The automatic air vent is a pressure safety device in the central heating unit. They work by using buoyancy to release built up air. As water flows through the heating/cooling system a float within the aav (automatic air vent) opens or closes dependant onC
The automatic air vent is a pressure safety device in the central heating unit. They work by using buoyancy to release built up air. As water flows through the heating/cooling system a float within the aav (automatic air vent) opens or closes dependant on
![FALCON GAS REFILL LIQUEFIED PETROLEUM GAS PER KG (COPPERBELT) [REFILL AT LOCATION ONLY]](https://www.gasheatpro.com/wp-content/uploads/2025/9/1758276817/falcon-gas-refill-liquefied-petroleum-gas-per-kg-copperbelt-refill-at-location-only-1758276820.webp)
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