Automate your greenhouse ventilation system with our quality climate controls including wired and plug-in thermostats, humidity controllers, cycle timers and more. Automating greenhouse cooling and ventilation is important for maintaining the optimal environment for plants. Choose from a variety of dependable and precise climate controls below.


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Autopilot Environmental Controller autopilot, environment, control, controller, temperature, humidity, timer, eclipse, F60, F90, digital
Price: $216.00
Availability: In Stock - Usually ships in 1 to 2 days.
Item #: 4821110 -

    The Autopilot Digital Environmental Controller combines precise temperature and humidity control along with cycle timing to create an intelligent yet easy-to-use unit. Three digital screens continuously display current temperature, relative humidity, and a cycle timing countdown clock. LED lights indicate active modes and inform the user of any errors. Controller mounts to both walls and grow tents. Two mounting kits are included. It has four outlets: Cooling, Heating, Humidify/Dehumidify,...

    Modulating Temperature Control
    Price: $219.00
    Availability: In Stock - Usually ships in 1 to 2 days.
    Item #: 4821210 -

      The Modulating Temperature Control allows you to automatically control the speed of fans with variable speed motors according to the ambient temperature. When the temperature is at the set point, fans operate at the idle speed setting.When the temperature exceeds the set point, it increases the fan speed.When the temperature increases 6°F above the set point, the fan speed will be at the maximum.When the temperature drops below the set point, the MTC-4C shuts off the fans (in shut-off...

      Plug-in Digital Dual Temperature Controller temperature, thermostat, dual, control, controller, humidistat, humidify, dehumidify, portable, plug, in, prewired
      Price: $74.95
      Availability: In Stock - Usually ships in 1 to 2 days.
      Item #: 4821030 -

        This unique controller has 2 independent built-in thermostats each with its own power outlet which provides a lot of flexibility controlling temperture in a greenhouse or grow room. No wiring is necessary. Simply plug the device you want to control into the corresponding outlet on the controller, select heating or cooling mode, and set the temperature you want to maintain.In Heating mode, in can control electric heaters, heating mats, and cables. In Cooling mode, it can automate fans, coolers,...

        Plug-in Digital Humidity Controller humidity, control, controller, humidistat, humidify, dehumidify, portable, plug, in, prewired, outlet, receptacle
        Price: $49.95
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        Availability: In Stock - Usually ships in 1 to 2 days.
        Item #: 4821010 -

          This humidity controller is both a humidistat and a dehumidistat. It has separate outlets for humidify and dehumidify modes which allows you to automate both types of equipment at the same time. In Humidify mode, it can be used to turn on a device like a solenoid valve which powers a misting system when the humidity level drops below the level you select. In Dehumidify mode, the controller can turn on a circulation fan, exhaust fan, or dehumidifier when the humidity level rises...

          Plug-in Digital Temperature & Humidity Controller temperature, thermostat, humidity, control, controller, humidistat, humidify, dehumidify, portable, plug, in, prewired
          Price: $79.95
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          Availability: In Stock - Usually ships in 1 to 2 days.
          Item #: 4821020 -

            This unique controller can be used as both a heating or cooling thermostat and humidistat or dehumidistat at the same time! Temperature and humidity are controlled by separate outlets. No wiring is necessary. Simply plug the device you want to control into the corresponding outlet on the controller, and select the set point you want to maintain.In Heating mode, in can control electric heaters, heating mats, and cables. In Cooling mode, it can automate fans, coolers, and mist cooling...

            SureStat DT10 Plug-in Digital Thermostat temperature, thermostat, digital, control, controller, portable, plug, in, prewired, cheap, greenhouse, prewired
            Price: $38.95
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            Availability: In Stock - Usually ships in 1 to 2 days.
            Item #: 4821230 -

              This plug-in temperature controller comes with a remote temperature sensor can be used to control heating and cooling devices at the same time. No wiring is necessary. Simply plug the device you want to control into the corresponding outlet on the controller and set the temperature you want to maintain. You can also customize the differential or dead-band for heating and cooling modes giving the controller maximum adjustability. Thermostat Features -50° to 210°F temperature rangeAdjustable...

