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It''s clear that energy vunyl savings alone won''t justify window replacement (see "Other Considerations in Window Replacement"). If windows are to be replaced in any case, however, the analysis provides justification for an upgrade to high-performance glass. At a cost of $60 per window, the payback on low-e argon filled glass is a reasonable 9 years.And there are other issues to be considered. The companion study on window condition estimated the current value of deferred maintenance at over $1 million, which reduces the comparative cost of window replacement. Comfort and other effects may be difficult to quantify in dollar terms, but they have important costs and benefits. Energy saving is just one factor to be weighed in this complex and expensive decision.Energy savings resulting replacement directly from window replacement windows is just one of many things to consider in deciding whether and when to undertake a major window replacement project. Several other important vunyl factors are discussed below. This replacement kit makes replacing old, energy wasting windows, fast and simple. Each kit comes complete with two sash, two vinyl compression balances, one vinyl parting stop, two vinyl sash stops, and all necessary installation hardware. Sash are available primed for painting or aluminum clad replacement in assorted colors. Vinyl casement and awning windows now feature Truth Maxim commercial-grade hardware to make them easier to operate, says the firm. All casement and awning windows windows come standard with fold-down vunyl handles to provide extra room for drape and blind clearance replacement around windows. The firm manufactures numerous other products. 724-465-1800. www.gorell.com, Circle 195. Fusion-welded vinyl windows are perfect for new or remodeling applications because they resist water, corrosion, and mold, claims the firm. Available in white and almond, they feature removable nailing fins. Muntins windows are optional. The company also manufactures aluminum-clad and wood windows as well as patio doors. 800-877-9482. www.summit windows.com. Circle 184. Kolbe & Kolbe Millwork offers vinyl windows. vunyl The Wausau, Wis.based, high-end wood window manufacturer will supply a wide selection of vinyl window designs - radius, replacement bow, bay and geometric - through its new KVW Windows & Doors division. The new line includes double hung models, sliders, casements, awnings and sliding doors. A new production plant, located in Manawa, Wis., was scheduled to begin operating in February. ProFinish vinyl windows come in double-hung, single-hung, casement, slider, picture, and geometric-shaped styles. The windows, which won''t pit, peel, or chalk, claims the maker, feature welded frames and sashes and integral J-channels. Numerous windows glass vunyl options and grids are available. 800-542-9118. www.simonton.com. Circle 182. Monument vinyl windows come in white and almond and feature fusion-welded mitered corners and multiple hollow chambers for strength, says the firm. The windows come in casement, awning, double-hung, single-hung, and sliding styles. A number of glazing and glass options are available. 800-223-4873, www.hurd.com. Visions 2000 vinyl windows are maintenance-free and won''t rust or corrode, replacement and windows says the firm. The windows are available in single-hung, double-hung, casement, and awning styles. The line comes standard with integral vunyl nailing fins and replacement fusion-welded corners. Optional grilles and glazes also are available. To do this, we selected CONTAM, a program developed by the National Institute for Standards and Technology and available flee through its Web site (see information at the end of this article). windows CONTAM calculates instantaneous vunyl values of air flow through openings in replacement buildings, using the flow characteristics of each windows opening, orientation, height, and other factors, based on a weather file that provides temperature and vunyl wind information. replacement We set up our CONTAM runs to calculate air flow for each hour of the typical year, and then summarized the results by month.To complete the energy simulation inputs, windows we gathered information on building envelope construction and estimated vunyl appliance loads, hot water usage, and occupancy for each unit replacement type. Water-to-air heat pumps installed in each unit provide heating and cooling at McLean Gardens. Six central plants equipped with boilers and cooling towers provide conditioned water at roughly 70[degrees]F to the heat pumps windows as a source or sink for energy. We took advantage of Visual DOE''s ability to model this system by grouping an upper, middle, and lower unit together with a central plant for each analysis.
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