SMART DUCT SYSTEM

Heating, ventilating and air-conditioning equipment and accessories, namely, fresh air blower and duct units, automatic furnace chimney vent dampers for residential use; condenser units and evaporator coils as parts of heating and cooling installations fired by gas, electricity and oil; low to medium static pressure hot-air and cold-air condenser/blower/compressor combination for the residential market; air conditioners, electric heaters, combination heating/cooling units, electric furnaces, heat pumps, gas furnaces, and oil furnaces; oil burning house heating units and furnaces; forced warm air furnaces, furnaces, air conditioning units, electronic household air cleaners and humidifiers, residential ventilation apparatus, residential air distribution unit