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The program trains HVAC contractors to offer no-cost diagnostic tune-ups to utility customers’ HVAC systems. [13] Increasing the efficiency of HVAC equipment saves energy from what is typically a home or commercial building's largest energy consumer. [14] It also increases equipment life and reduces the building's environmental impact.
Energy use/Cost prediction HERS generate energy use and cost predictions for specific end uses like space heating/cooling, hot water and for whole house. These outputs are obtained in absolute measures and unlike to score rating these outputs can be used to compare houses like that of miles-per-gallon ratings are used to compare the cars.
Heating degree day (HDD) is a measurement designed to quantify the demand for energy needed to heat a building. HDD is derived from measurements of outside air temperature. The estimated average heating energy requirements for a given building at a specific location are considered to be directly proportional to the number of HDD at that location.
[2] [3] Air conditioning is a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC). [4] Heat pumps are similar in many ways to air conditioners, but use a reversing valve to allow them both to heat and to cool an enclosed space. [5]
In the United States, the efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER) which is defined by the Air Conditioning, Heating, and Refrigeration Institute, a trade association, in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [1]
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