$157.45
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Autoterm Air 4D 12V marine diesel heater kit
Heat larger boat and yacht cabins with the Autoterm Air 4D, a 12V marine diesel air heater delivering adjustable 1.0–4.0kW output. Its 70–168m³/h warm-air flow gives a marine installer useful capacity for cold, damp New Zealand conditions.
This is the custom single-outlet marine kit. It includes the Comfort Control panel, warm-air ducting, two vents and stainless marine mounting and exhaust fittings. It is not the RV kit, heater-only unit or Autoterm's full multi-outlet large marine set.
What is included
- Autoterm Air 4D 12V diesel air heater
- Autoterm Comfort Control panel
- Standard installation kit and fuel intake
- 1 metre of warm-air ducting
- One floor plate
- Two cabin vents
- Bendable stainless steel marine mounting bracket
- Stainless steel marine exhaust adapter
Fuel tank not included. Optional RVD638 and RVD639 fuel tanks are sold separately.
Key specifications
| Supply voltage | 12V DC |
|---|---|
| Fuel | Diesel to EN 590 |
| Heating output | 1.0–4.0kW |
| Warm-air flow | 70–168m³/h |
| Electrical consumption | 10–57W |
| Fuel consumption | 0.12–0.51L/h |
| Heater dimensions | 402 × 157 × 188mm |
| Heater weight | 5.5kg |
| Warm-air duct size | 90mm minimum to the first branch |
| Controller | Autoterm Comfort Control |
| Warranty | 2 years |
Choosing the right marine heater
Autoterm rates its Air 4D marine configurations for boats and yachts up to 48ft / 15m. Vessel length is only a starting point. Cabin volume, insulation, glazing, cruising climate and duct layout all affect the heat required, so confirm the design with a marine heating installer before ordering.
For a smaller cabin or lower heat demand, compare the Autoterm Air 2D 12V marine kit. For a caravan or motorhome installation, compare the Autoterm RV diesel heater kits.
Marine installation notes
- Installation must be planned and completed by a suitably qualified specialist in accordance with the current Autoterm instructions.
- Protect the heater and combustion-air intake from water ingress, including spray and overboard water.
- Route the combustion-air intake, exhaust, fuel line and electrical wiring with the required clearances.
- Maintain an uninterrupted 12V supply while the heater completes its shutdown and purge cycle.
- Use at least 90mm warm-air ducting up to the first branch to avoid overheating and heater damage.
Need help comparing marine heater sizes or checking the package contents? Talk with the Select Caravans team in Auckland before ordering. NZ-wide delivery is available.
Frequently asked questions
What makes this the marine kit?
It adds the stainless marine mounting bracket and exhaust adapter to the heater, installation components, Comfort Control panel and single-outlet warm-air package.
Is this Autoterm's full large marine set?
No. This supplier-configured kit has 1 metre of ducting and two vents. Autoterm's full large marine set is a different multi-outlet package with 5 metres of ducting and additional distribution fittings.
Is a diesel fuel tank included?
No. Compatible RVD638 and RVD639 fuel tanks are optional and sold separately.
Which controller is supplied?
The supplier-listed package includes the Autoterm Comfort Control panel.
