How to Choose the Right Webasto Heater for Your Boat


To choose the right Webasto heater, match the heater’s output to your boat’s interior volume and usage. The Webasto Air Top 2000 STC is ideal for boats up to 28 feet (8m) for weekend cruising. For larger vessels up to 45 feet (13m) or for year-round liveaboards, the Air Top Evo 40 or Air Top Evo 55 provides the higher heat output and airflow required


Webasto Air Top Series: Comparison At A Glance

Webasto Air Heaters: FeaturesAir Top 2000 STCAir Top Evo 40Air Top Evo 55
Max Heat Output2.0 kW4.0 kW5.5 kW
Best ForBoats up to 28ft (8m)Boats 28ft – 40ftBoats 40ft – 50ft+
Fuel Consumption0.12 – 0.24 l/h0.18 – 0.49 l/h0.18 – 0.67 l/h
Ideal UsageWeekend cruisingAll-season cruisingLarge cruisers/Liveaboards

Air Top Heater – Installation Example



Webasto Heater Installation FAQs

How Long Does A Webasto Heater Installation Take?

A professional Webasto installation typically takes one to two days, depending on the number of outlets and the complexity of the ducting routes. While a basic “unit replacement” can be done in a few hours, a full new system requires careful routing of fuel lines, exhaust hull fittings, and BSS-compliant lagging.


Are Webasto heaters Boat Safety Scheme (BSS) compliant?

Yes, provided they are installed using genuine marine kits. To pass a BSS inspection, the installation must feature fire-resistant fuel lines (ISO 7840), a gas-tight stainless steel exhaust with a swan neck, and proper ventilation. JPC Direct only installs BSS-specified kits to ensure your vessel remains safe and insurable.


What is the warranty on a new Webasto marine heater?

When supplied and installed by an Authorised Webasto Partner like JPC Direct, your heater receives a full 3-year on-board warranty. This is a significant advantage over “supply-only” or self-installed units, which typically only carry a 2-year parts warranty and do not cover the labor costs of an engineer visiting your boat.


How often should I service my Webasto boat heater?

If it ain’t broke, don’t fix it.

We tend to approach this as a repair, when necessary, rather than a “service”.

If your heater is working as it should, then continue to use it normally.

If you live aboard your boat, however, and the heater is in constant use, then you might consider a yearly service, ideally before the autumn season begins.

Regular maintenance prevents the most common Webasto issues, such as carbon build-up on the glow plug or “sooting” caused by old fuel, ensuring the unit starts reliably on the first frost of the year.

Find details of our 3-Step Heater Servicing >

Heater installations in Norfolk and The Broads


If required, we can carry out the entire installation from beginning to end, from initial assessment and specification – according to your specific boat and requirements – to the completed installation.

It’s worth remembering that there is no “one size fits all” solution to installing an air heating system.

It is really important to tailor the installation to your specific needs, and install a system that produces optimum heat in the most efficient and economical way.

With years of experience, we are always on hand to give you the best advice.

We work mainly across the Norfolk Broads area, and occasionally, slightly further afield.



The “Supply Only” Option


Alternatively, if you are planning to install the system yourself, or you are outside our “catchment area”, we can supply everything you need to complete the project.

This includes the complete Webasto heater kit, warm air ducting, ducting insulation, and ducting outlets and vents. Again, we are happy to advise on what you will need for the optimum installation for you.


Nationwide Network of Engineers


We also have a network of engineers around the country who can help with your installation – so even if you are outside East Anglia, we can put you in touch with an expert who can help you get the job done to the highest standard.


Benefits of the Webasto Air Top Heater


Key benefits of the Webasto Air Top Heater

Why Use JPC Direct?


• The after-market support from JPC Direct is second to none. If you buy your equipment from us, you will receive a FULL 3-year ON BOARD WARRANTY for your heating system.


• JPC Direct only sell genuine marine kits, with all our Webasto Air Top heaters specified to BSS standards.


• JPC Direct have been authorised partners of Webasto for over a decade. This close relationship has given us the experience and product knowledge that allows us to assist and advise our customers to the highest standard.


• We are a small, friendly business that pride ourselves on the flexibility we can offer our customers.


• Honest, expert advice and ongoing support are fundamental to our business, and are the main foundations of what we do.


Contact JPC Direct…


You can contact us any time for specific advice on your installation, to ask for a quote, or to order the equipment that you need.

Give us a call on 01603 784884, or email us on the link below, and we will be happy to help.