To blow toasty hot air all over me
Its just takes heat from the engine and pumps it wherever you want. makes a surprisingly large difference. I woudl never have believed it until I had one in my last boat... now I won't roll without out.
For £380'ish quid (Cheaper to you guys cos I'm a nice guy :wink: ) its a worth while investment.
Plus, unlike most boats, I found a super stealth place to hide the heater core so it'll be totally hidden and tucked away. Finishing off this morning....