Air permeability - Revision history

Editor at 06:15, 18 July 2024

2024-07-18T06:15:46Z

← Older revision		Revision as of 06:15, 18 July 2024
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	The assessed air permeability is the value used in establishing the Dwelling Emission Rate (DER) and Dwelling Fabric Energy Efficiency (DFEE) rate and is based on specific measurement of the dwelling concerned or on measurements of other dwellings of the same dwelling type.		The assessed air permeability is the value used in establishing the Dwelling Emission Rate (DER) and Dwelling Fabric Energy Efficiency (DFEE) rate and is based on specific measurement of the dwelling concerned or on measurements of other dwellings of the same dwelling type.

−	The BSRIA guide to 'Commissioning Air Systems' ([https://www.bsria.com/uk/product/rqJzen/commissioning_air_systems_bg_492024_a15d25e1/ BG 49/2024]) by Keith Barker defines 'The amount of air leakage (sometimes referred to as air tightness or Building Leakage Rate) from the building as tested prior to the start of functional testing.' See also [https://www.cibse.org/knowledge-research/knowledge-portal/tm23-testing-buildings-for-air-leakage-2022 CIBSE TM23:2022 'Testing Buildings for Air Leakage'] for further guidance.	+	The BSRIA guide to 'Commissioning Air Systems' ([https://www.bsria.com/uk/product/rqJzen/commissioning_air_systems_bg_492024_a15d25e1/ BG 49/2024]) by Keith Barker defines air permeability as: 'The amount of air leakage (sometimes referred to as air tightness or Building Leakage Rate) from the building as tested prior to the start of functional testing.' See also [https://www.cibse.org/knowledge-research/knowledge-portal/tm23-testing-buildings-for-air-leakage-2022 CIBSE TM23:2022 'Testing Buildings for Air Leakage'] for further guidance.

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =

Editor at 04:59, 18 July 2024

2024-07-18T04:59:48Z

← Older revision		Revision as of 04:59, 18 July 2024
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	The assessed air permeability is the value used in establishing the Dwelling Emission Rate (DER) and Dwelling Fabric Energy Efficiency (DFEE) rate and is based on specific measurement of the dwelling concerned or on measurements of other dwellings of the same dwelling type.		The assessed air permeability is the value used in establishing the Dwelling Emission Rate (DER) and Dwelling Fabric Energy Efficiency (DFEE) rate and is based on specific measurement of the dwelling concerned or on measurements of other dwellings of the same dwelling type.
		+
		+	The BSRIA guide to 'Commissioning Air Systems' ([https://www.bsria.com/uk/product/rqJzen/commissioning_air_systems_bg_492024_a15d25e1/ BG 49/2024]) by Keith Barker defines 'The amount of air leakage (sometimes referred to as air tightness or Building Leakage Rate) from the building as tested prior to the start of functional testing.' See also [https://www.cibse.org/knowledge-research/knowledge-portal/tm23-testing-buildings-for-air-leakage-2022 CIBSE TM23:2022 'Testing Buildings for Air Leakage'] for further guidance.

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =

Designing Buildings at 06:28, 5 February 2024

2024-02-05T06:28:39Z

← Older revision		Revision as of 06:28, 5 February 2024
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	* The assessed air permeability is the value used in establishing the building emission rate and the building primary energy rate. The assessed air permeability is based on a measurement of the air permeability of the building concerned.		* The assessed air permeability is the value used in establishing the building emission rate and the building primary energy rate. The assessed air permeability is based on a measurement of the air permeability of the building concerned.
	\|}		\|}
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−

	The limiting air permeability is the worst allowable air permeability.		The limiting air permeability is the worst allowable air permeability.
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	The assessed air permeability is the value used in establishing the Dwelling Emission Rate (DER) and Dwelling Fabric Energy Efficiency (DFEE) rate and is based on specific measurement of the dwelling concerned or on measurements of other dwellings of the same dwelling type.		The assessed air permeability is the value used in establishing the Dwelling Emission Rate (DER) and Dwelling Fabric Energy Efficiency (DFEE) rate and is based on specific measurement of the dwelling concerned or on measurements of other dwellings of the same dwelling type.

