9
Electronic speed controller for fans; electronic control systems comprised primarily of microprocessing components, software drivers, binary staged controllers, silicon control rectifiers SCR and electronic modulating controllers EMC; digital velocity controller for use in HVAC systems; digital modulating temperature controllers and sensors for use in HVAC
11
HVAC equipment, namely, grilles, heat registers, diffusers, fans, fan coils, heating coils, hot water reheat coils, mechanical control systems comprised primarily of pneumatic and digital velocity controllers, air handlers, variable volume terminals, boilers, air conditioners, single duct terminals, filters, radiant panels, chilled sails, chilled beams and radiant heaters, under floor heating systems comprised primarily of grilles, diffusers and fan powered terminal units
37
Repair and maintenance of HVAC equipment
42
Application engineering in the field of HVAC; and design services, namely, designing air distribution systems and equipment; and designing HVAC equipment
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