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/.
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/.
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/.