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Family enjoying ice cream onboard boat

The debate rages on. Which is best: air cooling or water cooling for marine refrigeration systems?

A refrigeration system doesn’t “make cold”, it removes heat from one area and transfers it to another. There is actually no such thing as “cold”, just heat at different temperatures: cold heat, warm heat, hot heat, etc.

In our small marine refrigeration systems, this heat transfer is accomplished using a compressor and a refrigerant to collect heat from inside an insulated space and disperse it somewhere else via the magic of latent heat. The evaporator is the “heat collector” inside the insulated box while the condenser is the component that disperses that heat elsewhere. While the evaporator is specific for the size and configuration for the application, there are choices to be made regarding condensers and the medium they disperse the heat into.

But first, let's watch a demonstration of how a Frigoboat Keel Cooler System works in extreme tropical water conditions. Then we will discuss how this can be.

Air Conditioner Flicka20 Sailboat

18 Helpful Tips to install air-conditioning on your boat

As a lad I once took flowers to a girl I fancied when visiting her in hospital. Her mother shook her head and immediately removed them from sight, just as the poor thing in bed started sniffling and sneezing. How was I to know that she suffered from hay fever?

I once accidently filled an almost empty 40 gallon diesel tank with water on a sailboat after a race. No fun for me that night, having to drain and dispose of that much stinky, milky water in the exclusive playground of Puerto Cervo, Sardinia. I blame the boatbuilder for not putting the filler in the wrong place.

Mistakes. We all make them. Some more than others ...

So, when contemplating the installation of an air conditioning system on a boat, it’s well worth taking time in the planning stages to minimize the possibility of mistakes, because inevitably some will happen. Installing air conditioning on a boat as an after-market exercise is about the most invasive and disruptive thing you can do to your floating dream palace, and there are few short-cuts available when doing it correctly.

However, there are a number of logical steps you can take, and many potential pit-falls can be identified during the planning stages.

Reliable and Affordable DC air-conditioning options

Endurance-in-ice-packIt seems that there’s an ongoing quest in some circles for the holy grail of boating comfort: DC air-conditioning, either 12v or 24v. Yet few seem to be aware of the more practical, but far less complex and expensive alternative - 115v AC air-conditioning powered by batteries through an inverter.

An inverter is a device that changes battery power into the mains power that you have in your home or the shore power on your boat. So many boats these days already have inverters installed, many of which will be combination inverter/chargers, and there’s a wide range of inexpensive models available that are suitable for powering small marine air conditioners.

coast guard rescue man on boat 1
It’s funny what one finds to do to occupy oneself during isolation. The house got a very thorough spring-clean this year, and the garden looks better than ever, although a long way from Gardener’s World standards. I check often, but I’ve never found my fingers to be even slightly green, just a yucky shade of dirt brown. I shouldn’t be allowed to grow roses as I do them a huge injustice, but there are signs of a reasonable bean harvest this year for a change. But still, there have been times of boredom and onset of isolation blues.

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