Window-Air-Leakage - Revision history

Simcha: /* Energy Star Windows */

2013-03-18T21:34:03Z

Energy Star Windows

← Older revision		Revision as of 21:34, 18 March 2013
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	The criteria for tax credit-eligible windows varies according to the homeowner's climate. The Energy Star program identifies Energy Star windows according to the NFRC's U-Factor and Solar Heat Gain Coefficient ratings. Energy Star does not include the ratings for Air Leakage, Visible Transmittance or Condensation Resistance.		The criteria for tax credit-eligible windows varies according to the homeowner's climate. The Energy Star program identifies Energy Star windows according to the NFRC's U-Factor and Solar Heat Gain Coefficient ratings. Energy Star does not include the ratings for Air Leakage, Visible Transmittance or Condensation Resistance.
		+
		+	{{Energy Efficient Windows‎}}


	[[Category:Replacement Windows]]		[[Category:Replacement Windows]]

Simcha at 20:25, 7 February 2013

2013-02-07T20:25:53Z

← Older revision		Revision as of 20:25, 7 February 2013
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	Negative air leakage occurs when dry outdoor air leaks into the house and prevents moist indoor air from leaking out. Negative air leakage prevents moisture and condensation problems.		Negative air leakage occurs when dry outdoor air leaks into the house and prevents moist indoor air from leaking out. Negative air leakage prevents moisture and condensation problems.

−	== ~~Air Leakage and~~ Heat Loss and Heat Gain ==	+	== Heat Loss and Heat Gain ==
	Heat loss and heat gain occur when air infiltrates through cracks in the window assembly. The rate at which air filters into a house through the window unit is expressed as the Air Leakage (AL) rating. It measures in cubic feet of air as the air passes through a square foot of window area. The lower the Air Leakage rating, the less air will pass through cracks in the window assembly.		Heat loss and heat gain occur when air infiltrates through cracks in the window assembly. The rate at which air filters into a house through the window unit is expressed as the Air Leakage (AL) rating. It measures in cubic feet of air as the air passes through a square foot of window area. The lower the Air Leakage rating, the less air will pass through cracks in the window assembly.

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	== Variants ==		== Variants ==
−	Air leakage rates for a replacement window vary, depending on environmental factors (humidity, temperature, pressure, barometric, quality control, operating style differences, usage-stresses, long term durability, methods of installation, and design/material selection. ~~The air~~ leakage measurements are primarily intended for purposes of product comparison.	+	Air leakage rates for a replacement window vary, depending on environmental factors, humidity, temperature, pressure, barometric, quality control, operating style differences, usage-stresses, long term durability, methods of installation, and design/material selection. Air leakage measurements are primarily intended for purposes of product comparison.

	== National Fenestration Ratings Council ==		== National Fenestration Ratings Council ==
−	The [[National Fenestration Ratings Council\| National Fenestration Ratings Council (NFRC)]] provides Air Leakage ratings for replacement windows as well as for new construction windows. The NFRC is a non-profit agency which rates windows according to a window's ability to offer protection from weather elements as well as to provide thermal insulation and reduce solar heat gain. The NFRC rates windows and lists their ratings on the windows' labels. It performs this service for participant window manufacturers so that these manufacturers can alert consumers regarding the energy performance of window products. ~~The~~ labels also assist homeowners who want to compare the performance of various brands of replacement windows. The [[Energy Star Windows\|Energy Star program]] uses NFRC ratings to identify windows which may be eligible for rebates and tax credit on national, state and local levels.	+	The [[National Fenestration Ratings Council\|National Fenestration Ratings Council (NFRC)]] provides Air Leakage ratings for replacement windows as well as for new construction windows. The NFRC is a non-profit agency which rates windows according to a window's ability to offer protection from weather elements as well as to provide thermal insulation and reduce solar heat gain. The NFRC rates windows and lists their ratings on the windows' labels. It performs this service for participant window manufacturers so that these manufacturers can alert consumers regarding the energy performance of their window products. These labels also assist homeowners who want to compare the performance of various brands of replacement windows. The [[Energy Star Windows\|Energy Star program]] uses NFRC ratings to identify windows which may be eligible for rebates and tax credit on national, state and local levels.

