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Energy Audits can save energy and dollars. Residential and Commercial

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Energy Audit Residential & Commercial

An energy audit of a home may involve recording various characteristics of the building envelope including the walls, ceilings, floors, doors, windows, and skylights. For each of these components the area and resistance to heat flow (R-value) is measured or estimated. The leakage rate or infiltration of air through the building envelope is of concern which are strongly affected by window construction and quality of door seals such as weatherstripping. The goal of this exercise is to quantify the building's overall thermal performance. A simplified approach called the UA delta-T method [1] can be used for good approximate results. The audit may also assess the efficiency, physical condition, and programming of mechanical systems such as the heating, ventilation, air conditioning equipment, and thermostat.

A home energy audit may include a written report estimating energy use given local climate criteria, thermostat settings, roof overhang, and solar orientation. This could show energy use for a given time period, say a year, and the impact of any suggested improvements per year. The accuracy of energy estimates are greatly improved when the homeowner's billing history is available showing the quantities of electricity, natural gas, fuel oil, or other energy sources consumed over a one or two-year period.

Some of the greatest effects on energy use are user behavior, climate, and age of the home. An energy audit may therefore include an interview of the homeowners to understand their patterns of use over time. The energy billing history from the local utility company can be calibrated using heating degree day and cooling degree day data obtained from recent, local weather data in combination with the thermal energy model of the building. Advances in computer-based thermal modeling can take into account many variables affecting energy use.

A home energy audit is often used to identify cost effective ways to improve the comfort and efficiency of buildings. In addition, homes may qualify for tax credits from local and central governments.




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    • Currently 3.5/5 Stars.
    Green Design Rx
    3993 Eagle Flight Dr
    Simi Valley, California 93065
    California
    Green Design Rx offers a full assortment of green consulting services including, all HERS rating services, LEED facilitation and consultation, GreenPoint Rated (new and existing homes).
    CHEERS new and existing home rating services, including all updated credentials for the 2008 Title 24 release (August 1, 2009)
  • The Building Doctors
    5042 Wilshire Bvd.
    Suite 268
    Los Angeles, California 90036
    California
    We are a licensed California general contractor (CLSB# 932241) specializing in home energy audits and energy efficiency retrofitting. We are also a certified HERS 2 Rater specializing in EEM's.
    • Currently 3.5/5 Stars.
    Green Energy Engineering Services
    1580 Derry Drive
    Dresher, Philadelphia 19025
    Philadelphia
    Home and commercial energy audits in the mid-Atlantic region by Professional Engineers licensed in Pennsylvania and New Jersey. Blower door and duct testing with infrared scans to assess air tightness and provide a strategy for sealing. Heat and ventilation system evaluations for energy efficiency. HERS rater for energy efficient mortgages.
    • Currently 3.5/5 Stars.
    A Green Plan, Inc. Hot
    P.O. Box 6061
    #375
    Sherman Oaks, California 91413
    California
    Our company continues to provide environmentally friendly products and services for residential and commerical facilities to promote sustainability. Energy consulting, LEED projects, and various aspects of LEED/green services are our specilaties. Please contact us for any of your GREEN needs.
    • Currently 3.5/5 Stars.
    Construction Performance Services

    Laguna Hills, California 92653
    California
    We are a company that does home testing that serves all of Southern California. We can offer HERS Verification, Duct Testing, Blower Door Testing, Infrared Testing, Energy Testing, etc.
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