Flexia
Well-known member
Well Fall is upon us and I need to get my building in heat for this winter. I need help with figuring out what pump to run for my setup. The building is 26x40 I have 4 loops at about 250ft each. Found a good deal on a navien CH-210 combi boiler with outdoor reset and I hope its not to big. I was looking at the Grundfos ups15 or will that be overkill?