Some pretty good free residential HVAC study guides

I found these through Carrier University:

Very detailed with good illustrations.
Click the down arrow in the upper left corner to download and add to your library.

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Very nice addition to my library Kenton. Thanks for sharing!

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Carrier has some great HVAC publications but they have to be purchased through a Carrier distributor.

CRC-12268-CUTechTrainingCat2019Upd_R7.pdf (666.4 KB)