THE PBO SOLUTION
Air conditioning on small yachts has now become very affordable, costs partly driven down by the automotive market where almost all modern cars now have AC built in.
A small, fixed unit suitable for a 25-35ft boat can be installed in the main cabin or sleeping area providing there is some spare locker space and a handy condensation drain point. Power can come from shorepower, a genset or inverter via renewables.
For a temporary mainspowered solution, Cruiseair Dometic’s Carry-On 7020 is designed to fit in a standard boat hatch, and run on shore power (or the boat’s 240V if you have it). Other boat owners simply use a household stand-alone unit when in port.
Small 12V or 24V portable units are available which run air over a reservoir of water for a cooling effect, one example being the Australian Transcool which runs almost silently off battery power consuming just 1A. It costs around £350 and is made from GRP and marine grade stainless steel.
Cheaper still are simple hacks to keep the boat cool naturally. These include putting reflective film over the windows, installing window blinds, adding large tents or adapting sails, fitting a lot of fans, and having temporary hatch covers to reflect the heat.
And don’t forget all that lovely superyacht insulation. That will help keep the boat cool too.
other ways to keep a boat cool are to fit reflective film to the windows...
transcool’s evaporative air cooler runs on 12V or 24V as well as mains
... and use a sunshade, even if it is just an old sail that’s been rigged up to do the job