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 Sep 9 - Sep 14

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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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Cindy Michelle
Waukegan, US
★★★★★ 1
Not Cherry Fragrance - Does not Smell good
Flavor Name: Cherry Seed Oil
The package was perfect, but the content not. The oil has a sticky texture and does not smell as cherry at all. They don't show the real ingredients the oil contains. It is just a mix of different oils but no cherry fragrance at all. It does not smell well. I did not return it because it could not be returned. Not worth the money.
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Reviewed in the United States on June 30, 2025
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Yami
Charlottesville, US
★★★★★ 5
The best quality and most reliable diaper for toddlers!
Size: 4T-5T, Unit Count: 99
So far Huggies Pull-Ups have been the best for our toddler before we venture out of diapers! The quality is impeccable. Now when it comes to size, I preferably go up a size for our toddler, they seem to fit better and give my toddler comfort. These pull ups will last throughout the night without any leakage and we’ve had very few to none rashes. Also one of my favorite thing about the Huggies Pull-Ups is the way they make it easy to put and take off with the option of either literally pulling up which helps get these toddler’s ready for under garments but it also comes with the side attachments. So what put these on however works best for you!
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Reviewed in the United States on September 21, 2025
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Claire
Phoenix, US
★★★★★ 5
Great diapers
Size: 4T-5T, Unit Count: 17
These pull-ups are great. They’re very soft and have a cute little Minnie mouse print on them. They’re great for the price. Luckily my daughter only needs them for bedtime, but they’re great because she can put them on and pull them up by herself. The brand is great, I’ve never had an issue with this brand before.
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Reviewed in the United States on April 14, 2026
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Travis
Fort Morgan, US
★★★★★ 5
Awesome. Kid loves them
Size: 4T-5T, Unit Count: 99
Great. i love how i don't have to rip them. there is Velcro on the sides to pull off. and they fit great
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Reviewed in the United States on April 22, 2026
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Paige
Waukegan, US
★★★★★ 5
Our Go-To Pull-Ups for Potty Training
Size: 2T-3T, Unit Count: 124
We’ve tried a few different brands during potty training, and we always come back to Pull-Ups. They fit my daughter really well, are easy for her to pull up and down on her own, and hold up great overnight without leaking. The sides tear easily for quick changes, which is super helpful when you’re out and about. The designs are also cute and helped make potty training a little more exciting for my toddler. Definitely a staple in our house during this stage!
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Reviewed in the United States on May 12, 2026

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