Heat loss - Revision history

Editor at 11:35, 11 February 2022

2022-02-11T11:35:34Z

← Older revision		Revision as of 11:35, 11 February 2022
Line 35:		Line 35:
	* Emissivity.		* Emissivity.
	* Heat gain.		* Heat gain.
		+	* Heat pumps and heat waves: How overheating complicates ending gas in the UK.
	* Heat transfer.		* Heat transfer.
	* Mean radiant temperature.		* Mean radiant temperature.

Editor at 12:32, 7 February 2022

2022-02-07T12:32:44Z

← Older revision		Revision as of 12:32, 7 February 2022
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	* Solid wall insulation.		* Solid wall insulation.

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

	* Building performance.		* Building performance.
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	* Mean radiant temperature.		* Mean radiant temperature.
	* Passive building design.		* Passive building design.
		+	* The cavity wall real performance question.
	* Thermal insulation for buildings.		* Thermal insulation for buildings.
	* Thermal mass.		* Thermal mass.

Designing Buildings at 12:59, 20 October 2020

2020-10-20T12:59:07Z

← Older revision		Revision as of 12:59, 20 October 2020
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	* Vapour barrier.		* Vapour barrier.

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

Designing Buildings at 13:58, 8 March 2019

2019-03-08T13:58:54Z

← Older revision		Revision as of 13:58, 8 March 2019
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−	~~[[File:Facade_heating_290~~.~~jpg\|link=File:Facade_heating_290.jpg]]~~	+	Heat is the energy that is transferred between different systems as a result of thermodynamic interactions.

−	Heat loss is a measure of negative heat transfer through a building’s fabric from the inside to the outside. This can be due to either convection, conduction, radiation, or a combination. The colder the outside temperature, the warmer the inside, and the worse the thermal insulation of the building fabric, the greater the heat loss will be.	+	Heat loss is a measure of negative heat transfer through a building’s fabric from the inside to the outside. This can be due to either convection, conduction, radiation, mass transfer, or a combination. The colder the outside temperature, the warmer the inside, and the worse the thermal insulation of the building fabric, the greater the heat loss will be.

	Heat loss is typically measured in either kilowatts (kW) or British Thermal Units (BTUs).		Heat loss is typically measured in either kilowatts (kW) or British Thermal Units (BTUs).

−	U-values (sometimes referred to as heat transfer coefficients or thermal transmittances) are used to measure how effective elements of a building's fabric ~~can insulate~~ against heat loss (or heat gain). The lower the U-value of an element of a building's fabric, the more slowly heat is able to transmit through it, and so the better it performs as an insulator. Very broadly, the better (i.e. lower) the U-value of a building's fabric, the less energy is required to maintain comfortable conditions inside the building.	+	U-values (sometimes referred to as heat transfer coefficients or thermal transmittances) are used to measure how effective elements of a building's fabric are at insulating against heat loss (or heat gain). The lower the U-value of an element of a building's fabric, the more slowly heat is able to transmit through it, and so the better it performs as an insulator. Very broadly, the better (i.e. lower) the U-value of a building's fabric, the less energy is required to maintain comfortable conditions inside the building.

−	Typically, the older a building is, the more it will be susceptible to heat loss. Levels of heat loss will vary depending on the type of building; for example, a terraced house will lose a higher proportion of heat through the floor and ~~wall~~ rather than walls, nearly all the heat loss from a flat will be through the outside walls.	+	The building regulations require that reasonable provision be made to limit heat gains and losses through the fabric of new buildings and works to existing buildings. The approved documents to the buildings regulations set out the limiting standards for the properties of the fabric elements of the building, described in terms of maximum U-values. For more information see: Limiting fabric standards.
		+
		+	Typically, the older a building is, the more it will be susceptible to heat loss. This can be due to a combination of poor (or no) insulation, thermal bridging across the building envelope, single glazing, poor airtightness and so on,
		+
		+	Levels of heat loss will vary depending on the type of building; for example, a terraced house will lose a higher proportion of heat through the floor and roof rather than walls, whilst nearly all the heat loss from a flat will be through the outside walls.

