allred johnny (3 resultados)

Stapled Wraps. Condición: Very Good. Black and White Photos, Drawings, Charts and Diagrams Ilustrador. Covers faded and lightly edge-rubbed; textblock clean; 56p. This report describes the design, construction, testing, and economic analysis of a low-cost solar heating system. Background information is given in the report to help a specially skilled homeowner understand how a solar collector works and what it can be used for. Assembly instructions for the homeowner are given in the appendixes. Size: 4to - Over 9 " - 12" Tall. Paperback.

Softcover. Condición: Very Good. Stapling is solid and not eating into cardboard cover. Pages are unmarked and barely aged. Cover is only a little worn. ; Nasa Technical Memorandum; 56 pages.

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).