Components for heating, ventilating and air conditioning systems, namely, thermostats and electrical pressure regulators for controlling temperature and air flow, electrical junction boxes, and electrical power and control cables

Components for heating, ventilating and air conditioning systems, namely, air diffusers for distributing the direction of flow of air, ventilation grills and heat registers, air valves for air conditioners, variable air volume (VAV) damper valves for air conditioners, thermostatic valves as parts of heating installations, fan powered electric space and hot water heaters, and electric bypass ventilating exhaust fans