7
Industrial robots for heating, ventilation and air conditioning (HVAC) cleaning; brushes, namely, as mechanical parts of or for use with a mechanical duct cleaning apparatus; filters for mechanical purposes for mechanical parts of industrial vacuum cleaners for ductwork and heating, ventilation and air conditioning (HVAC) systems; portable filtration heating, ventilation and air conditioning (HVAC) cleaning units comprised of an engine surrounded by a metal casing with a HEPA filter in the middle, together with external wheels for mobility purposes specifically for cleaning the HVAC systems; HEPA filters for use with industrial vacuum cleaners for cleaning ductwork
9
Heating, ventilation and air conditioning (HVAC) inspection cameras
11
Electrostatic air filters for removing allergens from the air; portable filtration heating, ventilation and air conditioning (HVAC) cleaning units comprised of an engine surrounded by a metal casing with a HEPA filter in the middle, together with external wheels for mobility purposes specifically for cleaning the air; filters for commercial heating, ventilation and air conditioning (HVAC) systems for cleaning the air
37
Commercial and residential air-duct cleaning; furnace cleaning; pressure washing, namely, the flushing of cooling, heating and air-conditioning generator coils in residential and commercial heating, ventilation and air conditioning (HVAC) systems; cleaning commercial and residential exhaust systems, namely, cleaning laundry dryer exhaust systems for residential and commercial buildings; cleaning stale air exhaust systems for fresh-air make-up systems for commercial buildings; cleaning dryer exhaust systems and heat recovery ventilation systems in residential buildings
42
Air quality control and testing
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