This Guide provides homeowners and HVAC contractors with general information on completing high-efficiency furnace retrofits. It provides an overview of key steps involved in the furnace retrofit process including pre-changeout, installation, commissioning, and education and maintenance. Additionally, common challenges encountered by HVAC contractors during furnace installation are covered with suggested solutions for overcoming these barriers discussed. This publication is not intended to replace residential furnace installation training materials developed for HVAC contractors.


This publication was developed through consultation with many individuals and organizations involved in the residential furnace industry. This Guide would not have been possible without the support and guidance of FortisBC, the Province of British Columbia, the Thermal Environmental Comfort Association (TECA), the Heating, Refrigeration, and Air Conditioning Institute of Canada (HRAI), and Energy Star®. This Guide was prepared by RDH Building Science Inc. and Ecolighten Energy Solutions Ltd.


While care has been taken to confirm the accuracy of the information contained herein, the authors, contributors, funders, and publishers assume no liability for any damage, injury, or loss that may be incurred or suffered as a result of the use or reliance on the contents of this Guide. The views expressed here do not necessarily represent those of any individual contributor.