Indoor Pool Heating/Dehumidifying

[Spaceman]

Anyone help. I am based in Manchester UK. Renovating an old indoor pool at the back of my house.

Had it pressure tested which was fine.
Next step is to choose a heating system to heat the water/ heat the room and dehumidify the room too.

The vents for warm air will be in the ceiling as I have plenty room for ducting above the ceiling.

Can anybody recommend a heating engineer to help design a ducting system to
Keep the room warm and dry?

Will I need a warm air duct into the toilet and changing room ? Or just use radiators and extraction fans ?

The pool will be heated by mains gas!

[Teapot]

Sorry can't help as I am down south. Best advice is no matter what the heating engineer says, go bigger on the heat exchanger. They seem to prefer a smaller heat exchanger but a recent install for one of my customers we used a Bowman solar heat exchanger as it's around 50% larger and it was a dramatic improvement over the crappy Certikin unit we removed. That with a HE Veissmann way outperformed the old Worcester Bosch.

Use radiators in the changing room as keeping everything tight and using heat recovery ducts will work so much more efficiently.