Some pretty good free residential HVAC study guides

kshepard · March 5, 2020, 1:16am

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.

jdepiero · March 5, 2020, 1:47am

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

kshepard · March 7, 2020, 5:09am

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