	The NFRC rates a window's U-Factor, Solar Heat Gain Coefficient, Visible Transmittance, Air Leakage and Condensation Resistance.		The NFRC rates a window's U-Factor, Solar Heat Gain Coefficient, Visible Transmittance, Air Leakage and Condensation Resistance.
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	=== Solar Heat Gain Coefficient ===		=== Solar Heat Gain Coefficient ===
−	A window's [[~~solar heat gain coefficient~~\| solar heat gain coefficient]] measures the rate at which a window is able to block the sun's heat. Lower SHGCs are better at blocking unwanted heat gain than high SHGCs.	+	A window's [[Solar Heat Gain Coefficient\|solar heat gain coefficient]] measures the rate at which a window is able to block the sun's heat. Lower SHGCs are better at blocking unwanted heat gain than high SHGCs.

	=== Visible Transmittance ===		=== Visible Transmittance ===

Simcha at 20:19, 7 February 2013

2013-02-07T20:19:11Z

← Older revision		Revision as of 20:19, 7 February 2013
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	\|data8 = A ratings provided by the NFRC to determine the percentage of air that will leak into a house through a replacement window.}}		\|data8 = A ratings provided by the NFRC to determine the percentage of air that will leak into a house through a replacement window.}}

−	'''Air leakage ratings''' provide an assessment of the rate at which air leaks into or out of a home due to gaps surrounding a window. When replacing windows homeowners should review the air leakage rating to ensure that their window choice offers them the lowest possible amount of air leakage.	+	'''Air leakage ratings''' provide an assessment of the rate at which air leaks into or out of a home due to gaps surrounding a window. When [[Replacement-Windows\|replacing windows]] homeowners should review the air leakage rating to ensure that their window choice offers them the lowest possible amount of air leakage.

−	== Air Leakage ==	+	== Measuring Air Leakage ==
	Rating a replacement window's air leakage refers to measuring the rate of air that moves around the window in the presence of a specific pressure difference. An air leakage rating is expressed in units of cubic feet per minute. A window product which displays a low air leakage rating is tighter than a window which displays a high air leakage rating. Industry observers suggest that when purchasing a window the homeowner should select a window with an Air Leakage rating of 0.30 or less.		Rating a replacement window's air leakage refers to measuring the rate of air that moves around the window in the presence of a specific pressure difference. An air leakage rating is expressed in units of cubic feet per minute. A window product which displays a low air leakage rating is tighter than a window which displays a high air leakage rating. Industry observers suggest that when purchasing a window the homeowner should select a window with an Air Leakage rating of 0.30 or less.

Simcha at 20:17, 7 February 2013

2013-02-07T20:17:08Z

← Older revision		Revision as of 20:17, 7 February 2013
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	\|data6 = Window (AL), Replacement Window Air Leakage, Air Leakage Rating		\|data6 = Window (AL), Replacement Window Air Leakage, Air Leakage Rating
	\|header7 = Description:		\|header7 = Description:
−	\|data8 = A ratings provided by the ~~National Fenestration Ratings Council~~ to determine the percentage of air that will leak into ~~their~~ house through a replacement window.}}	+	\|data8 = A ratings provided by the NFRC to determine the percentage of air that will leak into a house through a replacement window.}}

	'''Air leakage ratings''' provide an assessment of the rate at which air leaks into or out of a home due to gaps surrounding a window. When replacing windows homeowners should review the air leakage rating to ensure that their window choice offers them the lowest possible amount of air leakage.		'''Air leakage ratings''' provide an assessment of the rate at which air leaks into or out of a home due to gaps surrounding a window. When replacing windows homeowners should review the air leakage rating to ensure that their window choice offers them the lowest possible amount of air leakage.

