The Webasto Air Top Evo 55 is a high-performance diesel air heater specifically designed for larger marine vessels up to 50 feet. As the most powerful model in the Air Top range, it is the ideal choice for offshore yachts, large narrowboats, and commercial craft that require significant heating capacity and rapid warmth distribution in extreme conditions.
Webasto Air Top Evo 55: Maximum Marine Comfort
Delivering a formidable 5.5 kW of heat output, the Air Top Evo 55 is engineered for efficiency and silence. Its advanced control system allows for precise temperature regulation, ensuring the cabin remains comfortable without the “on/off” cycling common in lesser units. The heater features a “boost” mode for rapid initial heating and an automatic altitude adjustment to maintain clean combustion at varying heights.
Like the Evo 40, the Evo 55 includes the Webasto MultiControl digital interface. This allows you to set timers, manage fan speeds, and switch between heating and ventilation modes with ease.
Professional Installation and BSS Safety
Our OFTEC-trained engineers provide expert Webasto Air Top Evo 55 installations, ensuring that every system meets the high safety standards required for the marine environment. We use marine-spec, room-sealed exhaust systems and insulated hull fittings to guarantee full Boat Safety Scheme (BSS) compliance. For technical support, we recommend consulting the Webasto Corporate Technical Portal or the OFTEC consumer guide.
Free Installation Offer Winter 2025/2026
We are offering free installation for all diesel heater narrowboat kits between the 15th of November 2025 and the 15th of February 2026. See individual appliance listing for boat stove kit prices. Email us for details.
Webasto Air Top Evo 55 Narrowboat Kit:
£2445.00 including free installation Winter 25/26
The Air Top Evo 55 kit includes:
- Air Top Evo 55 Diesel heater
- Stainless steel mounting bracket
- Complete wiring harness
- Webasto MultiController
- Fuel pump
- Copper fuel line and hose connectors
- Stainless steel room sealed exhaust system, complete with silencer and lagging
- Insulated stainless steel through-hull skin fitting
- Diesel Appliance Safety Certificate