This specific Webasto Airtop heater set is intended for installation into an automotive vehicle. In addition to the exhaust silencer requiring a marinised upgrade, you would also require to change the fuel line system and upgrade the heater mount plate to a 316 stainless steel version.
All very possible, but if you have a specific install in mind we could build a bespoke heater kit for you, eg, correct ducting lengths, exhaust, fuel lines, fuel filter and fuel shut off etc. This way we could put together a marine compliant system 'right out the box' so-to-speak
Please email sales@butlertechnik.com or perhaps call +44 (0)1522 243310 and ask to speak to our technical sales team
Thank you for your interest