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  1. disruptoergosum

    Tankless water heater - DHW/Space Heating sizing

    Question du jour about sizing tankless water heaters (instantaneous type): Tankless water heater installed in conjunction with a hydronic heating coil in an air handler. -Tankless input: 160,000 BTU/h -Tankless output: 157,670 BTU/h -Space heating capacity (Hydronic coil with air handler)...
  2. disruptoergosum

    Heat transfer through concrete slab via electric heater

    Looking for some guidance on how to best calculate the heat generated from an electric heater that is installed beneath a concrete slab. It's 275 W/ft heater (7 ft long) 347 V, 5.76A electric baseboard heater that was installed beneath the slab (sits about 8 inches beneath it on some mounting...

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