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.
Air Conditioning Information and Diagnosis
Diagnostics chart for troubleshooting. Tips on air filters, refrigerant charging, thermostats, and operation.
Allexperts Repair Q and A
Volunteer mechanics answer questions via e-mail. Volunteers can be evaluated based on credentials and user ratings.
Appliance411.com
List of do's and don'ts for maintenance and repair.
Big Blu Manual
Tutorial illustrating step by step procedures for finding refrigerant leaks.
The Boiler Room
Forum to post residential steam related questions.
Brazing, Soldering and Welding
Tutorial illustrating step by step procedures.
BTU Calculator
Estimate the heating needs of a room, combination of rooms, or an entire home.
Buried Tanks - Home Heating Oil
Legal, environmental and technical information.
Carbon Monoxide Alert
Comprehensive site includes safe/unsafe practices, effects, detector placement, and discussion.
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