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A VAV (Variable Air Volume) box resides inside an air conditioning system and controls air flow. Like an electronic thermostat, VAV systems vary air flow in response to a change in temperature of the HVAC unit. A pressure transducer senses different levels of pressure within a VAV box, and adjusts accordingly. There are VAV dual pressure controls or dual duct systems as well. VAV systems can also control the heating and cooling of water. And we have the cooling equipment relays to make sure the coolness keeps on coming. Zoro has the VAV water level controls and accessories and pilot and ignitor components you need to keep your HVAC system running efficiently.