For your size pool, we would recommend a 140,000 BTU heat pump, such as the Jandy EE-Ti 140,000 BTU Heat Pump, 6.1 COP, 410A, 230V/60Hz/1 Phase, Heater, Titanium, Digital. The EE-Ti heat pump can save you up to 80% on energy costs when compared to a propane heater.
What is a Roofing Cap Sheet. Used in low slope roofing such as built-up roofing (BUR) or modified bitumen roofing, a cap sheet is used to create a water-tight surface. Constant exposure to wind and weather can cause a BUR roof to become brittle and crack, then water can seep into the cracks, eventually working into the interior of the building.
Attribution: Piergiuliano Chesi. A saddle roof is a roof form which follows a convex curve about one axis and a concave curve about the other. The hyperbolic paraboloid form has been used for roofs at various times since it is easily constructed from straight sections of lumber, steel, or other conventional materials.