I just finished reading the book Unconformed, by Bryan Orr, from HVAC School. I invested about 5 hours spread over three days and let me...

(This image is courtesy of our friend JD Kelly @student_of_hvac) In this refrigerant flow diagram, we see a simplistic piping arrangement...

(This image is courtesy of our friend JD Kelly @student_of_hvac) This drawing shows how a low voltage wiring circuit can control a high...

Why do older coils seem to last a long time but ones that are only 10 or 15 years old leak? Energy transfer efficiency was not as much of...