The Autoterm 4D (formerly the Planar 44D) is a robust 4kW diesel air heater, engineered for medium to large vessels and yachts up to 48ft (15m). It is a high-performance, cost-effective alternative to larger brands, offering exceptional reliability and the ability to heat multiple cabins or large open-plan saloon areas efficiently.
Autoterm 4D: Versatile and Powerful Forced-Air Heating
With a powerful 4kW heat output, the Autoterm 4D is capable of moving a significant volume of air, making it ideal for narrowboats, widebeams, and multi-cabin cruisers. Its design prioritises low fuel consumption and minimal electrical draw, ensuring that it remains an efficient primary heat source for long-term living or extended cruising.
Standard features of the Autoterm 4D kit include:
- High-Grade Components: Supplied with a “super quiet” fuel pump and an air intake silencer to ensure operation is as unobtrusive as possible.
- Marine-Ready Hardware: Includes a 316 stainless steel mounting plate as standard, providing the necessary corrosion resistance for the marine environment.
- Flexible Control: The kit comes with the basic PU-5 controller, which can be upgraded to the digital Autoterm Comfort Controller or the Smartphone Modem for remote heating management via the Autoterm app.
Professional OFTEC-Trained Installation
Proper installation of a 4kW diesel heater is vital for safety, particularly concerning the integrity of the exhaust system and the correct routing of fuel lines. At Marine Heating Solutions, our engineers are OFTEC-trained and highly experienced in Autoterm 4D marine installations. Every installation we carry out is designed to meet or exceed Boat Safety Scheme (BSS) standards.
Upon completion, we provide a Boat Diesel & Oil Appliance Certificate, which is required for insurance and BSS compliance. For technical manuals and official support, you can visit the Autoterm Global Support Center or review the OFTEC consumer guide for liquid fuel appliances.
Basic Kit Includes:
| Diesel Air heater PLANAR-4D |
| Stainless steel 316 mounting plate x 1 |
| Super Quiet Fuel Pump |
| Mounting plate x 1 |
| 1 meter of exhaust tube |
| Fuel dip fuel tube x 1 |
| Power cable with integral fuse box x 1 |
| Control panel cable x1 |
| Fuel pump power cable x 1 |
| Silencer air intake x 1 |
| A selection of nuts and bolts x1 |
| Basic PU-5 Controller |
Autoterm 4D Diesel Air Heater Price:
£599.00
Optional Extras:
- Autoterm Comfort Controller
- Autoterm Smart Phone Modem
- Marine Exhaust
- Exhaust Hull Fitting
- Marine Fuel Filter With Stop Tap
- Header Tank