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AC Infinity

AC Infinity THERMOFORGE T3, Environmental Grow Tent Heater with VPD Temperature Controller, 10-Level PTC Heating and Included Extension Hose for Tents, Rooms, Greenhouses

  • Based on 681 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Jul 31
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Size: 530W, VPD Temp Controller


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.

Description

The first of its kind to apply pulse width technology (PWM) to its individual PTC plates and generate 10 distinct levels of precise heating for the optimal grow space. Go beyond on/off smart outlet control by connecting this heater to any UIS controller to get 10 distinct levels of control. Download the AC Infinity app to further access custom activation using climate triggers, grow cycles, scheduling, and automation programming. Create automation for your devices to systematically manage your grow tent environment. Set customizable alerts that can trigger to almost any event. Interactive graph intuitively displays temperature, humidity, and VPD data. Input target figures to help your grow tent approach and maintain your ideal environment. Stay on top of what's happening in your grow space using alerts and notifications so you can quickly counteract any environmental spikes.

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_of_alternating_current


Amperage: 5 A


Min Temperature Setting: 15 °C


Max Temperature Setting: 140 °F


Brand Name: AC Infinity


Model Number: AC-SFT3


UPC: 819137024489


Included Components: Detachable Extended Hosing, Sensor Probe, Smart VPD and Temperature Controls


Item Type Name: Environmental Plant Heater


Manufacturer: AC Infinity


Item Dimensions D x W x H: 5.94"D x 11.49"W x 12.12"H


Item Weight: 4.22 kg


Color: Black


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Jul 31

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.

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Top Amazon Reviews

    • Elegant and sturdy - Quality I expect from AC infinity
Size: 530W, VPD Temp Controller
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. ... show more
Reviewed in the United States on August 17, 2025 by Micheal P. Kloppel
    • Reliable Performance Backed by Excellent Customer Support
Size: 530W, VPD Temp Controller
I’ve been using the AC Infinity THERMOFORGE T3 Environmental Heater, and it’s been a very effective and reliable addition to my setup. It does a great job maintaining consistent temperatures without constant adjustments, which makes a big difference when you need a stable environment. Once it’s set, it runs smoothly and efficiently. The overall performance is impressive—it heats quickly and keeps everything right where it should be. The unit itself feels well-built and designed to last, which adds to the confidence in using it regularly. I did receive a defective unit initially, which was frustrating, but the experience with customer service completely turned that around. AC Infinity handled the replacement quickly and with zero hassle. The process was straightforward, and I had a working unit in no time. Between how effective the heater is and how responsive their support team was, I’d definitely recommend this product. ... show more
Reviewed in the United States on April 17, 2026 by Owen
    • Awesome for tents or rooms
Size: 530W, VPD Temp Controller
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. ... show more
Reviewed in the United States on February 26, 2026 by PStan
    • Fuego
Size: 530W, VPD Temp Controller
Works and looks great, keeps the tent at a stable temperature during the cooler evenings. Good airflow into the tent.
Reviewed in the United States on July 13, 2026 by Taylor Young
    • The auto feature
Size: 530W, VPD Temp Controller
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 ... show more
Reviewed in the United States on December 31, 2024 by Rick
    • Safe and sound indoor tent heater
Size: 530W, VPD Temp Controller
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
    • Nice Little Tent Heater
Size: 530W, VPD Temp Controller
This tent heater enabled me to do a winter grow in my unheated basement, in Maine. The combination of the heater and the lights enabled me to keep the temp around 75 degrees. With the lights off, the heater could keep the tent around 60. Luckily, with autoflowers, i only kept a couple hours of "night." The amount of control settings on this heater are incredible. A little confusing at first, but once you use it, it is pretty self explanatory. I hook it up with rhe 69 pro controller, so I can monitor and adjust the heater remotely. The tent size is 42x42 inches. The basement temp is around 45 degrees. ... show more
Reviewed in the United States on April 1, 2026 by Kevin Cox
    • Very nice little heater.
Size: 530W, VPD Temp Controller
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! ... show more
Reviewed in the United States on February 11, 2026 by Robert Bergquist

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