Drainwater heat recovery questions
Hello, I’ve been reading some things on drainwater heat recovery and came upon this article: https://www.greenbuildingadvisor.com/blogs/dept/guest-blogs/toronto-passive-some-thoughts-drainwater-heat-recovery#comment-form
In it, Lyndon Than says, “Leave at least a 12-inch run of straight drain pipe above the exchanger to smooth out the flow.”
How critical is that? I don’t have.much room to work with — about 36″ in total. I could likely get a 30″ unit in that space, but if the 12″ above is necessary, it wouldn’t be worth the trouble.
Also, why aren’t the units insulated? An insulating wrap similar to pipe insulation could increase efficiency, couldn’t it?
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