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 Jul 31 - Aug 5

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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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4.3 ★★★★★
Based on 23 reviews
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A
Verified Purchase
AuntBerBer83
Cuba, US
★★★★★ 3
Small but Functional
Small, but works for what little bit of jewelry I wear!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 12, 2025
N
Verified Purchase
niresha allen
Phoenix, US
★★★★★ 5
Awesome
Organization is good fit for all my jewels
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 26, 2026
L
Verified Purchase
lyric
Grantham, US
★★★★★ 5
So cutie
Color: Cloud White, Material Type: Paper, PU
This is a bit large for a travel size jewelry box lol I really thought it was going to be a bit smaller than what it was. I can see why some of the ladies in the comments are saying they’re using it as their main jewelry box since they don’t have much jewelry for a standard sized jewelry box. With that being said, it’s cute and CAN be small enough for travel. It fits a lot and I got this one in particular bc I like that it has a bigger lower compartment for larger pieces. It’s a nice quality travel jewelry box. It’ll fit my needs. But if you have a knack for packing small and you value space. I’d say skip on this one or do due diligence to double check the measurements to see if it’s something you’re okay with packing.
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Reviewed in the United States on January 31, 2026
D
Verified Purchase
Deena M
Birmingham, US
★★★★★ 5
Good value
Color: Jelly Pink, Material Type: Paper, PU
This is a great jewelry box for travel or to just keep at home. Very stylish and holds more than it looks like it would.
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Reviewed in the United States on February 10, 2026
C
Verified Purchase
Chavely
Port Orchard, US
★★★★★ 5
CUTE
Color: Cloud White, Material Type: Paper, PU
I absolutely love this jewelry organizer! The 2-layer design gives it plenty of space without being bulky, making it perfect for travel. I was able to neatly store my earrings, necklaces, rings, and bracelets without anything getting tangled. The interior is soft and protects my jewelry really well, and the compartments are thoughtfully designed to keep everything in place. The compact size fits easily in my suitcase or handbag, which is a huge plus. The cloud white color looks elegant and makes it feel like a great gift option too. Overall, it’s practical, stylish, and very convenient for keeping jewelry organized on the go. Highly
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Reviewed in the United States on April 20, 2026

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