              SureStat DT20 Plug-in Digital Thermostat / Cycle Timer temperature, thermostat, digital, control, controller, portable, plug, in, prewired, cycle, timer, cheap, greenhouse, prewired
              Price: $26.95
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              Availability: In Stock - Usually ships in 1 to 2 days.
              Item #: 4821220 -

                This unique controller can be used as a thermostat with remote temperature sensor or a cycle timer. Thermostat mode allows you to set both the ON and OFF temperatures instead of setting a single temperature like most thermostats. No wiring is necessary. Simply plug the device you want to control into the corresponding outlet on the controller and set the temperature range you want to maintain. Cycle Timer mode is designed to control devices that must be activated on a repeating cycle like a...

                10 Amp Fan Speed Control
                Price: $62.95
                Availability: In Stock - Usually ships in 1 to 2 days.
                Item #: 4820254 -

                  This variable control lets you manually adjust the fan speed for fans in your greenhouse from 30% to 100% of output capacity (Minimum output depends on fan). It also has the ability to turn a fan on and off. Controller comes in a weather proof electrical enclosure suited for greenhouse environments. Great option for equipment requiring a controller that can handle higher amperages like the ACF 24" variable speed exhaust fan. Operates on 110/120 voltage up to 10 amps. Wiring required. Speed...

                  Fan Speed Control (5 amp)
                  Price: $34.95
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                  (3)
                  Availability: In Stock - Usually ships in 1 to 2 days.
                  Item #: 4820450 -

                    This variable control lets you manually adjust the fan speed for exhaust and circulation fans in your greenhouse from 30% to 100% of output capacity (Minimum output depends on fan). It also has the ability to turn a fan on and off. Controller comes in weather proof electrical enclosures with watertight cover. This controller is very helpful in the winter when less ventilation is necessary and too much cold air flow at once from outside can cause temperature shock to nearby plants. Only use...

                    Portable Plug In Fan Speed Control (5 amp) fan, speed control, portable, plug, in, cord, exhaust, circulation, greenhouse, garage, shop, amp
                    Price: $48.95
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                    Availability: In Stock - Usually ships in 2 to 4 days.
                    Item #: 4820460 -

                      This variable control lets you manually adjust the fan speed for exhaust and circulation fans in your greenhouse from 30% to 100% of output capacity (Minimum output depends on fan). It also has the ability to turn a fan on and off. Controller comes in weather proof electrical enclosures with watertight cover. This controller is very helpful in the winter when less ventilation is necessary and too much cold air flow at once from outside can cause temperature shock to nearby plants. Only use...

                      Programmable Repeat Cycle Timer timer, cycle, repeat, interval, programmable, 7, day, seconds, digital, cheap, greenhouse, mist, water, misting
                      Price: $29.95
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                      Availability: In Stock - Usually ships in 1 to 2 days.
                      Item #: 4820355 -

                        This multifunctional timer can be used as an interval / repeat cycle timer, 7 day programmable timer, or countdown timer. The programmable timer function operates off of an internal clock and can be programmed with up to 19 different on & off settings. Each setting can be set to occur daily or during specific days of the week. The interval timer function is designed to control devices that must be activated on a repeating cycle like a solenoid valve controlling misting, drip, and irrigation...

                        Heavy Duty 24 Hour Grounded Timer timer, 24, hour, light, plant, grow, auto, greenhouse, heavy, duty, 120, volt
                        Price: $15.95
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                        (1)
                        Availability: In Stock - Usually ships in 1 to 2 days.
                        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

                          JDDT1 Adjustable Digital Thermostat (Wired) thermostat, water, proof, greenhouse, remote, sensor, j&d, temperature, control, digital, adjustable
                          Price: $105.00
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                          Availability: In Stock - Usually ships in 1 to 2 days.
                          Item #: 4820075 -

                            This thermostat is very accurate and can be used to control heating or cooling equipment. It has a NEMA 4X waterproof enclosure which was developed with harsh greenhouse environments in mind (it can even be used outdoors). The JDDT1 thermostat has a 10' waterproof temperature sensor which allows you to control temperatures remotely, and it retains settings in memory in case of power failure. The current temperature is shown on the digital display when thermostat is on. FeaturesHuge temperature...

                            JDDT1 Adjustable Plug In Digital Thermostat  J&D, thermostat, digital, plug, in, portable, cord, jddt, greenhouse, waterproof, outdoor, remote, sensor
                            Price: $125.00
                            Availability: In Stock - Usually ships in 1 to 2 days.
                            Item #: 4820076 -

                              This thermostat is very accurate and can be used to control heating or cooling equipment. It has a NEMA 4X waterproof enclosure which was developed with harsh greenhouse environments in mind (it can even be used outdoors). The JDDT1 thermostat has a 10' waterproof temperature sensor which allows you to control temperatures remotely, and it retains settings in memory in case of power failure. The current temperature is shown on the digital display when thermostat is on. Comes with 6' plug in...

