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.

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. www.milgard.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. www.marvin.com. .