Contents • • • • • • • • • • • • • • • • • • • • • Principle [ ] When the object of study is an occupied building then reducing energy consumption while maintaining or improving human comfort, health and safety are of primary concern. Beyond simply identifying the sources of energy use, an energy audit seeks to prioritize the energy uses according to the greatest to least cost effective opportunities for energy savings. Home energy audit [ ] A home energy audit is a service where the energy efficiency of a house is evaluated by a person using professional equipment (such as and ), with the aim to suggest the best ways to improve energy efficiency in heating and cooling the house. An energy audit of a home may involve recording various characteristics of the including the walls, ceilings, floors, doors, windows, and skylights. For each of these components the area and resistance to heat flow () is measured or estimated. The leakage rate or infiltration of air through the building envelope is of concern, both of 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. The audit may also assess the, physical condition, and programming of such as the heating, ventilation, air conditioning equipment, and thermostat. A home energy audit may include a written report estimating energy use given local criteria, thermostat settings, roof overhang, and. 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. Deadly Innocence Scott Burnside Pdf Merge.

The energy billing history from the local utility company can be calibrated using and 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 energy efficiency grants from central government. Recently, the improvement of technology has enabled homeowners to perform relatively sophisticated energy audits of their own homes. This technique has been identified as a method to accelerate improvements. In the United States [ ] In the United States, this kind of service can often be facilitated by: • Public utility companies, or their energy conservation department.