73133384
Jul 11, 1977
Dec 12, 1978
SOLAR HEATING SYSTEMS AND INDIVIDUAL COMPONENTS, VIZ, SOLAR COLLECTOR PANELS, FLUID CIRCULATING TYPE, DOMESTIC HOT WATER PREHEATER, ATR TRANSPORT AND SWITCHING UNIT, COMPRISING CENTRIFUGAL FAN AND MOTORIZED VALVES, AND LOGIC CONTROL UNIT
Environmental Control Apparatus