Simcha: /* Energy Star Windows */

2013-02-07T20:15:57Z

Energy Star Windows

← Older revision		Revision as of 20:15, 7 February 2013
Line 53:		Line 53:

	The criteria for tax credit-eligible windows varies according to the homeowner's climate. The Energy Star program identifies Energy Star windows according to the NFRC's U-Factor and Solar Heat Gain Coefficient ratings. Energy Star does not include the ratings for Air Leakage, Visible Transmittance or Condensation Resistance.		The criteria for tax credit-eligible windows varies according to the homeowner's climate. The Energy Star program identifies Energy Star windows according to the NFRC's U-Factor and Solar Heat Gain Coefficient ratings. Energy Star does not include the ratings for Air Leakage, Visible Transmittance or Condensation Resistance.
		+
		+
		+	[[Category:Replacement Windows]]

Simcha at 20:14, 7 February 2013

2013-02-07T20:14:58Z

← Older revision		Revision as of 20:14, 7 February 2013
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	\|data6 = Window (AL), Replacement Window Air Leakage, Air Leakage Rating		\|data6 = Window (AL), Replacement Window Air Leakage, Air Leakage Rating
	\|header7 = Description:		\|header7 = Description:
−	\|data8 = ~~Homeowners can use the Air Leakage~~ ratings provided by the National Fenestration Ratings Council to determine the percentage of air that will leak into their house through a replacement window.}}	+	\|data8 = A ratings provided by the National Fenestration Ratings Council to determine the percentage of air that will leak into their house through a replacement window.}}

−	Air leakage ratings provide an assessment of the rate at which air leaks into or out of a home due to gaps surrounding a window. When replacing windows homeowners should review the air leakage rating to ensure that their window choice offers them the lowest possible amount of air leakage.	+	'''Air leakage ratings''' provide an assessment of the rate at which air leaks into or out of a home due to gaps surrounding a window. When replacing windows homeowners should review the air leakage rating to ensure that their window choice offers them the lowest possible amount of air leakage.

	== Air Leakage ==		== Air Leakage ==

Simcha at 20:13, 7 February 2013

2013-02-07T20:13:55Z

← Older revision		Revision as of 20:13, 7 February 2013
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	{{Infobox		{{Infobox
−	\|title Window Air Leakage	+	\|title = Window Air Leakage
	\|image = [[File:Space holder.jpg\|215px\|alt=Window Air Leakage]]		\|image = [[File:Space holder.jpg\|215px\|alt=Window Air Leakage]]
	\|header5 = Other Names:		\|header5 = Other Names:

Simcha at 20:13, 7 February 2013

2013-02-07T20:13:42Z

← Older revision		Revision as of 20:13, 7 February 2013
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	\|data8 = Homeowners can use the Air Leakage ratings provided by the National Fenestration Ratings Council to determine the percentage of air that will leak into their house through a replacement window.}}		\|data8 = Homeowners can use the Air Leakage ratings provided by the National Fenestration Ratings Council to determine the percentage of air that will leak into their house through a replacement window.}}