	The following estimates indicate the proportionate heat loss from a badly insulated house:		The following estimates indicate the proportionate heat loss from a badly insulated house:
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	(Ref. [https://ired.co.uk/ www.ired.co.uk)]		(Ref. [https://ired.co.uk/ www.ired.co.uk)]

−	Some of the techniques that can be used to combat ~~and tackle~~ heat loss include:	+	Some of the techniques that can be used to combat heat loss in existing buildings include:

	* Draught-proofing.		* Draught-proofing.
Line 25:		Line 29:
	* Floor insulation.		* Floor insulation.
	* Solid wall insulation.		* Solid wall insulation.
−
−	The building regulations require that reasonable provision be made to limit heat gains and losses through the fabric of new buildings and works to existing buildings. The approved documents to the buildings regulations set out the limiting standards for the properties of the fabric elements of the building.
−
−	~~For more information see: Limiting fabric standards~~

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =
Line 44:		Line 44:
	* Vapour barrier.		* Vapour barrier.

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

Editor at 17:32, 19 February 2019

2019-02-19T17:32:24Z

← Older revision		Revision as of 17:32, 19 February 2019
Line 34:		Line 34:
	* Building performance.		* Building performance.
	* Emissivity.		* Emissivity.
		+	* Heat gain.
	* Heat transfer.		* Heat transfer.
	* Mean radiant temperature.		* Mean radiant temperature.

Designing Buildings at 15:42, 24 January 2019

2019-01-24T15:42:17Z

← Older revision		Revision as of 15:42, 24 January 2019
Line 25:		Line 25:
	* Floor insulation.		* Floor insulation.
	* Solid wall insulation.		* Solid wall insulation.
		+
		+	The building regulations require that reasonable provision be made to limit heat gains and losses through the fabric of new buildings and works to existing buildings. The approved documents to the buildings regulations set out the limiting standards for the properties of the fabric elements of the building.
		+
		+	For more information see: Limiting fabric standards

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

Designing Buildings at 15:39, 24 January 2019

2019-01-24T15:39:25Z

← Older revision		Revision as of 15:39, 24 January 2019
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	[[File:Facade_heating_290.jpg\|link=File:Facade_heating_290.jpg]]		[[File:Facade_heating_290.jpg\|link=File:Facade_heating_290.jpg]]

−	Heat loss is a measure of ~~the~~ heat transfer through a building’s fabric from the inside to the outside~~, generally from the hotter system to the cooler system~~. This can be due to either convection, conduction, radiation, or a combination. The colder the outside temperature, the greater the heat loss will be ~~through the building fabric~~.	+	Heat loss is a measure of negative heat transfer through a building’s fabric from the inside to the outside. This can be due to either convection, conduction, radiation, or a combination. The colder the outside temperature, the warmer the inside, and the worse the thermal insulation of the building fabric, the greater the heat loss will be.

−	Heat loss is typically measured in either kilowatts (kW) or British Thermal Units (BTUs)~~, and represents the required energy to maintain a room at a given temperature~~.	+	Heat loss is typically measured in either kilowatts (kW) or British Thermal Units (BTUs).

−	U-values (sometimes referred to as heat transfer coefficients or thermal transmittances) are used to measure how effective elements of a building's fabric ~~are as insulators. That is, how effective they are at preventing~~ heat loss. The lower the U-value of an element of a building's fabric, the more slowly heat is able to transmit through it, and so the better it performs as an insulator. Very broadly, the better (i.e. lower) the U-value of a building's fabric, the less energy is required to maintain comfortable conditions inside the building.	+	U-values (sometimes referred to as heat transfer coefficients or thermal transmittances) are used to measure how effective elements of a building's fabric can insulate against heat loss (or heat gain). The lower the U-value of an element of a building's fabric, the more slowly heat is able to transmit through it, and so the better it performs as an insulator. Very broadly, the better (i.e. lower) the U-value of a building's fabric, the less energy is required to maintain comfortable conditions inside the building.

