Products and equipment in the nature of Domestic and commercial heating, cooling and ventilating equipment and systems, namely, furnaces, heat exchangers not being parts of machines, electrical strip heaters, radiant heating systems, heat pumps, air conditioning units, evaporative air coolers, and portable air conditioners, geothermal heat pumps, electric unit heaters, HVAC units

Domestic and commercial heating, cooling and ventilating equipment and systems, namely, furnaces, heat exchangers, electrical strip heaters, radiant heating systems, heat pumps, air conditioning units, evaporative coolers, and portable air conditioners

gas fired warm air furnaces for use with natural gas or liquefied petroleum, for use in residential or in commercial locations

room air-conditioners

gas fired warm air furnaces for use with natural gas or liquified petroleum for use in residential and commercial locations

unit heaters by which is meant a heater designed to be suspended in the space to be heated and embodying means for heating and circulating air

METAL DUCTS AND JOINTS, COUPLINGS, BAND CLAMPS AND FLEXJOINTS THEREFOR

FLOW AND PRESSURE REGULATORS, AND CONDUIT COUPLINGS

APPARATUS FOR CONDITIONING AIR CONSISTING OF OR COMPRISING COOLING APPARATUS

CONVERSION BURNERS

GRAVITY TYPE WARMAIR FURNACE BY WHICH IS MEANT A FURNACE NORMALLY LOCATED OUTSIDE OF THE ENCLOSURE BEING HEATED AND DEPENDING PRIMARILY ON CIRCULATION OF AIR BY GRAVITY

FAN TYPE WARM-AIR FURNACES BY WHICH IS MEANT A FURNACE NORMALLY LOCATED OUTSIDE OF THE ENCLOSURE BEING HEATED AND EMBODYING A FAN FOR CIRCULATING AIR TO AND FROM THE ENCLOSURE

AIRCRAFT HEATERS, BY WHICH IS MEANT A HEATER DESIGNED TO HEAT AIRCRAFT FOR PASSENGER COMFORT

UNIT HEATERS BY WHICH IS MEANT A HEATER DESIGNED TO BE SUSPENDED IN THE SPACE TO BE HEATED AND EMBODYING MEANS FOR HEATING AND CIRCULATING AIR

GAS-BURNING APPLIANCES ADAPTED FOR CONVERTING HOUSE-HEATING FURNACES ORIGINALLY DESIGNED FOR BURNING SOLID FUEL INTO GAS-FIRED FURNACES BY REMOVING THE FUEL GRATES

Aircraft cabin heating systems comprised of a main heater assembly, combustion air assembly, fuel pump, fuel pressure regulator and cabin control switch, sold together as a unit