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Concept
House Energy Rating
Summary
The House Energy Rating (HER) or House Energy Rating Scheme (HERS) are worldwide standard measures of comparison by which one can evaluate the energy efficiency of a new or an existing building. The comparison is generally done for energy requirements for heating and cooling of indoor space. The energy is the main criterion considered by any international building energy rating scheme but there are some other important factors such as production of greenhouse gases emission, indoor environment quality, cost efficiency and thermal comfort, which are considered by some schemes. Basically, the energy rating of a residential building provides detailed information on the energy consumption and the relative energy efficiency of the building. Hence, HERs inform consumers about the relative energy efficiency of homes and encourage them to use this information in making their house purchase decision.
There are many energy rating tools by which one can calculate the energy performance of a building. Basically all these tools involve a numerical description or prepare a computer-based model for the rating of a building against standard occupancy and activity templates. So, HERS use computer-simulation based methods for assessing the energy efficiency of buildings under standard conditions and its potential for improvement.
HERS is a standardized scheme for evaluation of a home's energy efficiency and expected energy costs. Basically a HERS represents the guideline of a House energy rating. In all countries, HERS show variations in objectives, assessment methodologies & measurement criteria but after all this variation, the goal of all HERS is approximately same and these generate the output in same way.
Basically HERS generates three types of outputs
Rating Scores
The energy performance rating is a type of energy assessment how efficiently the buildings use energy, relative to similar buildings. The performance scores use generally a scale ranging from 0 to 100 or 1 to 5 stars.
Official source
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