Introductory technical guidance for mechanical engineers and others interested in solar powered central hot water systems for multi-building complexes such college campuses, condominiums and military bases. Here are case studies that are discussed:1. FPC-15: APARTMENT BUILDINGS MAGDEBURGER STRABE, HANNOVER, GERMANY2. FPC-16: RESIDENTIAL AREA "BURGHOLZHOF," STUTTGART, GERMANY3. FPC -17. SOLAR THERMAL DISTRICT ENERGY SYSTEM AT SAINT PAUL, MN4. ETC-1:...