Active solar space heating systems
use solar energy to heat liquid or air, and transfer the solar heat directly to a home or to a storage system for later use. An auxiliary or back-up system typically provides additional heat. Active solar systems are used with radiant heating systems, boilers with hot water radiators, or to supplement forced air heating systems.
Federal, local, or utility programs may offer incentives
for installing certain energy-efficient devices in your home.
Photo credit: National Renewable Energy Laboratory, USDOE