157842 ⎘
Hot-air central heating systems ; Exhaust gas central heating systems operating without discharge of hot air into the space or area to be heated
Sub-classes:INFRARED HEATING SYSTEM
#2COMBINED HEATING AND COOLING SYSTEM
#3Use of a rope of fibrous plant material as combustible material
#4Radiant heat reflector wing
#5Method and device for adjusting the temperature and hygrometry inside a building
#6Compact and Efficient Heat Exchanger, Furnace, HVAC Unit, Building, and Method of Making