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Product Review: Windows

8 sustainable glazing products

Product Review: Windows

8 sustainable glazing products

  • Hurd. An online glossary and comparative chart of various insulating glass options supplements printed materials that illustrate and explain the best use of each option for residential projects. The company also offers continuing education courses through www.aecdaily.comen2 and in person via its Architectural Services Group. Pictured Fixed windows with ComfortGlaze glass and dividedlight grilles. 800.223.4873. www.hurd.com.

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    Hurd. An online glossary and comparative chart of various insulating glass options supplements printed materials that illustrate and explain the best use of each option for residential projects. The company also offers continuing education courses through www.aecdaily.comen2 and in person via its Architectural Services Group. Pictured Fixed windows with ComfortGlaze glass and dividedlight grilles. 800.223.4873. www.hurd.com.

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    Hurd. An online glossary and comparative chart of various insulating glass options supplements printed materials that illustrate and explain the best use of each option for residential projects. The company also offers continuing education courses through www.aecdaily.com/en/2 and in person via its Architectural Services Group. Pictured: Fixed windows with ComfortGlaze glass and divided-light grilles. 800.223.4873. www.hurd.com.

  • Pella. The companys Web site provides information about basic performance options and benefits the best use of its Insulshield windows energy tax credits and a complete list of products that qualify for those credits. Its Architectural Services Division also offers consultations and tools to select products. Pictured Architect and Designer series casement and fixed units. 800.374.4758. www.pella.com.

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    Pella. The companys Web site provides information about basic performance options and benefits the best use of its Insulshield windows energy tax credits and a complete list of products that qualify for those credits. Its Architectural Services Division also offers consultations and tools to select products. Pictured Architect and Designer series casement and fixed units. 800.374.4758. www.pella.com.

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    Pella. The companys Web site provides information about basic performance options and benefits the best use of its Insulshield windows energy tax credits and a complete list of products that qualify for those credits. Its Architectural Services Division also offers consultations and tools to select products. Pictured: Architect and Designer series casement and fixed units. 800.374.4758. www.pella.com.

  • Simonton. Online tools include PDFs of the companys Energy Starqualified glass options across all product lines by climate zone and of those that qualify for federal tax credits. The site features a description of the components employed to achieve efficient windows and a downloadable consumer brochure about Energy Stars window certification program. Pictured ProFinish Brickmould 600 series. 800.746.6686. www.simonton.com.

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    Simonton. Online tools include PDFs of the companys Energy Starqualified glass options across all product lines by climate zone and of those that qualify for federal tax credits. The site features a description of the components employed to achieve efficient windows and a downloadable consumer brochure about Energy Stars window certification program. Pictured ProFinish Brickmould 600 series. 800.746.6686. www.simonton.com.

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    Simonton. Online tools include PDFs of the company's Energy Starqualified glass options across all product lines by climate zone and of those that qualify for federal tax credits. The site features a description of the components employed to achieve efficient windows and a downloadable consumer brochure about Energy Star's window certification program. Pictured: ProFinish Brickmould 600 series. 800.746.6686. www.simonton.com.

  • AMSCO. The company provides performance data for all of its window products online and offers a section to help educate consumers about highperformance windows including a glossary of window terminology. Demonstration kits for its dealer network show the difference between clear glass and the manufacturers CozE highperformance glass. Pictured Renaissance series composite windows. 888.822.6726. www.amscowindows.com.

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    AMSCO. The company provides performance data for all of its window products online and offers a section to help educate consumers about highperformance windows including a glossary of window terminology. Demonstration kits for its dealer network show the difference between clear glass and the manufacturers CozE highperformance glass. Pictured Renaissance series composite windows. 888.822.6726. www.amscowindows.com.

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    Krause Johansen

    AMSCO. The company provides performance data for all of its window products online and offers a section to help educate consumers about high-performance windows including a glossary of window terminology. Demonstration kits for its dealer network show the difference between clear glass and the manufacturer's CozE high-performance glass. Pictured: Renaissance series composite windows. 888.822.6726. www.amscowindows.com.

