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Exterior Doors
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Exterior doors with magnetic seals offer superior air infiltration protection. Compression seals are also good, but not to the quality of a magnetic seal. A good door will seal tightly, be low maintenance, and keep heat or cool from escaping.
Most of the energy loss associated with doors results from leakage around the door. However, a thin door with a low R-value can lose a significant amount of energy and heat directly through the door. Significant air leakage can result from poorly-fitted exterior doors. Choosing entry doors that are pre-hung with compression-type or better yet, magnetic weather-strips, and following recommended installation procedures, can increase efficiency.
Solid wood used to be the standard for exterior doors, but can be cost prohibitive in some cases. Fiberglass and metal facings reduce the amount of damage and resultant maintenance that must be performed on an outside door. The lightweight foam core of a fiberglass or metal door can have up to 5 times the R-value of a traditional solid wood door.
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Solar domestic hot water systems can operate in any climate. Accounting for the life of the systems, solar hot water heating can be a very cost-effective investment. Performance factors include the solar energy input from the site and the temperature of the incoming cold water. For obvious reasons, this type of heating performs best in mild climates that experience more sun than average.
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