I’ve fitted our dehumidifier. We bought it during lockdown.
It is all stainless steel and capable of removing 10 litres of water per day at 27°C. It has a built-in humidistat and is set to only come on if the humidity is outside the desired range (can be set to on or off or between 10% and 90%).
We figure it should keep the inside of the boat very nice in the boatyard. However, what we really hope is that we can extend the life of electronics, clothes and food if we can keep the boat drier while cruising. You don’t have to save all that many things from mould, mildew or corrosion to recover the £640 purchase price.
It does give off warm dry air (a nice feature normally in the UK, less so in the tropics) into the cabin. The “waste” is warm damp air (like a tumble drier). We have chosen to have this blow into the cockpit, at least for the moment, hoping this minimises the chance of sea water getting into it.
We will see how well it works, I’m tempted to put one in the forward heads where we will shower and dry clothes.