−	= Related articles on Designing Buildings ~~Wiki~~ =	+	= Related articles on Designing Buildings =

	* Air permeability in isolation rooms.		* Air permeability in isolation rooms.

Designing Buildings at 06:28, 5 February 2024

2024-02-05T06:28:20Z

← Older revision		Revision as of 06:28, 5 February 2024
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−	Approved Document ~~L1A~~ Conservation of fuel and power ~~in new dwellings (2010)~~, defines air permeability as:	+	[https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/1141098/The_Merged_Approved_Documents_Mar23.pdf Approved Document L, Conservation of fuel and power, Volume 1: Dwellings, 2021 edition incorporating 2023 amendments], defines air permeability as:
		+
		+	{\|
		+	\|width="100%"\|
		+	The measure of airtightness of the building fabric. It is defined as the air leakage rate per hour per m2 of envelope area at the test reference pressure differential of 50Pa or 4Pa.
		+
		+	* The limiting air permeability is the worst allowable air permeability.
		+	* The design air permeability is the target value set at the design stage.
		+	* The assessed air permeability is the value used in establishing the building emission rate and the building primary energy rate. The assessed air permeability is based on a measurement of the air permeability of the building concerned.
		+	\|}
		+

−	‘…the physical property used to measure airtightness of the building fabric. It is defined as air leakage rate per hour per square metre of envelope area at the test reference pressure differential of 50 pascals (50 N/m2). The envelope area, or measured part of the building, is the total area of all floors, walls and ceilings bordering the internal volume that is the subject of the pressure test. This includes walls and floors below external ground level. Overall internal dimensions are used to calculate this envelope area and no subtractions are made for the area of the junctions of internal walls, floors and ceilings with exterior walls, floors and ceilings.’

	The limiting air permeability is the worst allowable air permeability.		The limiting air permeability is the worst allowable air permeability.

Designing Buildings at 09:12, 6 November 2020

2020-11-06T09:12:41Z

← Older revision		Revision as of 09:12, 6 November 2020
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	* The history of non-domestic air tightness testing.		* The history of non-domestic air tightness testing.

−	[[Category:~~Standards_/_measurements~~]] [[Category:~~DCN_Standard~~]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Regulation]] [[Category:Standards_/_measurements]]

Designing Buildings at 14:26, 26 March 2020

2020-03-26T14:26:44Z

← Older revision		Revision as of 14:26, 26 March 2020
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	The assessed air permeability is the value used in establishing the Dwelling Emission Rate (DER) and Dwelling Fabric Energy Efficiency (DFEE) rate and is based on specific measurement of the dwelling concerned or on measurements of other dwellings of the same dwelling type.		The assessed air permeability is the value used in establishing the Dwelling Emission Rate (DER) and Dwelling Fabric Energy Efficiency (DFEE) rate and is based on specific measurement of the dwelling concerned or on measurements of other dwellings of the same dwelling type.

−	~~= Find out more =~~	+	= Related articles on Designing Buildings Wiki =
−		+
−	=== Related articles on Designing Buildings Wiki ===	+

	* Air permeability in isolation rooms.		* Air permeability in isolation rooms.
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	* Dwelling type.		* Dwelling type.
	* Energy performance certificates.		* Energy performance certificates.
		+	* Permeability.
	* Standard assessment procedure.		* Standard assessment procedure.
	* Target emission rate.		* Target emission rate.
	* The history of non-domestic air tightness testing.		* The history of non-domestic air tightness testing.

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

Editor at 11:35, 21 February 2018

2018-02-21T11:35:40Z

← Older revision		Revision as of 11:35, 21 February 2018
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	=== Related articles on Designing Buildings Wiki ===		=== Related articles on Designing Buildings Wiki ===

−	* Air permeability testing	+	* Air permeability in isolation rooms.
		+	* Air permeability testing.
	* Air tightness in buildings.		* Air tightness in buildings.
	* Approved documents.		* Approved documents.

Designing Buildings at 07:26, 14 August 2017

2017-08-14T07:26:36Z

← Older revision		Revision as of 07:26, 14 August 2017
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	* Building emission rate.		* Building emission rate.
	* Dwelling emission rate.		* Dwelling emission rate.
		+	* Dwelling type.
	* Energy performance certificates.		* Energy performance certificates.
	* Standard assessment procedure.		* Standard assessment procedure.

