Air pressure q50 test - Revision history

84.69.62.9 at 09:04, 10 June 2022

2022-06-10T09:04:05Z

← Older revision		Revision as of 09:04, 10 June 2022
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−	The q50-value over one hour is used ~~by the Air Tightness Testing & Measurement Association (ATTMA)~~ to describe the air leakage (or air infiltration rate) of a building envelope at a pressure difference of 50 Pascals (Pa). This standard is related to the rate that air infiltrates the whole envelope of a building when doors and windows are closed thus the volume is calculated to include everything within the envelope or the air tightness line.	+	The q50-value over one hour is used to describe the air leakage (or air infiltration rate) of a building envelope at a pressure difference of 50 Pascals (Pa). This standard is related to the rate that air infiltrates the whole envelope of a building when doors and windows are closed thus the volume is calculated to include everything within the envelope or the air tightness line.

	This is measured through a q50 pressure test which is carried out by closing and sealing doors and windows and installing a door blower to create a pressure differential of 50 Pa (equivalent to a 5 mm water column) between the inside and outside, to measure the air leakage. The standard (or q50) and the UK building regulations requires a test result which is less than 5m3 of air per hour per m2 of floor area @ 50 Pascals expressed as < 5m3/hm2@50pa. Note that the volume of the building is based on the total volume within the building envelope as opposed to the sum of the volume of all internal rooms as is used for the Passivhaus standard.		This is measured through a q50 pressure test which is carried out by closing and sealing doors and windows and installing a door blower to create a pressure differential of 50 Pa (equivalent to a 5 mm water column) between the inside and outside, to measure the air leakage. The standard (or q50) and the UK building regulations requires a test result which is less than 5m3 of air per hour per m2 of floor area @ 50 Pascals expressed as < 5m3/hm2@50pa. Note that the volume of the building is based on the total volume within the building envelope as opposed to the sum of the volume of all internal rooms as is used for the Passivhaus standard.

Designing Buildings at 10:35, 22 April 2022

2022-04-22T10:35:51Z

← Older revision		Revision as of 10:35, 22 April 2022
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−	The q50-~~[https://www.designingbuildings.co.uk/wiki/Value~~ value] over one hour is used by the Air Tightness Testing & Measurement Association (ATTMA) to describe the air leakage (or air infiltration rate) of a building envelope at a ~~[https://www.designingbuildings.co.uk/wiki/Pressure~~ pressure] difference of 50 Pascals (Pa). This ~~[https://www.designingbuildings.co.uk/wiki/Standards~~ standard] is ~~interested in~~ the rate that air infiltrates the whole envelope of a building when doors and windows are closed thus the volume is calculated to include everything within the envelope or the air tightness line.	+	The q50-value over one hour is used by the Air Tightness Testing & Measurement Association (ATTMA) to describe the air leakage (or air infiltration rate) of a building envelope at a pressure difference of 50 Pascals (Pa). This standard is related to the rate that air infiltrates the whole envelope of a building when doors and windows are closed thus the volume is calculated to include everything within the envelope or the air tightness line.

−	This is ~~[https://www.designingbuildings.co.uk/wiki/Measured~~ measured] through a ~~q[https://www.designingbuildings.co.uk/wiki/N50 50] [https://www.designingbuildings.co.uk/wiki/Pressure~~ pressure] test which is carried out by closing and ~~[https://www.designingbuildings.co.uk/wiki/Sealing~~ sealing~~] [https://www.designingbuildings.co.uk/wiki/Doors~~ doors] and ~~[https://www.designingbuildings.co.uk/wiki/Window~~ windows] and installing a ~~[https://www.designingbuildings.co.uk/wiki/Doors~~ door] blower to create a ~~[https://www.designingbuildings.co.uk/wiki/Pressure~~ pressure] differential of 50 Pa (equivalent to a 5 mm ~~[https://www.designingbuildings.co.uk/wiki/Water~~ water~~] [https://www.designingbuildings.co.uk/wiki/Column~~ column]) between the inside and outside, to ~~[https://www.designingbuildings.co.uk/wiki/Measure~~ measure] the air leakage. The ~~[https://www.designingbuildings.co.uk/wiki/Standards~~ standard] (or ~~q[https://www.designingbuildings.co.uk/wiki/N50 50]~~) and the UK building regulations requires a test result which is less than 5m3 of air per hour per m2 of floor area @ 50 Pascals expressed as < 5m3/hm2@50pa. Note that the ~~[https://www.designingbuildings.co.uk/wiki/Volume~~ volume] of the ~~[https://www.designingbuildings.co.uk/wiki/Building~~ building] is based on the total ~~[https://www.designingbuildings.co.uk/wiki/Volume~~ volume] within the building ~~[https://www.designingbuildings.co.uk/wiki/Envelope~~ envelope] as opposed to the sum of the volume of all internal rooms as is used for the Passivhaus standard.	+	This is measured through a q50 pressure test which is carried out by closing and sealing doors and windows and installing a door blower to create a pressure differential of 50 Pa (equivalent to a 5 mm water column) between the inside and outside, to measure the air leakage. The standard (or q50) and the UK building regulations requires a test result which is less than 5m3 of air per hour per m2 of floor area @ 50 Pascals expressed as < 5m3/hm2@50pa. Note that the volume of the building is based on the total volume within the building envelope as opposed to the sum of the volume of all internal rooms as is used for the Passivhaus standard.

