7
(( Turbines; )) Refrigerant Compressors; and Parts Therefor
9
Electrostatic Air Filters; Electrical, Mechanical, and Pneumatic Controls for Heating and Air Conditioning Equipment; Electrical Controls for Controlling the Charge in Refrigeration Systems; and Parts Therefor
11
Refrigeration Units; Fluid, Air, and Water Heaters and Coolers for Domestic, Commercial, and Industrial Uses; Air Delivery and Handling Units for Cooling; Heating, and Ventilating Domestic, Commercial, and Industrial Buildings, and for Use in Commercial Process Applications; Air Induction Units; Air Filters, Humidifiers, Ventilators, Diffusers, Blenders, and Convectors; Refrigerant Condensers, Evaporators, and Absorbers; Fans and Blowers; (( Boilers; )) Electric, Gas, and Oil furnaces; Heat Pumps; Hydrocarbon Fuel burners, Incinerators; Heat Exchangers for use in Heat Transfer for Industrial and commercial Uses; Shell and Tube, Fin and tube, and Plate and Fin Heat Exchangers; and Parts Therefor
37
Repair and Maintenance of Heating and Air Conditioning Equipment
42
Rental of Tools for the Repair of Heating and Air Conditioning Equipment; Chemical and Metallurgical Analysis of Heating and Air Conditioning Equipment; Analyzing the Heating and Air Conditioning Requirements of Others by Means of a Computer; and Consulting Services in the Field of Heating and Air Conditioning Requirements
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