AC Infinity THERMOFORGE T3, Environmental Grow Tent Heater with VPD Temperature Controller, 10-Level PTC Heating and Included Extension Hose for Tents, Rooms, Greenhouses
Condition: New
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Availability:
In Stock.
Arrives
Sunday, Mar 29
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Features
- First-of-its-kind heater designed from the ground up with precision smart controls for ideal grow conditions.
- Onboard controller with corded sensor probe sets VPD and temperature triggers, timers, and cycles.
- Cutting-edge PTC plate technology offers 10 distinct heat levels using PWM control to finely tailor temperature.
- Flexible hose with additional 4 ft. attachment directs heat to focused areas within your grow space.
- Go beyond on/off smart outlets by integrating with our UIS controllers for true 0-100% output control.
Brand: AC Infinity
Special Feature: Adjustable Temperature, Automatic Shutoff System, Digital Display, Portable, Smart VPD Controls
Color: Black
Form Factor: Tower
Indoor/Outdoor Usage: Indoor
Special Features: Adjustable Temperature, Automatic Shutoff System, Digital Display, Portable, Smart VPD Controls
Form Factor: Tower
Indoor Outdoor Usage: Indoor
Power Source: Electric
Heating Method: PTC Heating
Recommended Uses For Product: Tent
Mounting Type: Floor Mount
Room Type: Grow Area
Heating Element: Radiant
Fuel Type: Electric
Number of Speeds: 10
Voltage: 120 Volts (AC)
Amperage: 5 Amps
Min Temperature Setting: 15 Degrees Celsius
Max Temperature Setting: 140 Degrees Fahrenheit
Brand Name: AC Infinity
Model Number: AC-SFT3
UPC: 819137024489
Item Type Name: Environmental Plant Heater
Manufacturer: AC Infinity
Included Components: Detachable Extended Hosing, Sensor Probe, Smart VPD and Temperature Controls
Item Dimensions D x W x H: 5.94"D x 11.49"W x 12.12"H
Item Weight: 4.22 Kilograms
Color: Black
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Mar 29
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
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!
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Reviewed in the United States on February 11, 2026 by Robert Bergquist
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.
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Reviewed in the United States on August 17, 2025 by Micheal P. Kloppel
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.
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Reviewed in the United States on March 2, 2026 by Joseph P Liptak Jr
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.
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Reviewed in the United States on February 26, 2026 by PStan
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
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Reviewed in the United States on December 31, 2024 by Rick
The adjustable power output and low wattage is perfect for a grow tent. No worries for accidental fire as the wattage is low enough to deny ignition and the anti tip shut off works 100%. Never deploy more than a 500 watt heater unattended. This unit fits the bill for set and forget.
Reviewed in the United States on March 17, 2026 by Gottabebill
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.
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Reviewed in the United States on December 19, 2025 by russ phillips
Great product. Right on the money with temperature control. Quiet. Easy to use. Great for value.
Reviewed in the United States on March 2, 2026 by Tammy Bryan