Re: Biloer Question
Stingo,
If it is a normal boiler it is vented to the header tank in the loft. If it is a combi it will have a pressure relief valve.
The reason to vent the air is that 1. it will stall the pump. 2. air in the system really reduces the heat transfer between the water and the radiators. 3. It makes really annoying noises when the boiler fires up in the morning.
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