AC-Pal - Software allows input of data from instrument readings and gives solution to the problem. Definition and help section provides additional information about concepts and functions. Demonstration version available..
HeatingHelp.com - Find answers to steam heating problems by posting questions for experts or reading excerpts from books about heating..
Home Ideas - Order form to request free literature on new units and related products..
Honeywell - Devices include thermostats, humidistats, air cleaners and humidifiers. Everything from manuals to troubleshooting guides to programming instructions to product support..
Howstuffworks.com - Article that describes air conditioning operation from window units up to large industrial applications..
HVAC Glossary - Consumer guide to the array of efficiency ratings, abbreviations and acronyms used to describe or explain the products..
HVAC Mechanic - Information and support on heating, ventilation and air conditioning systems or controls for home owners and professionals. Knowledge base, recalls, forum, glossary, and events..
HVAC-Talk - Software bulletin board for HVAC contractors, home-owners, do-it-yourself enthusiasts to use for heating and air conditioning concerns..
John Mills Work Page - Advice from a service manager on buying a new unit, illustrated essay on chimney liners, and a history of brand names..
Learn Ductwork - Illustrated tutorial on fabricating sheet metal ductwork..
National Refrigerants - Technical support and regulatory updates; articles, faq, and news..
Ontario Propane Association - Liquid propane gas serviceman's handbook. Installation and inspection instructions..
RCD Mastics - How to locate, repair, and seal ductwork..
Recalls - Searchable database provided by Consumer Product Safety Commission..
RepairNet - Flat rate price guide for checking repair costs..
Sound Home Resource Center - In-depth articles on topics related to improvement, care, and maintenance..
Space Conditioning Systems - Instructions on maintenance procedures for heating systems. Includes drawings and diagrams..
Warmair.com - Information on heating system operation, components, troubleshooting and maintenance..