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How many BTU radiation for kitchen

I am renovating my kitchen, which is 10’ x 15’ with 8.5 feet ceilings. We had to remove the door to the basement stairs to make the layout work. Two low-E windows and a outside door. Walls are R-11. Will use a Runtal wall radiator, but it won’t be on an outside wall, for lack of space. How many BTUs of hydronic radiator should I install? I am in Denver.

Steve from Denver, CO


  • Ironman
    Ironman Member Posts: 7,379
    30 btus per sq. foot would probably be enough, but that's a rough estimate.

    You can down load SlantFin's free app and calculate it.

    Also, be aware that the Runtal is low mass and won't have the same heating characteristics as high mass cast iron rad's would, regardless of btu rating.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.