Deadleg - Revision history

Designing Buildings at 09:41, 18 November 2022

2022-11-18T09:41:27Z

← Older revision		Revision as of 09:41, 18 November 2022
Line 14:		Line 14:
	* Measurement.		* Measurement.
	* Metric system.		* Metric system.
−	* National Calculation Methodology.
	* Plumbing.		* Plumbing.
	* Stagnation point.		* Stagnation point.

Designing Buildings at 09:41, 18 November 2022

2022-11-18T09:41:07Z

← Older revision		Revision as of 09:41, 18 November 2022
Line 4:		Line 4:

	[https://www.bsria.com/uk/product/vBL33D/legionnaires_disease_operation_and_maintenance_log_book_bg_582015_a15d25e1/ Legionnaires' Disease - Operation and Maintenance Log Book (BG 58/2015)], written by Reginald Brown and Salim Deramchi, and published by BSRIA in May 2015, defines dead leg as: ‘A length of pipe that leads to a closed end and does not form part of a circuit. Common examples of dead legs in hot and cold water services systems are pipes leading to a tap.’		[https://www.bsria.com/uk/product/vBL33D/legionnaires_disease_operation_and_maintenance_log_book_bg_582015_a15d25e1/ Legionnaires' Disease - Operation and Maintenance Log Book (BG 58/2015)], written by Reginald Brown and Salim Deramchi, and published by BSRIA in May 2015, defines dead leg as: ‘A length of pipe that leads to a closed end and does not form part of a circuit. Common examples of dead legs in hot and cold water services systems are pipes leading to a tap.’
		+
		+	[https://www.bsria.com/uk/product/BLqmbr/pressurisation_of_closed_heating_and_cooling_systems_bg_822022_a15d25e1 Pressurisation of Closed Heating and Cooling Systems (BG82 2022)], by Rob Clemson, published by BSRIA in October 2022, defines a dead leg as: ‘Any length, or configuration of pipework where the system water (or mains water) does not flow under normal operating conditions.’

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

Designing Buildings at 07:21, 18 July 2022

2022-07-18T07:21:10Z

← Older revision		Revision as of 07:21, 18 July 2022
Line 1:		Line 1:
−	National Calculation Methodology (NCM) modelling guide (for buildings other than dwellings in England) 2013 edition, published by the Department for Communities and Local Government (DCLG), defines the ‘HWS (Hot Water Service) deadleg length’ as the:	+	National Calculation Methodology (NCM) modelling guide (for buildings other than dwellings in England) 2013 edition, published by the Department for Communities and Local Government (DCLG), defines the ‘HWS (Hot Water Service) deadleg length’ as the: ‘Length of the draw-off pipe to the outlet in the space (only used for zones where the water is drawn off). Used to determine the additional volume of water to be heated because the cold water in the deadleg has to be drawn off before hot water is obtained. Assumes that HWS circulation maintains hot water up to the boundary of the zone, or that the pipe runs from circulation or storage vessel within the zone.’

−	~~‘Length~~ of ~~the draw-off~~ pipe to the outlet in ~~the space (only used for zones where the~~ water ~~is drawn off)~~. ~~Used to determine~~ the ~~additional volume of water to be heated because~~ the ~~cold~~ water in ~~the deadleg has to be drawn off~~ before hot water is ~~obtained~~. ~~Assumes that HWS circulation maintains hot water up to the boundary~~ of the ~~zone, or that the pipe runs from circulation or storage vessel within the zone~~.’	+	Climate Emergency Design Guide: How new buildings can meet UK climate change targets, published by the London Energy Transformation Initiative (LETI) in January 2020, defines dead leg as: ‘The length of pipe to the outlet in a hot water system. When the outlet is not in use the hot water in this pipe loses its heat so when next used there is a time delay before fully hot water is again available at the outlet. This represents an inefficiency of the heat system.’