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =
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	* The history of non-domestic air tightness testing.		* The history of non-domestic air tightness testing.

−	[[Category:DCN_Definition]] [[Category:Definitions]]	+	[[Category:DCN_Definition]] [[Category:DCN_Standard]] [[Category:Definitions]] [[Category:Standards_/_measurements]]

Editor: moved Air pressure q50 to Air pressure q50 test: better description

2022-04-19T06:23:30Z

moved Air pressure q50 to Air pressure q50 test: better description

← Older revision

Revision as of 06:23, 19 April 2022

Editor: Created page with "The q50-[https://www.designingbuildings.co.uk/wiki/Value value] over one hour is used by the Air Tightness Testing & Measurement Association (ATTMA) to describe the air leaka..."

2022-04-19T06:23:00Z

Created page with "The q50-[https://www.designingbuildings.co.uk/wiki/Value value] over one hour is used by the Air Tightness Testing & Measurement Association (ATTMA) to describe the air leaka..."

New page

The q50-[https://www.designingbuildings.co.uk/wiki/Value value] over one hour is used by the Air Tightness Testing & Measurement Association (ATTMA) to describe the air leakage (or air infiltration rate) of a building envelope at a [https://www.designingbuildings.co.uk/wiki/Pressure pressure] difference of 50 Pascals (Pa). This [https://www.designingbuildings.co.uk/wiki/Standards standard] is interested in the rate that air infiltrates the whole envelope of a building when doors and windows are closed thus the volume is calculated to include everything within the envelope or the air tightness line.

This is [https://www.designingbuildings.co.uk/wiki/Measured measured] through a q[https://www.designingbuildings.co.uk/wiki/N50 50] [https://www.designingbuildings.co.uk/wiki/Pressure pressure] test which is carried out by closing and [https://www.designingbuildings.co.uk/wiki/Sealing sealing] [https://www.designingbuildings.co.uk/wiki/Doors doors] and [https://www.designingbuildings.co.uk/wiki/Window windows] and installing a [https://www.designingbuildings.co.uk/wiki/Doors door] blower to create a [https://www.designingbuildings.co.uk/wiki/Pressure pressure] differential of 50 Pa (equivalent to a 5 mm [https://www.designingbuildings.co.uk/wiki/Water water] [https://www.designingbuildings.co.uk/wiki/Column column]) between the inside and outside, to [https://www.designingbuildings.co.uk/wiki/Measure measure] the air leakage. The [https://www.designingbuildings.co.uk/wiki/Standards standard] (or q[https://www.designingbuildings.co.uk/wiki/N50 50]) and the UK building regulations requires a test result which is less than 5m3 of air per hour per m2 of floor area @ 50 Pascals expressed as < 5m3/hm2@50pa. Note that the [https://www.designingbuildings.co.uk/wiki/Volume volume] of the [https://www.designingbuildings.co.uk/wiki/Building building] is based on the total [https://www.designingbuildings.co.uk/wiki/Volume volume] within the building [https://www.designingbuildings.co.uk/wiki/Envelope envelope] as opposed to the sum of the volume of all internal rooms as is used for the Passivhaus standard.

= Related articles on Designing Buildings =

* Accredited construction details ACDs.
* Air change rates.
* Air permeability testing.
* Air pressure n50 test.
* Air tightness in buildings
* Airtightness of energy efficient buildings.
* Draughts in buildings.
* Energy audit.
* Floor plenum airtightness.
* Indoor air quality.
* Indoor air velocity.
* Passivhaus.
* Site inspections.
* Thermographic survey.
* The history of non-domestic air tightness testing.

[[Category:DCN_Definition]] [[Category:Definitions]]