25:40

Air Distribution System-2

27:04

Refrigerants-1

17:39

Ductwork sizing, calculation and design for efficiency - HVAC Basics + full worked example

10:05

Central air conditioning system working Animation

27:33

Introduction to Refrigeration

10:58

How to Calculate Ventilation Air

27:33

Psychrometric Processes-1

48:40

Air Flow Diagnostics w/ Joseph C Henderson