Sun Power
Designed to pull double duty, Solar Roof is a solar energy source that the manufacturer has integrated seamlessly into its concrete roof tiles. The tiles are lightweight and durable enough to withstand 125-mile-per-hour winds when installed with wind clips and come with a 25-year limited power output warranty and protection against water intrusion. Eagle Roofing Products. 909-355-7000.

Mirror Mirror
NanaWall WD66 wood folding door system is now available with Heat Mirror glazing for thermal performance in any climate and any season, the manufacturer says. The Energy Star-rated glazing is filled with krypton and has a U-factor of .23 and a solar heat gain coefficient of .31. Available as a top-hung or floor-mounted system, the doors  can create openings 8 feet to 40 feet and are available in a variety finishes and interior wood species such as Douglas fir and pine. NanaWall Systems. 800-873-5673.

Heat It
These solar energy roof collectors can provide a home with up to 80 percent of its hot water needs, the manufacturer says. The system consists of the collector panels and a storage tank with a built-in heat exchanger to produce hot water even at low temperatures. Hot water holding tanks are available in 80- and 120-gallon sizes. Velux America. 800-888-3589.

Nigel Maynard is senior editor, products, at BUILDER magazine.

Learn more about markets featured in this article: San Francisco, CA.