Leeboy said:

Running a 4x4 with a HLG 550 out in the garage . My garage maintains 9-10 degrees Celsius all winter , but gets hotter in the summer. I have the T3 heater and a S6 fan. I been using the T3 on vpd mode. The heat is good but it’s struggling keeping it in the VPD because we’re getting some warm weather swings. I’m wondering if one of these controllers would help, or is my conditions to extreme ? Thanks

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I grow in a small shed outdoors with extreme temps and I use the old "dumb" AC infinity fans for intake and extraction. If you already have fans you can use inkbird controllers.

In the summer I bypass the hot air trapped in the shed and my intake air comes from outside. If it's 80° outside it will be 105° in the shed but the tent only gets the outside air. I create positive pressure by keeping the exhaust low so the tent puffs up like a balloon and keeps the really hot shed air out.

An other controller isnt going to get it cooler.

Only way i would say is get your fresh air direct from outside, run lights when its the coldest temp outside or invest in airco wich is not friendly for the wallet if you just grow for fun.

Atleast thats how i work when its not winter.

If you have an AC AI+ and the AC lights u could let them dim when vpd gets to high, but this only works with thier lights, i've tried thier usbc to utp converter for my mars hydro sp6500 and fe4000 but it will only turn on and off not dimm.

Thanks guys . I should have explained a little better. It's not the heat I'm worried about. It's the VPD while using the T3 heater in VPD mode and humidity I'm trying to control. Since I have to have my exhaust fan on manual or a digital timer , it's getting tricky. I was wondering if one of those controllers could tell my heater and fan to turn on to keep it where I want it throughout the year . This winter , I had my exhaust fan on for 2 mins then off for 5 to maintain the heat and try and keep the humidity in check to prevent powdery mildew. Both my heater and 6" exhaust fan are AC Infinity.