Advanced Window Products – A Key Strategy to Save Energy, Save Money, and Mitigate Carbon

Advanced Window Products – A Key Strategy to Save Energy, Save Money, and Mitigate Carbon June 11, 2009 P. Marc LaFrance, CEM Technology Development Manager Building Technology Program Office of Energy Efficiency and Renewable Energy US Department of Energy

Facing our Energy Challenges “ The energy challenges our country faces are severe and have gone unaddressed for far too long. Our addiction to oil doesn’t just undermine our national security and wreak havoc on our environment – it cripples our economy and strains the budgets of working families all across America.” White House Energy Statement “ We're using 19th and 20th century technologies to battle 21st century problems like climate change and energy security.” Remarks of President Barack Obama, Signing of the American Recovery and Reinvestment Act, February 17, 2009

US Energy in Buildings Total US Building Envelope Energy Loss: 14.1 quads (Windows ~ 4 quads) 14.1% of Energy in US Economy and about 3.5% of the world. $133 Billion Annually Electricity – 72% for Buildings $370 Billion Annually Natural Gas – 55% for Buildings

Building Consumption – Window Relationship Consume about 10-15% of building energy Have Impact on 57% of Loads

Building Technologies Goal

Net-Zero Energy Buildings by 2025

Net-Zero Energy Homes by 2020

Low incremental cost.

Capacity from Buildings for Transportation

Advanced windows save natural gas and electricity to free up capacity for bridging fuels.

Achievements: The Low-E Success Story

Transparent metal coating

Reflects heat back inside in winter

Reflects solar heat out in summer

Allows day light

Reduces window energy by 30-65%.

Very low cost

Wide spread technology (60% of residential windows)

Main attribute of code compliant windows

Still needed for advanced windows

2009-2010 Fenestration Tax Credit

Raised limit for home improvements to $1500

Increased to 30 percent of product cost

Does not cover installation costs

Removed individual caps on windows and doors

Established U-factor and SHGC at 0.30 or less

Took effect February 17, 2009

Window Technology Development

Next generation window - highly insulating - dynamic solar control

R10 future windows – possibly vacuum glazings

2006 Prototype – Concept Window (Highly Insulating and Dynamic R 5.6 (U value 0.18), SHGC 0.04 – 0.34) Low cost unsealed center lite

USA, September 2008

Dynamic Windows – Now Market Ready DOE Cooperative Agreement Prices will drop with greater production investment See www.sage-ec.com for more information

Advanced Aluminum Framing

Joint Project with DOE Cooperative Agreement

An energy efficient window system able to meet both high performing energy, structural, safety and security values

Low-E paint -- up to 14% improvement on window U-value

Advanced thermal-break system, enhanced foam filling

Visit TRACO’s website for more information at www.traco.com Example: Triple Pane w/ Krypton U value Center of Glass U value Fixed Window U value Casement Traditional Thermal break 0.11 0.27 0.47 Advanced Frame 0.11 0.19 0.26 Percent Improvement 29% 43%

The Potential Savings of New Technology

Example: existing residential window stock

These estimates, based on 2006 LBNL simulations, do not take into account heating and cooling energy use due to infiltration. Window Types Energy use (quads) / savings potential (%) Heating Cooling Total 2005 window stock (7% low-E) 1.30 0.94 2.24 2-pane, low-E 53% 46% 50% 3-pane, low-E 92% 47% 73% R-10, dynamic solar control 115% 80% 100%

Windows Volume Purchase www.R-5WindowsVolumePurchase.com R5 and Low E Storm Volume Purchase Develop Buyer Groups Develop Draft RFP Specifications with Buyers and Possible Manufacturer Bidders Issue RFP Make Awards for Purchasing Schedule Promote Winner’s Products with Partners

Oak Ridge National Laboratory / Building America Whole Building Demonstrations

Highly Insulated R5 (U value 0.20) Window Demonstrations

System affects – central ducts, reduced HVAC capacity, improved comfort

Next project – highly insulating (>R5) and dynamic solar control, Serious Materials and Sage Electrochromics

Key Conclusions

DOE is working to develop the next generation of materials and products to achieve zero energy buildings

R5 windows will be more economic for retrofit because labor cost are fixed -- marginal energy savings can be greater than marginal cost (compared to double pane low e)