Heat Pipes
Fact sheet illustrates the theory and operation. Add-on device for air conditioner to improve de-humidification.
Heating System Maintenance
Tips on preparing a furnace for winter operation.
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 Stories at Old House Web
Advice geared toward historic or older homes.
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.
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