Water Heaters – If you're going to buy a hot air furnace then you'll have two choices for hot water. 1. Traditional gas water heater/storage tank. 2. On-Demand gas water heater. We use a LOT of on-demand boilers today including ones that are used to do both domestic hot water and hot water for the radiators and radiant heat.
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Jan 02, 2018 · I have a old 1939 sandstone Farm house. We installed 3 ton Fujitsu mini split with 2 floor units and 1 wall unit. The house also has a oil boiler hot water heat. The mini split keeps the house warm until the temps drop in 30's. The house has R-19 in attic no other insulation only 18 inch stone walls. The units put out warm heat when 20 degrees
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The loop will allow hotter water, stored in the top of boiler to flow naturally to lower part of the boiler. This will maintain a more even boiler temperature and reduce chance of overheating water. 2. Installing a loop will prevent boiler shock. When circulator runs cooler water from return, the line will not all dump into boiler.
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