Designing Buildings at 07:13, 14 August 2017

2017-08-14T07:13:34Z

← Older revision		Revision as of 07:13, 14 August 2017
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−
	Approved Document L1A Conservation of fuel and power in new dwellings (2010), defines air permeability as:		Approved Document L1A Conservation of fuel and power in new dwellings (2010), defines air permeability as:

	‘…the physical property used to measure airtightness of the building fabric. It is defined as air leakage rate per hour per square metre of envelope area at the test reference pressure differential of 50 pascals (50 N/m2). The envelope area, or measured part of the building, is the total area of all floors, walls and ceilings bordering the internal volume that is the subject of the pressure test. This includes walls and floors below external ground level. Overall internal dimensions are used to calculate this envelope area and no subtractions are made for the area of the junctions of internal walls, floors and ceilings with exterior walls, floors and ceilings.’		‘…the physical property used to measure airtightness of the building fabric. It is defined as air leakage rate per hour per square metre of envelope area at the test reference pressure differential of 50 pascals (50 N/m2). The envelope area, or measured part of the building, is the total area of all floors, walls and ceilings bordering the internal volume that is the subject of the pressure test. This includes walls and floors below external ground level. Overall internal dimensions are used to calculate this envelope area and no subtractions are made for the area of the junctions of internal walls, floors and ceilings with exterior walls, floors and ceilings.’
		+
		+	The limiting air permeability is the worst allowable air permeability.
		+
		+	The design air permeability is the target value set at the design stage, and must always be no worse than the limiting value.
		+
		+	The assessed air permeability is the value used in establishing the Dwelling Emission Rate (DER) and Dwelling Fabric Energy Efficiency (DFEE) rate and is based on specific measurement of the dwelling concerned or on measurements of other dwellings of the same dwelling type.

	= Find out more =		= Find out more =

	=== Related articles on Designing Buildings Wiki ===		=== Related articles on Designing Buildings Wiki ===
−	*Air permeability testing	+
−	*Air tightness in buildings.	+	* Air permeability testing
−	*Approved documents.	+	* Air tightness in buildings.
−	*Building emission rate.	+	* Approved documents.
−	*Dwelling emission rate.	+	* Building emission rate.
−	*Energy performance certificates.	+	* Dwelling emission rate.
−	*Standard assessment procedure.	+	* Energy performance certificates.
−	*Target emission rate.	+	* Standard assessment procedure.
−	*The history of non-domestic air tightness testing.	+	* Target emission rate.
		+	* The history of non-domestic air tightness testing.

	[[Category:Standards_/_measurements]]		[[Category:Standards_/_measurements]]

Designing Buildings: Created page with " Approved Document L1A Conservation of fuel and power in new dwellings (2010), defines air permeability as: ‘…the physical property used to measure airtightness of the build..."

2015-06-29T09:19:52Z

Created page with " Approved Document L1A Conservation of fuel and power in new dwellings (2010), defines air permeability as: ‘…the physical property used to measure airtightness of the build..."

New page

Approved Document L1A Conservation of fuel and power in new dwellings (2010), defines air permeability as:

‘…the physical property used to measure airtightness of the building fabric. It is defined as air leakage rate per hour per square metre of envelope area at the test reference pressure differential of 50 pascals (50 N/m2). The envelope area, or measured part of the building, is the total area of all floors, walls and ceilings bordering the internal volume that is the subject of the pressure test. This includes walls and floors below external ground level. Overall internal dimensions are used to calculate this envelope area and no subtractions are made for the area of the junctions of internal walls, floors and ceilings with exterior walls, floors and ceilings.’

= Find out more =

=== Related articles on Designing Buildings Wiki ===
*Air permeability testing
*Air tightness in buildings.
*Approved documents.
*Building emission rate.
*Dwelling emission rate.
*Energy performance certificates.
*Standard assessment procedure.
*Target emission rate.
*The history of non-domestic air tightness testing.

[[Category:Standards_/_measurements]]