A greenhouse can become too hot for you and your plants very quickly without a properly sized ventilation system to provide adequate cooling. An exhaust fan system or automated roof vents can provide all of the needed ventilation / cooling during cooler seasons, but cooling in the summer can be much more difficult. A combination of shade, proper ventilation, and an evaporative cooling system like a misting system or evaporative cooler is recommended when outside temperatures begin to heat up.


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Heavy Duty Grounded Timer timer, 24, hour, light, plant, grow, auto, greenhouse, heavy, duty, 120, volt
Price: $15.95
Availability: In stock
Item #: 5620100 -

    This 24 hour timer plugs directly into a wall outlet and can handle 1875 watts. You can set up to 48 cycles in 15 minute increments and set intervals from 15 minutes up to 24 hours making this timer excellent for lighting systems. No little pins to lose! Timer also features a manual override switch and LED light to indicate when power is on. 120 volt

    Inflation Blower Mounting Bracket
    Price: $18.95
    Availability: In stock
    Item #: 8030110 -

      These blowers are used for inflating two layers of polyethylene on a greenhouse. The air space between the two layers provides the greenhouse with insulation. Fan has an adjustable inlet for obtaining proper operating pressure. 4" diameter mounting flange. 50 CFM max output, 32 CFM at 0.4" SP Inflation Fan Mounting Bracket Instructions ...

      SureStat T110 Weatherproof Heating / Cooling Thermostat thermostat, water, proof, greenhouse, remote, sensor, surestat, temperature, control
      Price: $39.95
      (1)
      Availability: In stock
      Item #: 4820400 -

        This thermostat has a weatherproof enclosure making them an excellent option for wet environments. The single stage thermostat can be used to automatically control ventilation fans or heaters. This thermostat was developed with the harsh greenhouse environment in mind. Temperature coil is stainless steel to prevent corrosion. SPDT switch. Wiring required. Features Wide temperature range: 30° to 110° F Fixed 3 degree temperature differential Can be used with millivolt, 12, 24 and 120 volt...

        SureStat T118P Plug In Portable Thermostat Control thermostat, plug, in, prewired, cord, line, voltage, heater, fan, cooling, control, portable, 110, 120
        Price: $55.95
        (2)
        Availability: In stock
        Item #: 4820410 -

          This single stage thermostat comes prewired with an 8' grounded Plug in power cord. Simply plug the thermostat into a standard 110/120 volt outlet. Then plug any 110/120 volt appliance into the outlet on the plug of the thermostat. Select heating thermostat to control a heater or cooling thermostat to control fans and/or louvers. *Plug-in thermostats can not be used with our gas heaters. They require 24 volt thermostats. Features Wide temperature range: 30° to 110° F Fixed 3 degree...

          Bayliss MK7 Replacement Power Tube bayliss, mk7, power, tube, cylinder, replacement, spare, piston, vent, opener, rod, part
          Price: $26.95
          (1)
          Availability: In stock

            Bayliss power tube life is not infinite. Over the years, the piston moving through the seals gradually wears the seal material away, allowing a gradual seepage of wax out of the tube. This in turn reduces the pressure within the tube and eventually the opening distance achieved will be affected. This is when you need to replace the power tube cylinder.Bayliss MK7 power tubes are available with 2 different models. The only difference is the operational temperatures of the power tube. The Orchid...

            Evaporative Cooler Replacement Pads
            Price: $36.00
            Availability: In stock

              Replacement Aspen pads for evaporative air coolers. Just select the model cooler you have. You will receive a set of 3 pads which includes 2 for the side panels and 1 for the rear panel.

              Gigavent Replacement Power Tube gigavent, power, tube, cylinder, replacement, spare, piston, vent, opener, rod, part
              Price: $69.95
              Availability: In stock
              Item #: 8040155 -

                This cylinder tube powers the Gigavent automatic openers with no need for electricity. It contains a mineral wax which expands with heat. This pushes a piston which opens the auto vent via a balanced linkage. As the temperature drops, the wax shrinks and a strong spring closes the vent and resets the piston.While this cylinder for the Gigavent automatic vent opener lasts a long time, eventually the piston rod moving through the seals will wear the seal material away, allowing a gradual seepage...

                Intake Fan Adjustable Elbow
                Price: $8.95
                Availability: In stock

                  Intake Fan AccessoryThe adjustable elbow allows you to direct the air flow from the intake fan in any direction up to 90 degrees.Options4" elbow is for use with the 4" intake fan system8" elbow is for use with the 8" intake fan system

                  Intake Fan Wall Vent + Damper
                  Price: $28.90
                  Availability: In stock

                    Intake Fan AccessoryThis is an optional exhaust outlet for the intake fan in areas that are tightly sealed. The outlet is screened and sealed with an automatic gravity damper.Options4" wall vent is for use with the 4" intake fan system8" wall vent is for use with the 8" intake fan system

                    Intake Fan Wye + Screened Cap
                    Price: $28.90
                    Availability: In stock

                      Intake Fan AccessoryThe Wye connector splits the air flow from the intake fan into two directions for better air dispersion. An extra screened cap is included so both ends of the wye are protected.Options4" Wye is for use with the 4" intake fan system8" Wye is for use with the 8" intake fan system

                      Univent / Ventomax Replacement Power Tube univent, power, tube, cylinder, replacement, spare, piston, vent, opener, rod, part, ventomax
                      Price: $19.95
                      Availability: In stock
                      Item #: 8040130 -

                        This cylinder tube powers the Univent and Ventomax automatic openers with no need for electricity. It contains a mineral wax which expands with heat. This pushes a piston which opens the auto vent via a balanced linkage. As the temperature drops, the wax shrinks and a strong spring closes the vent and resets the piston. While this automatic vent opener cylinder lasts a long time, eventually the piston rod moving through the seals will wear the seal material away, allowing a gradual seepage of...