MS Heating and Plumbing Services

Open Vent Boilers (Heat only Boilers)

Work in conjunction with a hot water storage cylinder and cold water top up tanks to provide both central heating and hot water. Open vent boilers are a peculiarly British invention. An open vent (sometimes known as heating only) provide central heating and hot water via a boiler, a storage cylinder housed in the airing cupboard and water tanks in your loft.

If you're looking to do a full system overhaul most people opt to remove the tanks from the loft and turn their open vent system into a sealed system.

Most suited to: Larger homes with an existing open vent boiler. Usually available in following outputs: kw 12 15 18 24 30 38

 

 

Benefits:

High flow rate for domestic hot water

More than one hot tap / shower can easily operate at same time

 

Disadvantages:

Once the water in the storage cylinder runs out you have to wait for it to reheat.

You'll need to find space for the cylinder (usually an airing cupboard)

The bulk feed and expansion tanks are usually sited in the loft