Mechanical · IRC 2021 §M1411.2
Cooling Coil in Furnace Supply Plenum
Upflow furnace schematic: a cooling coil sits downstream of the heat exchanger in the supply plenum, with a blower rated at least 0.5 in w.c. unless the furnace is listed and labeled for coil use.. Referenced to IRC 2021 §M1411.2.
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