Why a Diesel Heater?
If you're building or upgrading a campervan, a diesel air heater is one of the most valuable additions you can make. Unlike gas heaters that produce moisture and condensation, diesel heaters provide dry, efficient heat that runs off your vehicle's fuel supply and uses minimal battery power.
But with so many brands on the market - Autoterm, Lavaner, HLN, Max, and various Chinese alternatives - how do you choose? We've installed over 500 diesel heaters across all brands, and here's our honest comparison.
Quick Comparison Summary
Best Overall Quality
Autoterm Air 2D/4D - Premium reliability
Best Value
Lavaner Pro Max - Premium features, mid-range price
Best for Tech Users
HLN Aerodyn - Built-in Bluetooth control
Best Budget Option
Lavaner Standard - Reliable and affordable
Air 2D (2kW), Air 4D (4kW)
Including professional installation
Pros
- Best reliability and build quality
- Full manufacturer warranty
- Proven track record - thousands installed
- Comfort LCD controller included
- Excellent customer support
- Available spare parts
Cons
- •Higher initial cost
- •Bluetooth costs extra £150
Best For
Those who want the absolute best quality and reliability
2kW, 5kW
Including professional installation
Pros
- Brushless motors for longevity
- Enhanced LCD screen
- KARTT ABM Sleep Easy technology
- Premium build quality
- Excellent value for money
- Quieter operation than standard models
Cons
- •Newer brand with shorter track record
- •Limited dealer network
Best For
Those wanting premium features at mid-range price
2kW, 4kW
Including professional installation
Pros
- Built-in Bluetooth control
- Modern HLN control panel included
- Good reliability
- Competitive pricing
- Easy smartphone control
Cons
- •Less established than Autoterm
- •Fewer installation examples available
Best For
Tech-savvy users who want Bluetooth without extra cost
2kW
Including professional installation
Pros
- Excellent value for money
- Basic LCD controller included
- Reliable performance
- Good for budget builds
- Does the job well
Cons
- •Basic features only
- •Standard LCD (not enhanced)
- •No brushless motors
Best For
Budget-conscious builders wanting reliable heat
2kW
Including professional installation
Pros
- Most affordable option
- Basic LCD controller
- Perfect for testing/trying diesel heat
- Good for temporary setups
Cons
- •Entry-level quality
- •Shorter expected lifespan
- •Limited features
Best For
First-time users wanting to try diesel heating affordably
Key Factors to Consider
2kW vs 4kW/5kW
2kW heaters are perfect for standard panel vans (Transit, Sprinter, Ducato). They'll heat most vans comfortably even in -20°C conditions.
4kW/5kW heaters are only needed for larger RVs, A-class motorhomes, or if you're living full-time in Arctic conditions.
LCD vs Bluetooth Control
LCD controllers (Autoterm Comfort, Lavaner screens) are reliable, tactile, and work without a phone. Perfect for those who want simplicity.
Bluetooth control (HLN, Autoterm +£150) lets you control the heater from bed via smartphone. Great for convenience but requires a charged phone.
Installation Location Options
Behind Front Seats
Most popular. Easy access, efficient heating, minimal noise.
Under Van (External)
Saves interior space. Requires weatherproof mounting (extra cost).
Rear Garage
Good for larger vans. Needs longer ducting for heat distribution.
Our Expert Recommendation
For most campervan conversions: We recommend the Autoterm Air 2D (£850). Yes, it's more expensive, but the reliability and peace of mind are worth it when you're in Scotland in January.
Best value option: The Lavaner Pro Max 2kW (£790) offers premium features like brushless motors at a mid-range price point.
On a tight budget: The Lavaner Standard (£540) is genuinely good and will serve you well. Avoid the cheapest Chinese brands - reliability matters when it's freezing outside.
Professional Installation Matters
While some experienced DIYers tackle diesel heater installation, we strongly recommend professional fitting. Incorrect installation can lead to:
- •Exhaust leaks allowing dangerous fumes into living space
- •Fuel leaks creating fire hazards
- •Electrical faults damaging your leisure battery or vehicle electronics
- •Voiding manufacturer warranties
Our installations include proper exhaust routing, secure fuel connections, correct electrical wiring with fusing, and full commissioning. We also register warranties and provide user training.View our diesel heater installation service