The automatic air vent is a pressure safety mechanism in the central heating unit. They work by using a float to release accumulated air. As water circulates through the heating/cooling system a float within the aav (automatic air vent) opens or closes dependant on the current water level. If the system contains only water, the float is pushed to the top and the vent will be closed until the water level drops.
- Fits the Ideal Domestic Mini C24, C28, S24 and S28
- Fits the Ideal Domestic Mini He C24, HE C28 and HE C32