  • Owens Corning. The company eschews a onesizefitsall approach with online tools and glazing options within its new Innovision series to match window performance values to each elevationexposure and optimize energy efficiency and comfort. Also available is a downloadable Manufacturers Certification Document to supplement purchase receipts to help claim energy tax credits. Pictured Innovision fiberglass windows. 800.438.7465. www.owenscorning.com.

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    Owens Corning. The company eschews a onesizefitsall approach with online tools and glazing options within its new Innovision series to match window performance values to each elevationexposure and optimize energy efficiency and comfort. Also available is a downloadable Manufacturers Certification Document to supplement purchase receipts to help claim energy tax credits. Pictured Innovision fiberglass windows. 800.438.7465. www.owenscorning.com.

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    Owens Corning. The company eschews a "one-size-fits-all" approach with online tools and glazing options within its new Innovision series to match window performance values to each elevation/exposure and optimize energy efficiency and comfort. Also available is a downloadable Manufacturer's Certification Document to supplement purchase receipts to help claim energy tax credits. Pictured: Innovision fiberglass windows. 800.438.7465. www.owenscorning.com.

  • JeldWen. The company a 2010 Energy Star Partner of the Year offers an energy resource section on its Web site with information on the energy tax credits a tutorial on glass performance guidelines on Energy Star zone requirements and a list of qualified models. The site also lists thermal performance ratings for all of its window products. Pictured Custom wood window with metal cladding. 800.535.3936. www.jeldwen.com.

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    JeldWen. The company a 2010 Energy Star Partner of the Year offers an energy resource section on its Web site with information on the energy tax credits a tutorial on glass performance guidelines on Energy Star zone requirements and a list of qualified models. The site also lists thermal performance ratings for all of its window products. Pictured Custom wood window with metal cladding. 800.535.3936. www.jeldwen.com.

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    Jeld-Wen. The company a 2010 Energy Star Partner of the Year, offers an energy resource section on its Web site with information on the energy tax credits, a tutorial on glass performance, guidelines on Energy Star zone requirements, and a list of qualified models. The site also lists thermal performance ratings for all of its window products. Pictured: Custom wood window with metal cladding. 800.535.3936. www.jeld-wen.com.

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    Mr. Janis Miglavs

    Milgard. Designed to take the guesswork out of optimizing window efficiency and matching units to the home’s climate, 3D/3D Max Energy Packages address energy efficiency through the three dimensions of a window: frame, product design, and glazing unit. Package components include technologies with low-E glass, argon gas fills, and proprietary foam spacers. Pictured: Fiberglass Ultra series. 800.645.4273. http://www.milgard.com/.

  • Andersen. The EcoExcel energy performance package includes all windows that qualify for the federal energy tax credit and an online service to verify compliance with the tax credit and save the manufacturers certification statement. Andersen also sponsors Windows in Sustainable Design Design Principles and Federal Tax Incentives an AIAapproved continuing education course at www.architectces.com. Pictured 400 Series Woodwright doublehung windows with LowE4 glass. 800.426.4261. www.andersenwindows.com.

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    Andersen. The EcoExcel energy performance package includes all windows that qualify for the federal energy tax credit and an online service to verify compliance with the tax credit and save the manufacturers certification statement. Andersen also sponsors Windows in Sustainable Design Design Principles and Federal Tax Incentives an AIAapproved continuing education course at www.architectces.com. Pictured 400 Series Woodwright doublehung windows with LowE4 glass. 800.426.4261. www.andersenwindows.com.

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    Krause Johansen

    Andersen. The EcoExcel energy performance package includes all windows that qualify for the federal energy tax credit and an online service to verify compliance with the tax credit and save the manufacturer's certification statement. Andersen also sponsors "Windows in Sustainable Design: Design Principles and Federal Tax Incentives," an AIA-approved continuing education course at www.architectces.com.  Pictured: 400 Series Woodwright double-hung windows with Low-E4 glass. 800.426.4261. www.andersenwindows.com.