−	Air leakage ratings provide an assessment of the rate at which air leaks into or out of a home due to gaps surrounding a window. When replacing windows homeowners should review the air leakage rating to ensure that their window choice offers them the lowest possible amount of air leakage.	+	Air leakage ratings provide an assessment of the rate at which air leaks into or out of a home due to gaps surrounding a window. When replacing windows homeowners should review the air leakage rating to ensure that their window choice offers them the lowest possible amount of air leakage.
		+
	== Air Leakage ==		== Air Leakage ==
−	Rating a replacement window's air leakage refers to measuring the rate of air that moves around the window in the presence of a specific pressure difference. An air leakage rating is expressed in units of cubic feet per minute. A window product which displays a low air leakage rating is tighter than a window which displays a high air leakage rating. Industry observers suggest that when purchasing a window the homeowner should select a window with an Air Leakage rating of 0.30 or less.	+	Rating a replacement window's air leakage refers to measuring the rate of air that moves around the window in the presence of a specific pressure difference. An air leakage rating is expressed in units of cubic feet per minute. A window product which displays a low air leakage rating is tighter than a window which displays a high air leakage rating. Industry observers suggest that when purchasing a window the homeowner should select a window with an Air Leakage rating of 0.30 or less.
		+
	=== Positive Air Leakage ===		=== Positive Air Leakage ===
−	Positive air leakage refers to the pressure that occurs when moist indoor air leaks into cavities which surround a window. This can happen through the exterior siding, the sheathing, the outlet box or through insulation. This air leakage causes moisture to condense on cold surfaces leads to a build-up of condensation on the window's interior.	+	Positive air leakage refers to the pressure that occurs when moist indoor air leaks into cavities which surround a window. This can happen through the exterior siding, the sheathing, the outlet box or through insulation. This air leakage causes moisture to condense on cold surfaces leads to a build-up of condensation on the window's interior.
		+
	=== Negative Air Leakage ===		=== Negative Air Leakage ===
−	Negative air leakage occurs when dry outdoor air leaks into the house and prevents moist indoor air from leaking out. Negative air leakage prevents moisture and condensation problems.	+	Negative air leakage occurs when dry outdoor air leaks into the house and prevents moist indoor air from leaking out. Negative air leakage prevents moisture and condensation problems.
		+
	== Air Leakage and Heat Loss and Heat Gain ==		== Air Leakage and Heat Loss and Heat Gain ==
−	Heat loss and heat gain occur when air infiltrates through cracks in the window assembly. The rate at which air filters into a house through the window unit is expressed as the Air Leakage (AL) rating. It measures in cubic feet of air as the air passes through a square foot of window area. The lower the Air Leakage rating, the less air will pass through cracks in the window assembly.	+	Heat loss and heat gain occur when air infiltrates through cracks in the window assembly. The rate at which air filters into a house through the window unit is expressed as the Air Leakage (AL) rating. It measures in cubic feet of air as the air passes through a square foot of window area. The lower the Air Leakage rating, the less air will pass through cracks in the window assembly.
		+
	=== Testing ===		=== Testing ===
−	At this time, the AL is an optional National Fenestration Ratings Council rating and is not included in the Energy Star Program. The NFRC often tests and lists the AL on a window's label for code compliance purposes and to provide the customer with data that he will need to make an informed decision when he is preparing to purchase a replacement window.	+	At this time, the AL is an optional National Fenestration Ratings Council rating and is not included in the Energy Star Program. The NFRC often tests and lists the AL on a window's label for code compliance purposes and to provide the customer with data that he will need to make an informed decision when he is preparing to purchase a replacement window.
		+
	== Variants ==		== Variants ==
	Air leakage rates for a replacement window vary, depending on environmental factors (humidity, temperature, pressure, barometric, quality control, operating style differences, usage-stresses, long term durability, methods of installation, and design/material selection. The air leakage measurements are primarily intended for purposes of product comparison.		Air leakage rates for a replacement window vary, depending on environmental factors (humidity, temperature, pressure, barometric, quality control, operating style differences, usage-stresses, long term durability, methods of installation, and design/material selection. The air leakage measurements are primarily intended for purposes of product comparison.

Simcha at 20:13, 7 February 2013

2013-02-07T20:13:06Z

← Older revision		Revision as of 20:13, 7 February 2013
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−	{{Infobox	+	{{Infobox
	\|title Window Air Leakage		\|title Window Air Leakage
−	\|image = [[File:Space holder.jpg\|215px\|alt=~~Block Glass Windows~~]]	+	\|image = [[File:Space holder.jpg\|215px\|alt=Window Air Leakage]]
−	\|header5 = ~~Window Air Leakage~~	+	\|header5 = Other Names:
−	\|data6 = Window (AL)	+	\|data6 = Window (AL), Replacement Window Air Leakage, Air Leakage Rating
	\|header7 = Description:		\|header7 = Description:
	\|data8 = Homeowners can use the Air Leakage ratings provided by the National Fenestration Ratings Council to determine the percentage of air that will leak into their house through a replacement window.}}		\|data8 = Homeowners can use the Air Leakage ratings provided by the National Fenestration Ratings Council to determine the percentage of air that will leak into their house through a replacement window.}}

Simcha: moved Air-Leakage to Window-Air-Leakage

2013-02-07T20:09:09Z

moved Air-Leakage to Window-Air-Leakage

← Older revision

Revision as of 20:09, 7 February 2013