                              Portable Thermostatic Outlets
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                              Retail: $21.95
                              Price: $15.95
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                              (2)
                              Availability: In Stock - Usually ships in 1 to 2 days.
                              Item #: 48202 -

                                Need an inexpensive and simple thermostat? Thermostatic outlets are the answer. These unique devices plug into a standard electrical outlet and have an internal preset thermostat. Outlets come in two models. The Cooling outlet supplies power at 78° and cuts off at 70° and works great for all types of fans including exhaust, circulation, window, attic, and ceiling fans. The Heating outlet supplies power at 35° and cuts off at 45° and is great for automating heaters to keep room temperatures...

                                SureStat TS110 Waterproof Heating / Cooling Thermostat
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                                Retail: $42.89
                                Price: $34.95
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                                Availability: In Stock - Usually ships in 1 to 2 days.
                                Item #: 4820930 -

                                  SureSTAT TS110 thermostats have a watertight 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...

                                  SureStat TS116 Plug In Portable Thermostat Control thermostat, plug, in, portable, control, heater, fan, greenhouse, garage, shop, room, home, ac, 4820940, 4820945
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                                  Retail: $59.95
                                  Price: $48.95
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                                  Availability: In Stock - Usually ships in 1 to 2 days.
                                  Item #: 48209 -

                                    This single stage thermostat comes prewired with an 6' 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. FeaturesWide temperature range: 30° to 110° FFixed 3 degree...

                                    SureStat TS200 2 Stage Thermostat Control thermostat, 2, two, stage, control, heating, cooling, water, proof, tight, weather, greenhouse, wet
                                    Retail: $66.55
                                    Price: $49.95
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                                    (1)
                                    Availability: In Stock - Usually ships in 1 to 2 days.
                                    Item #: 4820910 -

                                      This thermostat has a watertight enclosure making them an excellent option for wet environments. The two stage thermostat can be used to automatically open motorized louvers before cutting on an exhaust fan(s), stage multiple fan or heater systems, or operate multiple speed exhaust fans that do not already have a built-in control. Wiring required. Features Wide temperature range: 30° to 110° F Fixed 3 degree temperature differential between stages Can be used with millivolt, 12, 24 and 120...

                                      7 Day Programmable Timer timer, programmable, grow, light, plant, greenhouse, mist, misting
                                      Price: $24.95
                                      Availability: In Stock - Usually ships in 1 to 2 days.
                                      Item #: 5620105 -

                                        This digital timer operates off of an internal clock and can be programmed with up to 8 different on & off settings per day. Each setting can be set to occur daily or during specific days of the week. Each on or off period is programmed in 1 minute increments. Timer features a heavy duty grounded outlet on the front and plugs into a standard 110/120 volt outlet (15 amp max). 7 Day Timer Instructions ...

                                        SureStat T110 Weatherproof Heating / Cooling Thermostat thermostat, water, proof, greenhouse, remote, sensor, surestat, temperature, control
                                        Price: $39.95
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                                        (6)
                                        Availability: In Stock - Usually ships in 1 to 2 days.
                                        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 Cooling Thermostat thermostat, plug, in, prewired, cord, line, voltage, heater, fan, cooling, control, portable, 110, 120
                                          Price: $55.95
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                                          (4)
                                          Availability: In Stock - Usually ships in 1 to 2 days.
                                          Item #: 4820410 -

                                            UPDATEThis has been replaced by the Surestat TS116 thermostat. Click here to view the updated version.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. Cooling thermostat is great for automating fans and/or louvers. Features Wide temperature range: 30° to 110° F Fixed 3 degree differential Plug-N-Play, no wiring...

                                            Thermostat Piggyback Cord
                                            Price: $15.95
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                                            (1)
                                            Availability: In Stock - Usually ships in 1 to 2 days.
                                            Item #: 48201 -

                                              These cords can be wired to the Surestat T110 or the TS110 thermostats to convert them into plug-in thermostats. They can also be used as replacement plug-in cords for the Surestat thermostats that come with a piggyback plug-in cord installed. Item # 4820188, 4820190, 4820191 Piggyback Cord Wiring for Surestat Thermostats ...