Can active chilled beams be used successfully in overhead heating or should I still use finned-tube radiation?
Based on previous testing there are no concerns when the heat loss along the perimeter is 250Btu/lft or less. Between 250 and 350Btu/lft heating from overhead is acceptable if the warm air is directed toward the window horizontally and hits the window at a velocity of around 75 fpm. Between 350-400 Btu/lft it is sometimes acceptable to discharge the heated air from above and directly down the window. At these levels and above it is generally recommended that normal finned-tube radiation be used to address down draft concerns.
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