−	Typically, the older a building is, the more it will be susceptible to heat loss ~~unless it undergoes sufficient renovation works to improve airtightness and energy efficiency~~. Levels of heat loss will vary depending on the type of building; for example, a terraced house will lose a higher proportion of heat through the floor and wall rather than walls, nearly all the heat loss from a flat will be through the outside walls. The following ~~estimate measures~~ indicate the proportionate heat loss from a badly insulated house:	+	Typically, the older a building is, the more it will be susceptible to heat loss. Levels of heat loss will vary depending on the type of building; for example, a terraced house will lose a higher proportion of heat through the floor and wall rather than walls, nearly all the heat loss from a flat will be through the outside walls.
		+
		+	The following estimates indicate the proportionate heat loss from a badly insulated house:

	* Up to 25% through the roof.		* Up to 25% through the roof.

Editor at 16:31, 22 January 2019

2019-01-22T16:31:24Z

← Older revision		Revision as of 16:31, 22 January 2019
Line 1:		Line 1:
−	[[File:~~Facade heating 290~~.jpg]]	+	[[File:Facade_heating_290.jpg\|link=File:Facade_heating_290.jpg]]

	Heat loss is a measure of the heat transfer through a building’s fabric from the inside to the outside, generally from the hotter system to the cooler system. This can be due to either convection, conduction, radiation, or a combination. The colder the outside temperature, the greater the heat loss will be through the building fabric.		Heat loss is a measure of the heat transfer through a building’s fabric from the inside to the outside, generally from the hotter system to the cooler system. This can be due to either convection, conduction, radiation, or a combination. The colder the outside temperature, the greater the heat loss will be through the building fabric.
Line 26:		Line 26:
	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =

		+	* Building performance.
	* Emissivity.		* Emissivity.
	* Heat transfer.		* Heat transfer.

Editor: Created page with "File:Facade heating 290.jpg Heat loss is a measure of the heat transfer through a building’s fabric from the inside to the outside, generally from the hotter system to the..."

2018-11-21T15:08:56Z

Created page with "File:Facade heating 290.jpg Heat loss is a measure of the heat transfer through a building’s fabric from the inside to the outside, generally from the hotter system to the..."

New page

[[File:Facade heating 290.jpg]]

Heat loss is a measure of the heat transfer through a building’s fabric from the inside to the outside, generally from the hotter system to the cooler system. This can be due to either convection, conduction, radiation, or a combination. The colder the outside temperature, the greater the heat loss will be through the building fabric.

Heat loss is typically measured in either kilowatts (kW) or British Thermal Units (BTUs), and represents the required energy to maintain a room at a given temperature.

U-values (sometimes referred to as heat transfer coefficients or thermal transmittances) are used to measure how effective elements of a building's fabric are as insulators. That is, how effective they are at preventing heat loss. The lower the U-value of an element of a building's fabric, the more slowly heat is able to transmit through it, and so the better it performs as an insulator. Very broadly, the better (i.e. lower) the U-value of a building's fabric, the less energy is required to maintain comfortable conditions inside the building.

Typically, the older a building is, the more it will be susceptible to heat loss unless it undergoes sufficient renovation works to improve airtightness and energy efficiency. Levels of heat loss will vary depending on the type of building; for example, a terraced house will lose a higher proportion of heat through the floor and wall rather than walls, nearly all the heat loss from a flat will be through the outside walls. The following estimate measures indicate the proportionate heat loss from a badly insulated house:

* Up to 25% through the roof.
* Up to 35% through outside walls.
* Up to 25% through doors and windows.
* Up to 15% through ground floors.

(Ref. [https://ired.co.uk/ www.ired.co.uk)]

Some of the techniques that can be used to combat and tackle heat loss include:

* Draught-proofing.
* Roof insulation.
* Double-glazing.
* Floor insulation.
* Solid wall insulation.

= Related articles on Designing Buildings Wiki =

* Emissivity.
* Heat transfer.
* Mean radiant temperature.
* Passive building design.
* Thermal insulation for buildings.
* Thermal mass.
* Thermal resistance.
* U value.
* Vapour barrier.

[[Category:Standards_/_measurements]] [[Category:Construction_techniques]] [[Category:Design]]