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July 9, 2025
The Qv10 value (also known as air permeability ) expresses how many cubic decimeters of air per second leak through the building envelope, per square meter of usable floor space, at a pressure difference of 10 Pascal. In other words: how much air escapes or enters through cracks and seams in the home when there is a small pressure difference (comparable to a light breeze).
A low Qv10 value means that your home is very airtight, which directly contributes to higher energy efficiency. A high Qv10 value indicates many gaps and leaks, resulting in energy loss and comfort issues.
The Qv10 measurement is crucial in today's construction industry for several reasons:
The Qv10 measurement, also known as a blower door test, is performed by a specialized consultant. This is done as follows:
Within the BENG calculation (which forms the basis for the energy label), the Qv10 value is one of three indicators that determine energy performance. A low Qv10 contributes positively to the BENG score, which directly results in a better energy label. For project developers and builders, this means that investing in an airtight building envelope not only contributes to sustainability and comfort, but is also essential to meet legal requirements and deliver a high-quality product.
A correctly performed Qv10 measurement is therefore not a minor detail, but a fundamental step in creating truly energy-efficient and comfortable homes.
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The difference lies mainly in the degree of insulation and the proportion of sustainably generated energy. An A label can be achieved with good insulation and an efficient installation. For A+++, more is needed: a large proportion of the energy must be generated sustainably, for example with solar panels and a heat pump.
The energy label is determined based on the fossil energy consumption of the home, expressed in kWh/m² per year. For an A label, this value is between 105 and 160 kWh/m² per year. With good insulation, an A label is easily achievable. Homes built after 1991 often already have sufficient basic insulation to fall into this category. Solar panels are therefore not necessarily required to achieve an A label.
Practical experience – reliable energy expertise and results-oriented collaboration
The Qv10 value (also known as air permeability ) expresses how many cubic decimeters of air per second leak through the building envelope, per square meter of usable floor space, at a pressure difference of 10 Pascal. In other words: how much air escapes or enters through cracks and seams in the home when there is a small pressure difference (comparable to a light breeze).
A low Qv10 value means that your home is very airtight, which directly contributes to higher energy efficiency. A high Qv10 value indicates many gaps and leaks, resulting in energy loss and comfort issues.
The Qv10 measurement is crucial in today's construction industry for several reasons:
The Qv10 measurement, also known as a blower door test, is performed by a specialized consultant. This is done as follows:
Within the BENG calculation (which forms the basis for the energy label), the Qv10 value is one of three indicators that determine energy performance. A low Qv10 contributes positively to the BENG score, which directly results in a better energy label. For project developers and builders, this means that investing in an airtight building envelope not only contributes to sustainability and comfort, but is also essential to meet legal requirements and deliver a high-quality product.
A correctly performed Qv10 measurement is therefore not a minor detail, but a fundamental step in creating truly energy-efficient and comfortable homes.
Practical experience – reliable energy expertise and results-oriented collaboration
I have experienced Renewable Partners as a reliable and professional party in the field of sustainable energy. They think along well, are transparent in their communication, and deliver customized solutions that really meet the need.
Professional and readily available for questions. I am very satisfied with the service and can recommend the company. Kind regards,
While my energy label doesn't matter at all, new residents are going to renovate the entire house, Nik has still made a thorough and clear report of my old farmhouse. TOP job. Thanks
The energy label inspector is a highly skilled professional who knows his trade. We were helped well and quickly with his advice. The reactions of this company are praising the price, the lowest, and the service, downright TOP!
The recording was done carefully. All documents and construction dimensions were checked/recorded by the advisor Ronan van der Loo. And good advice was given. He finished the recording within 2 hours.
