What size heat exchanger do you think I should run for a water to air system? I'm going to install this due to space restrictions, instead of the more common air to air.
I can probably save a bit of money by getting a second hand heater matrix These are common as butterflies and just as cheap. Though possibly a bit smaller...
There is a good looking matrix that measures 26 x 14 x 2 cm though I feel it may be a bit slim for my application, though I could be wrong.