Sunspace / attached greenhouse
A glazed south-facing room that captures solar heat in a large volume, serving as a warm winter living space, a thermal buffer for the house, and a solar collector — closeable at night so it doesn't drain heat.
A glazed south-facing room that captures solar heat in a large volume, serving as a warm winter living space, a thermal buffer for the house, and a solar collector — closeable at night so it doesn't drain heat.