heating & cooling registers grilles & vents
cengage learning 5004791 dewalt hvac master edition
topics such as refrigeration systems piping ductwork motors compressors fans pumps and more features practical troubleshooting techniques and service call procedures for understanding and maintaining all heating and cooling systems includes safety coverage and plan symbols materials and conversion factors paul rosenberg fiber optic association american contractors educational services first edition 768 pages item weight 1 lb sku orgl28377