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Browsing Energy auditing » Energy Audit Residential » Philadelphia

Energy Audit Residential

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 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.
  • PHP Energy Solutions

    Philadelphia 19050
    Philadelphia
    We perform Energy Efficiency auditing for residential owners. Our recommendations will save 25-40% on all utility costs. Most of our solutions are inexpensive and easy to implement. Call us today!
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