I don't know what you mean by air heat exchanger... But heating a shed with your filter in it is a very poor way to heat a pond. You want to heat the water as directly as possible. .......You are welcome to come and see the koi and "others" just let me know when.I was thinking of using an air heat exchanger and keeping in my shed and keeping the shed heated in the winter.
I knew u kept koi but i didnt know it was on this level lol
Would love to see all this in person someday
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Ah a heat pump. Might work ok. You would not want in a shed with your other equipment as it cools the air around it. I like that it has a titanium heat exchanger,most SWIMMING pool heaters are TOXIC to fish.I prob dont have the term right but heres wht i was thinking of. My dad uses thes on his pool.
http://www.poolheatpumps.com/Rome_Industries_Solarium.htm
u mean like 60 ft longAwesome looking pond -
I'm guess the dimensions are something like - 30' long x 12' wide?