The air-to-air heat exchanger (a fan powered ventilation device that recovers heat from stale outgoing air) is explained in this six-part publication. Topic areas addressed are: (1) the nature of air-to-air heat exchangers and how they work; (2) choosing and sizing the system; (3) installation, control, and maintenance of the system; (4) heat…

This manual is the fourth volume in a series of publications that provide information for the planning of environmentally sound small-scale projects. Programs that aim to protect the renewable natural resources that supply most of the energy used in developing nations are suggested. Considerations are made for physical environmental factors as…

Presented is an annotated bibliography of energy-related materials for the consumer. Materials (which include books, videotape recordings, magazines, pamphlets, and other media) are arranged by subject area. These area include: (1) earth sheltered buildings; (2) fuels; (3) general (including general energy conservation and insulation); (4) heat…