How to Make a House Energy Efficient

author Dr. Energy Saver   6 год. назад

1,423 Like   81 Dislike

How New Homes Waste Energy | 1-888-225-6260 If you think energy waste is something you only find in older homes, and that new homes are all built with energy efficiency in mind, you are seriously mistaken. A lot of new homes are built with no regard to energy efficiency whatsoever. Sometimes it is because building codes are not updated to meet new energy efficiency standards. Sometimes it is because the builder is unaware of current best green building practices, and sometimes it is simply because they are trying to cut costs in a tough economy and spend more on visible features like energy efficient windows, and green roofing, while forgetting proper insulation and air sealing. Larry Janesky, owner of Dr. Energy Saver, walks us through a new construction project showing the various details that are normally overlooked by builders. Such oversights can result in wasteful and very uncomfortable homes, very expensive heating and cooling costs, and high energy bills. Improper attic insulation, that doesn't meet the U.S. Department of Energy recommended R-Value for the regions is among the most common issues in new construction. Improperly insulated ducts running through unconditioned attics are other sources of energy waste. Some architectural features such as cantilevers, bay windows, and custom windows with round frames, pose additional challenges when it comes to insulation. In particular, they create odd spaces that are hard to fill with popular insulation choices. Fiberglass bats, for example, is the material of choice in most new construction projects, because it is the least expensive, yet it only works when evenly distributed and fluffed inside wall cavities. Compressed fiberglass loses R-Value. These odd spaces around architectural features are often neglected or poorly insulated, creating gaps and cold spots in the building envelope. Common sources of air leakage are often overlooked as well. Holes around pipes, fixtures, ducts and duct chases, allow unconditioned air to move through and leak in and out of the house if not properly sealed. If you have concerns about your new or old house energy consumption, and want to make your home more comfortable and affordable to own, call your energy conservation experts at Dr. Energy Saver!

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Air Sealing Attics

Air sealing is the most important job that a weatherization crew does. Closing up the leaks in a house keeps heated and cooled air from escaping to the outdoors. Along with being more energy efficient, houses without drafts are also more comfortable to live in. This lessons shows weatherization installers why air sealing is one of their most important tasks, and why air sealing in the attic is especially important. | 1-888-225-6260

In this episode of the On the Job series, Larry Janesky, owner and founder of Dr. Energy Saver, walks us through the many ways they made a typical cape house more energy efficient.

This cape had poor attic insulation and serious air leakage, which increased the homeowner's energy bills and caused serious ice damming problems during the winter. As the snow melted on the roof, a ridge of ice forced trapped water to leak into the house. The water damage to the attic and living area raised health and mold concerns. The problem was so significant that during an especially heavy winter storm in the previous year, the homeowner had to climb on the roof and manually break the large ice ridges to keep water from pouring down his kitchen cabinets.

To fix this problem, Dr. Energy Saver completely air sealed the attic to keep heated air in the living space from leaking into the attic. The bathroom fans that were venting into the attic were fitted with ducts to vent to the outside, thus preventing all the air and moisture from leaking into the attic space.

Cape style homes like this one usually have a knee wall space. It is a small space created at the angle between the roof and the floor. A knee wall is usually a big source of energy waste. So the next step was to insulate and air seal the knee wall using a special type of rigid foam board insulation called SilverGlo™, which is lined with a radiant barrier to help conserve heat.

The last step was to insulate the attic, which was originally insulated with a thin layer of fiberglass batt insulation, which measures way below the R-60 value recommended by the U.S. Department of Energy for attics in that region. Besides having insufficient R-Value, fiberglass insulation does not stop air flow.

To insulate this attic, Dr. Energy Saver chose TruSoft™ cellulose insulation. Cellulose insulation is basically recycled newspaper that's treated with borax to prevent pest infestation and mold growth, and fire retardants which give the material an excellent fire safety rating. Cellulose insulation is denser than blown fiberglass and has a higher R-Value of 3.7 per inch. A layer of 17 inches was blown into the attic, with special attention to rafter bays and small cavities created by typical cape style architectural features.

This cape is now ready for winter. The homeowner has a more comfortable house, and his energy bills are much lower. To learn more about ways to save energy in your home, stay tuned for more episodes of Dr. Energy Saver's On The Job series, or call one of our certified energy conservation technicians for a home energy audit!

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