Autoterm 4D Diesel Heater

Autoterm 4D Diesel Heater – 4kW Professional-Grade Diesel Air Heater

The Autoterm 4D Diesel Heater is a premium European-engineered diesel heater from Autoterm's proven Air series — a step up from entry-level diesel heaters in build quality, reliability, and service life. At 4kW maximum output with a 168m³/h hourly air volume, it heats suits large caravans, motorhomes, trucks, and boats up to 15m.

The brushless induction motors mean extremely low noise, long operational lifespan, and reliable performance in extreme conditions down to -45°C. This is the heater for buyers who want assured quality and don't want to compromise.

Key Features

• 4kW Maximum Output 168m³/h of hot airflow per hour — heats large spaces quickly

• Brushless Induction Motors Low noise, long service life, extreme environment capability

• Operates to -45°C Reliable performance in any New Zealand condition

• Economical Fuel Use Only 0.51L/h at maximum — excellent efficiency for the output

• OLED Control Panel Clear, easy-to-read display with intuitive controls

• 12V DC Operation Low electrical draw — suitable for solar/battery setups

• Complete Installation Kit Heater, control panel, fuel intake, 1m ducting, floor plate, 2 vents

Add to cart — premium diesel heating built to last.

Brand: Autoterm

Voltage: 12V DC

Fuel Type: Diesel

Heating Power: High: 4kW / Low: 1.0kW

Air Volume: High: 168m³/h / Low: 70m³/h

Power Consumption: High: 57W / Low: 10W

Fuel Consumption: 0.51L/h (maximum)

Heater Weight: 5.5kg

Dimensions: 402×157×188mm

Kit Includes: Heater, OLED control panel, installation kit, fuel intake, 1m ducting, floor plate, 2 vents

What type of caravan heater is best?

Diesel air heaters are popular for efficient off-grid heating, while gas and combi heaters are ideal for integrated caravan systems.

What is a diesel caravan heater?

A diesel heater burns diesel fuel to produce warm air, making it highly efficient for caravans and motorhomes.

Are diesel heaters safe to use in a caravan?

Yes, when installed correctly with proper venting and safety clearances, they are safe and widely used in RVs.

Do diesel heaters use a lot of power?

No, they use very little 12V power for the fan and electronics, making them suitable for battery systems.

What is the difference between 2kW and 5kW diesel heaters?

2kW units suit smaller caravans, while 5kW heaters are designed for larger spaces or colder conditions.

Do diesel heaters need a fuel tank?

Yes, most require a separate diesel fuel tank or connection to a suitable fuel supply system.

What is a combi heater?

A combi heater provides both space heating and hot water in a single integrated unit.

Are gas heaters still used in caravans?

Yes, LPG gas heaters are still used, especially in integrated systems like Truma units.

Can I install a caravan heater myself?

Basic kits can be DIY installed, but professional installation is strongly recommended for safety.

Which heater is best for off-grid camping?

Diesel heaters are generally the best option for off-grid use due to low power consumption.