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thermostat to control a heater and fan

Discussion in 'Indoor Growing' started by GreenGro, Apr 17, 2007.


    GreenGro Well-Known Member

    Hi can anyone advise me how I wire up a thermostat to switch on a fan when the temp gets to high and another to control a heater when it gets too cold please?

    I can buy a pair of thermostats for about £10 but to buy a unit ready made from a hydro shop this will cost about £180, there must be a simple way?

    Also if anyone can help with this, is it relatively easy to also make the fan idle at a minimum speed.

    Thanks for looking guys

    GreenGro Well-Known Member

    Anyone at all? :cry:
    Vote 2 Legalize Marijuana

    Vote 2 Legalize Marijuana Well-Known Member


    GreenGro Well-Known Member

    Thanks vote2, I will check it now

    GreenGro Well-Known Member

    Just had a look at instructables and I could find a way of wiring a thermostat to control a heater and it looked a little more complexed than I had imagined.

    Jorge Cervantes in his ultimate grow video shows him setting up a grow space with a board with a humidistat and and thermostat controlling fans, he doesn't say how its done just that the wiring is simple, does anyone know what you have to do?

    What does everybody else use to control the temperature in your grow rooms? in fact scrap this I'll start another thread for this.

    johnb93 Active Member

    http://images.google.com/imgres?imgurl=http://img.nextag.com/image/LUXPRO_5_2_Programmable/1/000/005/008/677/500867745.jpg&imgrefurl=http://www.nextag.com/Electrical--a-Electrical%2BType-_-Outlets--zz2700352zB4z5---html&h=100&w=100&sz=2&hl=en&start=3&um=1&tbnid=KORvzmMc8MTX8M:&tbnh=82&tbnw=82&prev=/images%3Fq%3Doutlet%2Bthermostat%2Buk%2Bplug%26svnum%3D10%26um%3D1%26hl%3Den%26sa%3DN go to that site. purchase TWO of the lux products programable thermostats. then go to ebay and get FOUR outlet convertors. on for the input and output on each thermostat. they are so simple. you plug it in to an outlet. select heat or cool. put ur fan as the cooling one adn heat as heating one. set temp for each time of day. (allow a few degrees between when the heater goes on and when the cooler goes on so u dont ahve em both counteracting echother all the time.) done.

    GreenGro Well-Known Member

    Cheers guys

    I bought a primair after, keeps the fan turning as much as you set and kicks into full power when the room gets too hot - switch it on, forget about it, nice

    delta9 Well-Known Member

    you could experiment and try to keep your room a constant temp. my seedlings are in the basement where it is normaly this time of year about 55-60 so i use a space heater during light to bring temp to 70 and let them ride dark out at 55-60 seems to be working fine. goodluck

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