HVAC units for air cooling, namely, air conditioners, split system HVAC units, condensing units being HVAC units, dedicated outdoor air units being air conditioning units, dedicated outdoor air systems comprised of electric and gas heating controls, dedicated outdoor atmospheric environment units in the nature of air cleaning units, and dedicated outdoor atmospheric environment systems comprised of air purification units and air conditioning units; HVAC systems, namely, dedicated outdoor air systems comprised of HVAC units and controls; dedicated outside air systems (DOAS) units comprising electric heating fans and heat pumps; HVAC equipment and accessories, namely, heating and cooling equipment comprising heat recovery ventilators (HRV) systems comprised primarily of heat recovery ventilators, dedicated outdoor air systems (DOAS) units comprising heat pumps and controls, cooling equipment comprising split system air conditioners, HVAC condensing units, heat pumps, and rooftop air handlers; Cooling systems comprised of air handler units and condensate systems consisting of condensate pumps, condensate drain pans, evaporator coils, condenser coils and refrigerant lines; air conditioners; electronic air generators for use in controlling the amount of humidity in the air; dehumidifiers; desiccant dehumidifiers; make up air units for relieving negative room air pressure; energy recovery equipment, namely, air-to-air energy recovery wheels; plate heat exchangers; air handlers; heaters, namely, electric warm air portable space heaters and electric warm air room cabinet heating units; HVAC rooftop units; electric heating fans; duct heaters for installation in rooftop HVAC systems; portable air conditioners; portable electric heaters; portable heat pumps