−	~~Climate Emergency Design Guide~~: ~~How new buildings can meet UK climate change targets~~, published by ~~the London Energy Transformation Initiative (LETI)~~ in ~~January 2020~~, defines dead leg as:	+	[https://www.bsria.com/uk/product/vBL33D/legionnaires_disease_operation_and_maintenance_log_book_bg_582015_a15d25e1/ Legionnaires' Disease - Operation and Maintenance Log Book (BG 58/2015)], written by Reginald Brown and Salim Deramchi, and published by BSRIA in May 2015, defines dead leg as: ‘A length of pipe that leads to a closed end and does not form part of a circuit. Common examples of dead legs in hot and cold water services systems are pipes leading to a tap.’
−		+
−	~~‘The~~ length of pipe to ~~the outlet in~~ a ~~hot water system. When the outlet is~~ not in ~~use the~~ hot water ~~in this pipe loses its heat so when next used there is~~ a ~~time delay before fully hot water is again available at the outlet. This represents an inefficiency of the heat system~~.’	+

	= Related articles on Designing Buildings =		= Related articles on Designing Buildings =
Line 19:		Line 17:
	* Zone area.		* Zone area.

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

Editor at 13:58, 12 November 2021

2021-11-12T13:58:40Z

← Older revision		Revision as of 13:58, 12 November 2021
Line 7:		Line 7:
	‘The length of pipe to the outlet in a hot water system. When the outlet is not in use the hot water in this pipe loses its heat so when next used there is a time delay before fully hot water is again available at the outlet. This represents an inefficiency of the heat system.’		‘The length of pipe to the outlet in a hot water system. When the outlet is not in use the hot water in this pipe loses its heat so when next used there is a time delay before fully hot water is again available at the outlet. This represents an inefficiency of the heat system.’

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

	* Building services.		* Building services.
Line 16:		Line 16:
	* National Calculation Methodology.		* National Calculation Methodology.
	* Plumbing.		* Plumbing.
		+	* Stagnation point.
	* Zone area.		* Zone area.

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

Designing Buildings at 08:06, 16 February 2021

2021-02-16T08:06:08Z

← Older revision		Revision as of 08:06, 16 February 2021
Line 18:		Line 18:
	* Zone area.		* Zone area.

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

Designing Buildings at 14:51, 1 April 2020

2020-04-01T14:51:36Z

← Older revision		Revision as of 14:51, 1 April 2020
Line 2:		Line 2:

	‘Length of the draw-off pipe to the outlet in the space (only used for zones where the water is drawn off). Used to determine the additional volume of water to be heated because the cold water in the deadleg has to be drawn off before hot water is obtained. Assumes that HWS circulation maintains hot water up to the boundary of the zone, or that the pipe runs from circulation or storage vessel within the zone.’		‘Length of the draw-off pipe to the outlet in the space (only used for zones where the water is drawn off). Used to determine the additional volume of water to be heated because the cold water in the deadleg has to be drawn off before hot water is obtained. Assumes that HWS circulation maintains hot water up to the boundary of the zone, or that the pipe runs from circulation or storage vessel within the zone.’
		+
		+	Climate Emergency Design Guide: How new buildings can meet UK climate change targets, published by the London Energy Transformation Initiative (LETI) in January 2020, defines dead leg as:
		+
		+	‘The length of pipe to the outlet in a hot water system. When the outlet is not in use the hot water in this pipe loses its heat so when next used there is a time delay before fully hot water is again available at the outlet. This represents an inefficiency of the heat system.’

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =
Line 14:		Line 18:
	* Zone area.		* Zone area.

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

Designing Buildings: Created page with "National Calculation Methodology (NCM) modelling guide (for buildings other than dwellings in England) 2013 edition, published by the Department for Communities and Local Governm..."

2020-04-01T14:49:00Z

Created page with "National Calculation Methodology (NCM) modelling guide (for buildings other than dwellings in England) 2013 edition, published by the Department for Communities and Local Governm..."

New page

National Calculation Methodology (NCM) modelling guide (for buildings other than dwellings in England) 2013 edition, published by the Department for Communities and Local Government (DCLG), defines the ‘HWS (Hot Water Service) deadleg length’ as the:

‘Length of the draw-off pipe to the outlet in the space (only used for zones where the water is drawn off). Used to determine the additional volume of water to be heated because the cold water in the deadleg has to be drawn off before hot water is obtained. Assumes that HWS circulation maintains hot water up to the boundary of the zone, or that the pipe runs from circulation or storage vessel within the zone.’

= Related articles on Designing Buildings Wiki =

* Building services.
* Hot water.
* International Property Measurement Standards.
* Measurement.
* Metric system.
* National Calculation Methodology.
* Plumbing.
* Zone area.

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