Unvented Central Heating System

In a vented heating system at the highest point in the system there is at least one header tank.

Unvented central heating system.

Supply pressure should be around 2 bars and able to supply the required flow rates. It has a loose fitting lid and is partially filled with water. With unvented systems there is no need for a cold storage tank which helps free up space and requires much less pipework. A header tank is a small tank usually black that is usually installed in the loft.

What is an unvented megaflo boiler system. A megaflo system which is commonly misspelt or heard as a megaflow system is a hot water cylinder made of stainless steel. A megaflo also known as a megaflo system megaflo unvented system or often misspelt as megaflow system or megaflow boiler is a stainless steel unvented cylinder that stores hot water as part of a central heating system. The megaflo hot water cylinder also known as the megaflo water heater is unvented and stores hot water as part of the central heating system that your home has.

Vented central heating systems versus unvented pressurised heating system. Before you begin turn off your boiler at the mains power supply and let the water in the entire system cool down. An unvented hot water cylinder is a pressurised system which is fed directly from the cold mains water feed and therefore can deliver hot water at mains pressure which is great for improving the performance of your shower and bath.