

🌿 Grow smarter, not harder — precision heat for next-level cultivation.
The THERMOFORGE T3 by AC Infinity is a cutting-edge environmental heater designed specifically for grow tents, rooms, and greenhouses. Featuring a smart VPD temperature controller, 10-level PTC heating with PWM control, and a flexible 4 ft extension hose, it delivers precise, energy-efficient warmth exactly where needed. Compact and compatible with UIS smart controllers, it offers professional-grade climate control to optimize plant growth and maximize yields.













| ASIN | B0CVQXZ9FT |
| Amperage | 5 Amps |
| Best Sellers Rank | #12,593 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #18 in Outdoor Heaters |
| Brand | AC Infinity |
| Burner type | Radiant |
| Color | Black |
| Customer Reviews | 4.4 4.4 out of 5 stars (593) |
| Date First Available | February 15, 2024 |
| Form Factor | Tower |
| Fuel Type | Electric |
| Indoor/Outdoor Usage | Indoor |
| Item Weight | 9.28 pounds |
| Item model number | AC-SFT3 |
| Manufacturer | AC Infinity |
| Max Temperature Setting | 140 Degrees Fahrenheit |
| Min Temperature Setting | 15 Degrees Celsius |
| Mounting Type | Floor Mount |
| Number of Speeds | 10 |
| Product Dimensions | 5.94"D x 11.49"W x 12.12"H |
| Recommended Uses For Product | Tent |
| Room Type | Grow Area |
| Special Feature | Adjustable Temperature, Automatic Shutoff System, Digital Display, Portable, Smart VPD Controls |
| UPC | 819137024489 |
| Voltage | 120 Volts (AC) |
R**T
Very nice little heater.
I Hooked my T3 up to the AC infinity AI+ controller via UIS Interface and it performs perfectly well in 4x8 set up. It is a little smaller than what I actually expected, which in my case is a benefit due to the smaller footprint. Hard to go wrong with AC Infinity, I have been using enough of their products enough time now to truly appreciate the company and their quality gear. It Works Great!
M**L
Elegant and sturdy - Quality I expect from AC infinity
I bought this, the AC Infinity AI controller, the Humidifier and own 2 inline fans. With just this a pull fan and the humidifier going with the AI controller i watched VPD be kept in perfect check. I'm normally terrible about this and just set a Temp. The heater has a flex tube you can adjust to blow into a room or just heat the room its in. The screen is easy to read and use. The screen turns off and is controlled by the AI controller if connected, which is fine honestly. The quality as as you'd expect. from AC infinity, elegant, smooth and feels sturdy. It worked for over 4 months off and on automatically and worked great. It definitely uses far less energy than the radiant heater I was using and probably paid for itself. I love AC infinities feel and quality. If you are in the market for a grow room heater then this is worth your money.
J**R
No need to buy another brand
I grew 3 plants in my unheated garage during the frigid temperatures we had in ohio this past January when we had many nights in succession of temperatures between 0 & -22f. This heater kept my plants at 60f-65f during overnight hours and no problems during the day maintaining temps of 72f-78f. Inside my garage it was in the 30s when outdoors it was 0f to -20f. I am very impressed with this heater.
P**N
Awesome for tents or rooms
I was needing a heater for my 5x5 grow tent in my garage. Since I have been using AC Infinity for several years I decided on the Thermoforge T3. It is super quiet, has 10 different heat levels and can be programmed to maintain your desired temp. It comes with a long hose and can be used inside or outside the tent. Great quality and great value. I have since bought another T3 for my other tent.
R**K
The auto feature
So I ordered one of these probably a month and a half or so ago set it all up it was working okay for about 8 hours and then so I had it on the auto mode and it just would not show anything temperature or humidity or everything it promises to do it's supposed to sense that he on and off like a thermostat with this little bulb so I sent it back and it was replaced and then this one I've had going probably for over 3 weeks it was okay but one other thing I don't like about it I have a 4x4 can't it's not really big even on high with an ambient temperature of 61°, it could not even reach 70°. Inside and closed 4x4 mind you so yeah it'll work if you run it on on all the time but that's not the point it's supposed to on and off in the parameters that you set humidity PDF blah blah blah but it's doing the same symptoms the first one did except it took about 3 weeks longer and then it doesn't even heat that well it can't keep up in a 4x410 at 60 degrees it's even maintain 70 something's wrong there but anyway that's not my big gripe my big gripe is the same thing it just starts losing the automatic function which I like to set parameters for what the temperature is so I guess in a nutshell I would probably highly recommend steering away from this thing and I do like a lot of stuff about Viva son but that thermal proheater yeah after getting the second one and it does the same thing within 3 weeks yeah there's an issue there so I I rarely write reviews on Amazon and I ordered thousands of dollars thousands of dollars yearly from them and I probably only had about well since probably 2010 maybe five things that I've actually written a bad review about and I order a lot for my company and my personal stuff but yeah I would say no to this ever again so I'm a single back with the old little heater and put a thermometer in there and let that work because this thing is drove me nuts I've even insulated the thing the tube want again it's not if it can't keep up 10° difference at 60 degrees that's an issue and when it this is the second one I've had within them a month and a half to two months and an automotive just blanks out and that it will work on on the only problem is it's on all the time so unless you're going to sit out there and turn it on and off you're going to ruin your plants so yeah I would highly stay clear of this
T**N
Great product
Great product. Right on the money with temperature control. Quiet. Easy to use. Great for value.
R**S
Received dirty used unit that smells of cigarettes
Item arrived used. Dusty, control screen wouldn't come on. Controller port was melted. The heater smelled like cigarettes. Im very disappointed!! I couldn't wait to receive this. Submitted for a return right away of the exact same item. I'll update this review when I get the replacement. Hopefully it's not broke and used also. UPDATE: Amazon did send me out another unit, got it 2 days later. This one was brand new like I was expecting. This heater is awsome for a grow tent during winter. Especially when you need the temp to be in the 80s for veg. I highly recommend this heater. Ac Infinity did a great job with this one! Updating to 4 stars for the stellar customer service from Amazon. Also for a top notch unit from AC Infinity. Would have been 5 stars all day had I not received the used one first.
J**D
Works great but settings must be adjusted right to heat
My room was 60 degrees and the tent wouldn't heat to 70. I learned the off must be set to 0, the on to 10, and then you can set auto to what you like.
C**R
Effective heater with tunable output.
A**E
Quiet and efficient, I have no complaints!
S**T
Super Gerät mit dem Controller AI+ muss man sich um nichts kümmern da die AI alles übernimmt. Einfach zurücklehnen und zuschauen wie alles wächst und gedeiht
B**N
Macht was es soll, schade nur das das Display nicht leuchtet während es mit dem Controller verbunden ist aber ist okay kann man mit leben
J**N
Love the heater just thinking I need to upgrade to a bigger one. Works great but I deal with -30+ weather so bigger is needed for me. I love all AC infinity products though.
Trustpilot
3 days ago
5 days ago