1592953269000 1312632483000 term-41763 1616541475200 1312632534000 1616290413724 adlib fitz-online adlib-term-41763 c61f0210-e65c-3949-b8ca-3d007719740b 2 1 scope note Systems that use motor-driven fans or blowers to distribute heated air. V.PC.ALO.AFU.AXC.ARI.BIQ.AFU 1 code V.PC.ALO.AFU.AXC.ARI.BIQ.AFU 1 forced air heating reference term-41789 adlib-term-41789 a8cdf9d3-db8f-3685-af5a-26d844039b32 warm air heating forced air heating term