  • Ply Gem. Online features primarily for consumers include a window search tool and a viewabledownloadable brochure about glass technology all windows qualify for tax credits. A software program for dealers includes the ability to simulate or confirm performance values and options. A special kit helps pros explain the tax credit to customers and includes a leavebehind to assist homeowners with claim paperwork. Pictured Mira Premium series. 800.999.8400. www.plygemwindows.com.

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    Ply Gem. Online features primarily for consumers include a window search tool and a viewabledownloadable brochure about glass technology all windows qualify for tax credits. A software program for dealers includes the ability to simulate or confirm performance values and options. A special kit helps pros explain the tax credit to customers and includes a leavebehind to assist homeowners with claim paperwork. Pictured Mira Premium series. 800.999.8400. www.plygemwindows.com.

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    Ply Gem. Online features, primarily for consumers, include a window search tool and a viewable/downloadable brochure about glass technology; windows can be configured to qualify for tax credits. A software program for dealers includes the ability to simulate or confirm performance values and options. A special kit helps pros explain the tax credit to customers and includes a leave-behind to assist homeowners with claim paperwork. Pictured: Mira Premium series. 800.999.8400. http://www.plygemwindows.com/.

  • Marvin. The Performance Education Handbook available online and in print includes design pressure DP ratings Energy Star ratings glass performance and NFRC certification and labeling for the companys entire product line among other performance topics. The site also lists products that qualify for energy tax credits. Pictured Aluminumclad wood windows. 800.346.3363. www.marvin.com.

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    Marvin. The Performance Education Handbook available online and in print includes design pressure DP ratings Energy Star ratings glass performance and NFRC certification and labeling for the companys entire product line among other performance topics. The site also lists products that qualify for energy tax credits. Pictured Aluminumclad wood windows. 800.346.3363. www.marvin.com.

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    Marvin. “The Performance Education Handbook,” available online and in print, includes design pressure (DP) ratings, Energy Star ratings, glass performance, and NFRC certification and labeling for the company’s entire product line, among other performance topics. The site also lists products that qualify for energy tax credits. Pictured: Aluminum-clad wood windows. 800.346.3363. http://www.marvin.com/.

Windows have come a long way from the single-pane, aluminum-framed units of 40 years ago. Today’s windows boast high-performance coatings, tints, gas fills, suspended films, spacers, and frame material options, with a variation of specs that enable pros to finely tune and optimize window placement and performance depending on a wall elevation’s orientation and exposure to the sun.

Except very few builders do that; the vast majority choose the same performance values for every window in the house. And why shouldn’t they? In addition to cost and convenience issues, the latest rules to qualify for federal energy tax credits and the Energy Star for Homes program make no distinction—and for the tax credits, not even for different climate zones—among window values and options beyond a maximum U-factor and solar heat gain coefficient (SHGC). Even the two prevailing green building certification rating systems, LEED for Homes and the National Green Building Standard, defer to National Fenestration Rating Council or Energy Star criteria for window values as a prerequisite to certification (albeit with climate zone and glazing ratio exceptions).

Both rating systems do offer extra credit for windows with higher performance values and allow “any” SHGC value in northern climates, but make only scant mention of passive solar design as a hedge against heating energy demand.

Setting and promoting common denominators for U-value and SHGC has, in turn, prompted window manufacturers to focus on selling products that meet those standards and qualify for tax credits and other financial incentives, even though they have every commercially available glazing configuration at their disposal.

“They want to supply one product for all orientations, or for the whole country,” says Dariush Arasteh, deputy leader of the Windows & Daylighting Group at Lawrence Berkeley National Laboratory (LBL). “It’s the most efficient thing for them to do in terms of manufacturing and distribution.”

Suppliers don’t disagree. “It’s more economical to buy and sell and stock the most popular glass options than stocking a wider range of glass,” says Kevin Vilhauer, an engineer with Milgard Windows.

Which begs the question: Are there enough reasons to consider each elevation’s exposure when specifying windows to offset the convenience and cost incentives, from tax credits to volume discounts, of ordering across-the-board performance values for the whole house?