opening minor modifications are required. Please let us know in customer comments how you intend to use the vent, framed or polyfilm. That way we will take care of the modifications for you. The 2 larger sizes must be mounted to a frame. The automatic openers can be adjusted so that they start opening between approximately 65 and 75 degrees F.

12″ Vent with Automatic Opener, Includes FREE SHIPPING to Contiguous US $145.00 Add to Cart

18″ Vent with Automatic Opener, Includes FREE SHIPPING to Contiguous US $199.00 Add to Cart

24″ Vent with Automatic Opener, Includes FREE SHIPPING to Contiguous US $225.00 Add to Cart

30″ Vent with Automatic Opener, Includes FREE SHIPPING to Contiguous US $279.00 Add to Cart

36″ Vent with Automatic Opener with no wiggle wire and base, Includes FREE SHIPPING to Contiguous US $255.00 Add to Cart

48″ Vent with Automatic Opener with no wiggle wire and base, Includes FREE SHIPPING to Contiguous US $355.00 Add to Cart

Solar Powered Exhaust Fans, Thermostats and Manual Louvers

solar powered exhaust fan with solar panel

thermostat for greenhouse solar ventilation package

thermostat for solar ventilation package

Have a greenhouse in a remote location? Need to ventilate it? No electricity around? Here is the solution to your problem. This solar powered exhaust fan comes appropriately sized with a thermostat and a shutter for the fan. Manual louvers are available to complete this package. We also have solar powered circulating fans to make this a complete package. These come in 3 different sizes.

Small greenhouse package:

6′ wide x 8′ long x 8′ high to 8′ wide x 12′ long x 9′ high

This package comes with a 12″ exhaust fan, 60 watt solar panel, 10 feet of cable with adaptors (no splicing required), solar panel platform mounting hardware, an exhaust fan shutter to protect the fan when it is not running and a thermostat kit. $825.00 with free shipping to the Contiguous US. Add to Cart

We recommend 1 – 18″ x 18″ solar powered greenhouse vent for this size kit

Medium greenhouse package:

10′ wide x 12′ long x 9′ high to 10′ wide x 16′ long x 9′ high

This package comes with a 16″ exhaust fan, 60 watt solar panel, 10 feet of cable with adaptors (no splicing required), solar panel platfom mounting hardware, an exhuast fan shutter to protect the fan when it is not running and a thermostat kit. $940.00 with free shipping to the Contiguous US. Add to Cart

We recommend 1 – 24″ x 24″ solar powered greenhouse vent for this size kit

Large greenhouse package:

12′ wide x 16′ long x 10′ high to 14′ wide x 30′ long x 10′ high

This package comes with a 20″ exhaust fan, 60 watt solar panel, 10 feet of cable with adaptors (no splicing required), solar panel platform mounting hardware, an exhaust fan shutter to protect the fan when it is not running and a thermostat kit. $1050.00 with free shipping to the Contiguous US. Add to Cart

We recommend 2 – 24″ x 24″ solar powered greenhouse vent for this size kit