- Duct Cleaning
- EPA tips on how to determine if ductwork needs cleaning. Criteria for choosing a contractor.
- 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.
- Find answers to steam heating problems by posting questions for experts or reading excerpts from books about heating.
- Article that describes air conditioning operation from window units up to large industrial applications.
- 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.
- Sound Home Resource Center
- In-depth articles on topics related to improvement, care, and maintenance.