Search Results: an inexpensive economical solar heating system by johnny w allred

Washington, D.C.: National Aeronautics and Space Administration, 1976. Binding faded and lightly edge-rubbed; textblock clean; 56 pp.. Wraps. Good. Illus. by Black and White Photos, Drawings, Charts and Diagrams. Quarto. Paperback.

Washington, DC: NASA, 1976. First edition. Paperback. Very Good. Washington, D.C.: National Aeronautics and Space Administration, 1976 / copy of NASA research report issued by US Dept of Commerce National Technical Information Service. Illustrated with photos, charts, and diagrams. Near Fine with minor sunning and a note on the cover that the book was recommended in a “Hudson Home” magazine article inn 1977. Contents clean and crisp.

Washington, DC: NASA, July 1976. Illustrated by b&w photographs, line drawings and charts. First edition. Langley Research Center. Blue stapled wraps. Large Post 4to (27cm). pp. 56. Appendices, References. Near Fine. Edge sunned top cover and short repaired rear tear, internally fine, no ownership or marking. Three part report: 1. Background of Solar Heating 2. System built at Langley designed to supply 40% heating for 1500sq.ft. home. "Experience indicates that is more cost effective at this time to supply approximately one-half of the heating load than to attempt to use solar energy to meet the full home heating demands." (cost at the time was $2000) 3. Information for the homeowner for construction (designed for use with existing in forced hot water system)..