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.
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
Safe and unsafe practices, effects, detector placement, and discussion.
Carbon Monoxide Poisoning
EPA site provides advice on CO detectors, poisoning symptoms and prevention.
Carbon Monoxide Protocol
Guidelines to determine whether potential exists for this deadly gas to enter a house.
Duct Cleaning
EPA tips on how to determine if ductwork needs cleaning. Criteria for choosing a contractor.
Furnace Blower Repair
Short example on replacing bearings and fan belt.
Hannabery HVAC
Everything from troubleshooting to maintenance and repair.
Hearth.com
Information on gas, wood, pellet, and coal appliances. Cost comparison of the different fuels.
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