The purpose of this publication is to provide accurate and useful information for home inspectors in order to perform an inspection of the heating, ventilation, and air-conditioning (HVAC) system at a residential property. This manual covers the components of common residential HVAC systems, including: warm-air, hydronic, steam and electric heating systems; air-conditioning systems; and heat-pump systems. This guide also refers to the InterNACHI Residential Standards of Practice with regard to recommended inspection protocols. For more information, visit www.NACHI.org. Authors:Ben Gromicko, Director of Education, International Association of Certified Home InspectorsNick Gromicko, Founder, International Association of Certified Home InspectorsGraphics: Lisaira Vega, Levi Nelson, Erica Saurey, Cherise Peterson & Chris KrowiakEditor:Kate Tarasenko / Crimea River, LLCLayout & Design: Jessica Langer121 pages