Hydronic Heating
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Where to Install the Heat Source in a Radiant Floor
In a whole-floor system, should the tubing be integrated with the rebar, or embedded in a topping slab?
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Open-Loop vs. Closed-Loop Ground Source Heat Pumps
Some basics on the two types of GSHP systems and cautionary advice against a side-by-side comparison
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Air-to-Water Heat Pump Retrofit
A mechanical engineer shares lessons learned after replacing his propane boiler with an air-to-water heat pump to heat his home
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Boilers Don’t Boil
Nearly all boilers used for residential heating just make hot water, not steam
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Using a Tankless Water Heater for Space Heat
Although the concept seems simple, it’s tricky to design a trouble-free system