SKU: 10591464221

Autoterm 4D Diesel Air Heater 4kW 12V with Digital Controller

Sale price$854.53 Regular price$949.48
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Ships within 48 hours · Estimated delivery Aug 4 - Aug 9

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Description

Autoterm 4D Diesel Air Heater 4kW 12V with Digital ControllerThe Autoterm 4D Diesel Heater Turns a Freezing Cab Into Somewhere You Actually Want to Sleep 4kW Diesel Heat Heats up to 120m h 12V Fires down to 45C 3 Year Warranty It's 3am and you can see your breath. The engine's off, the little fan heater's flattened your battery, and you're lying there in every layer you packed, still cold. Idling the diesel just to take the edge off feels like a mug's game, and that cheap no name heater you tried last winter

The Autoterm 4D Diesel Heater Turns a Freezing Cab Into Somewhere You Actually Want to Sleep

4kW Diesel Heat  |  Heats up to 120m³/h  |  12V  |  Fires down to -45°C  |  3-Year Warranty

It's 3am and you can see your breath. The engine's off, the little fan heater's flattened your battery, and you're lying there in every layer you packed, still cold. Idling the diesel just to take the edge off feels like a mug's game, and that cheap no-name heater you tried last winter spat fault codes and carked it.

The Autoterm 4D sorts that for good. A genuine 4kW of dry diesel heat, sipping as little as 0.21 litres an hour, running straight off your tank and a 12V feed. Set your temperature, roll over, and wake up to a warm cab instead of a cold one.

Why Tradies & Campers Rate the Autoterm 4D Diesel Air Heater

Genuine 4kW, not eBay watts

Every unit is bench-tested cold, then run for 30 minutes to check airflow temperature, emissions and CO² before it leaves the factory. It moves up to 120m³ of warm air an hour, plenty for a big motorhome, a dual-cab cabin, a shed or a boat up to 15 metres.

Sips fuel, spares your battery

On low it draws around 10W and burns roughly 0.21 L/h. It'll run all night off your existing diesel tank without flattening the cranking battery or emptying a gas bottle.

Starts when it's brutal

Reliable firing down to -45°C, with a brushless induction motor built for the long haul. That's the bit where the cheap units quietly give up.

Run it your way

Comes with the digital controller out of the box. Add the optional modem and you can fire it up from your phone by app or SMS before you've even walked back to camp.

The whole install kit's in the box

Full one-outlet kit: fuel pump, ducting, muffler, exhaust, 10m fuel hose, brackets, clamps and the lot. No chasing extra bits to get it mounted.

Autoterm 4D Specs

Model Autoterm 4D (44D)
Heat Output 1.0 - 4.0 kW
Heated Air Volume Up to 120 m³/h
Fuel Diesel
Fuel Consumption 0.21 - 0.51 L/h
Power Draw 10 - 62 W
Voltage 12V DC
Min Operating Temp Down to -45°C
Controller Digital Controller (included)
Motor Brushless induction
Weight 5.5 kg heater / 11.4 kg full kit
Best Suited To Large cabins, motorhomes, sheds, boats up to 15 m
Warranty 3 Years

What's Included

Everything you need is in the box with your Autoterm 4D Diesel Air Heater from True Gear

  • Autoterm 4D heater unit
  • Digital controller + 1.8m cable
  • Metering fuel pump + 6m cable
  • Power cable with fuses (6.5m)
  • Muffler with mounting kit
  • Exhaust pipe (1m) + heat insulation
  • Fuel hose (10m) + standpipe
  • Air intake hose + silencer
  • Mounting base plate & brackets
  • Clamps, rings & screws
  • Air intake grille & heater vent
  • Hot air ducting (1.2m)

Not Sure Which Diesel Air Heater Suits You?

Rough rule: the 4D is the one for bigger spaces, large motorhomes, dual-cab cabins, sheds, converted containers and boats up to 15 metres. If you're only heating a small camper, troopy or tinnie, the smaller Autoterm 2D will do the job on less fuel. Not sure? Give us a bell and we'll point you to the right one for your setup.

Call Us - 03 7056 6732Email Us

Autoterm 4D Manual

Download the complete Autoterm 4D Diesel Air Heater user manual and installation instructions below for full technical details and setup.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 10591464221

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Lisa
Belleville, US
★★★★★ 5
Purple Purple!!
Size: 9ft, Color: Dark Purple, Size: 9ft, Color: Dark Purple
Looks great!! I would say the color is like Crayola marker purple. It was easy to assemble straight out of the box. And a perfect size for my six person patio table. The weight of the fabric seems of high-quality and thickness. I would recommend as it seems to be a good value for the price point..
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Reviewed in the United States on May 27, 2026
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swotr
Phoenix, US
★★★★★ 5
Great value!
Size: 9ft, Color: Dark Blue
This is a bargain for the price. Thus umbrella is well made and has a very nice fabric. It came package well and was exceptionally easy to assemble. The had crank works well and operates very smoothly. The color is vibrant and I would certainly buy this again. I'm very happy with this purchase.
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Reviewed in the United States on May 27, 2026
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Ander P
Lake Worth, US
★★★★★ 5
Vibrant backyard umbrella
Size: 9ft, Color: Lake Blue
The umbrella does its job, it tilts so you can position the umbrella to block the sun at all hours. The colors are vibrant and fabric is decent quality, I bought the turquoise this time and dark blue in the past, the fabric keeps cleans. The umbrella isn't heavy, easy to maneuver. This was a replacement for our previous umbrella which broke at the tilt joint, after a very windy day when we forgot to close it, but it lasted over a year and a half so no complaints there.
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Reviewed in the United States on December 6, 2025
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Amazon Customer
Dallas, US
★★★★★ 4
Nice Umbrella for the Price
Size: 9ft, Color: Red
Truly surprised at the quality of this umbrella. Great deal for the price. I did see some reviews prior to buying that there were issues with the tilting mechanism/crank so I am giving it a 4 until I have it for more than a few days to see how it all works out.
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Reviewed in the United States on April 27, 2026
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Wild Roots Farmstead
Grantham, US
★★★★★ 5
Honestly impressed would recommend
Size: 9ft, Color: Beige, Size: 9ft, Color: Beige
I’m honestly really impressed with this patio umbrella! It’s lightweight enough that it was easy to move and set up, but it still feels sturdy and stable once in place. The fabric material feels much nicer than the cheap plastic-like material some outdoor umbrellas use — it looks clean, durable, and gives really good shade. The color is beautiful and works perfectly with outdoor spaces without looking harsh or too bright. It opens smoothly, provides a large amount of coverage, and has held up great in the sun and wind so far. Definitely a thumbs up from me — great quality for the price and makes the whole patio area feel more relaxing and put together! ☀️👍
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Reviewed in the United States on May 9, 2026

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