Building Energy Rating (BER)

A Building Energy Rating (BER) serves as a numerical gauge of a building’s energy performance, offering a standardized means to assess and compare energy efficiency. Typically depicted on a scale from A to G, with A representing the most energy-efficient and G the least, the BER takes into consideration various factors influencing a building’s energy consumption. These factors encompass insulation, heating systems, ventilation, and the integration of renewable energy sources. Qualified energy assessors evaluate these elements to calculate the BER, providing valuable insights into a building’s energy efficiency.

 How does a Building Energy Rating (BER) support energy conservation?

  • provides a standardized metric for expressing a building’s energy efficiency, facilitating easy comparison and encouraging energy-conscious decisions in the domestic and commercial property market

  • furnishes potential buyers or tenants with information regarding a property’s energy performance

  • empowers homeowners to make well-informed decisions that can impact energy costs and contribute to environmental sustainability

  • is legally mandated, under Building Regulations Technical Guidance Document Part L when selling or renting a property, offering details about the building’s energy performance and suggestions for enhancing its energy efficiency.

  • is legally mandated under Building Regulations Technical Guidance Document Part L when building a new property

A house-shaped green paperclip with multi-colored energy efficiency rating bars ranging from A to G in red, yellow, green, and black, placed on a wooden surface with blurred background.
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Air Tightness Testing

Air leakage testing, also known as air tightness testing or blower door testing, is a diagnostic procedure used to measure the extent to which air can unintentionally infiltrate or exfiltrate from a building. Air tightness testing or air pressure testing is mandatory for all new dwellings and must not exceed 5/m2/hr/m2 under the current Building Regulation Part(L)

The primary objective is to evaluate the air-tightness of a structure, identifying any gaps, cracks, or openings in its envelope that may contribute to energy inefficiency.

The air leakage test is carried out for the following reasons:

  • Assess the level of air tightness in a building.

  • Identify and quantify air leaks in the building envelope

  • Identify and address areas of air leakage to improve energy efficiency.

  • Enhance indoor air quality by minimizing infiltration of outdoor pollutants.

  • Improve overall thermal comfort and reduce heating and cooling costs.

  • Eliminate drafts and localised cold spots

  • Improving the efficiency of the heat recovery ventilation unit​

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