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Triple-glazed windows for dual-glazed price!

posted Oct 25, 2011, 10:48 AM by Kelvin Chin   [ updated Nov 16, 2011, 8:28 AM ]
GreenWorld Windows' Venetian series "R-5" triple-pane windows are now on sale through the end of the year for the same price as dual-glazed "leading-brand" windows.  For example, a 48" x 48" window including taxes & installation is only $473.00!  *When windows are purchased for the entire home.

- Reduces average heat loss by 30% compared to common ENERGY STAR dual-pane windows and improves occupant comfort.
-Depending upon the structure, triple-pane R-5 windows can moderately to significantly lower noise levels compared to standard dual-pane windows.
- Incredibly energy-efficient: a U-factor of 0.22 or less.  Current Energy Star qualified windows have a U-factor of around 0.3 only.

Example of R-5 Savings at Work:
 In a typical new 2,400 sq. ft. Massachusetts home, simulations show that R-5 windows save about $100/year even when compared to energy-efficient, code-compliant double-pane low-E windows. In addition to lifetime savings, R-5 windows may offer up-front savings by allowing for smaller heating and cooling systems. In addition, much greater saving can be achieved when an R-5 window is used to replace a degraded window in an existing home. [Source: US DOE]

Lifetime (20 yr.) savings per 3' x 5' window with U-factor 0.22
Assuming a 3% discount rate after adjusting for inflation

Horizontal bar chart with marginal cost (MC) and marginal savings (MS) per window for 3 window types in Boston, MA: a hi-volume R-4 window has a MC < $50 and MS > $60; a current (low-volume) high performance window has a MC of ~ $120 and MS slightly less; a hi-volume high performance window has a MC of ~ $60 and MS of ~ $110.

Horizontal bar chart with marginal cost (MC) and marginal savings (MS) per window for 3 window types in Minneapolis, MN: a hi-volume R-4 window has a MC < $50 and MS > $50; a current (low-volume) high performance window has a MC of ~ $120 and MS < $100; a hi-volume high performance window has a MC of ~ $60 and MS of slightly < $100.

Horizontal bar chart with marginal cost (MC) and marginal savings (MS) per window for 3 window types in Spokane, WA: a hi-volume R-4 window has a MC < $50 and MS > $50; a current (low-volume) high performance window has a MC of ~ $120 and MS < $100; a hi-volume high performance window has a MC of ~ $60 and MS of slightly < $100.
Source: [US DOE]

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