West 1 Gas and Plumbing Ltd

How to bleed a radiator?

Ideally turn off the boiler, radiators and the thermostats and allow system to cool. Hot water in the radiators will be under pressure, not ideal whilst bleeding. Locate the bleed valves, usually at the top corner/edge of the radiators. Have ready a some tissue to wipe up any drips. Use a radiator key to open valve until you hear air being released for the valve. This will be a noticeable "hissing" sound. Once water appears you know all the air has left the radiator, therefore turn the key to close the valve. Check your boiler's pressure gauge and top up were necessary via the filling loop. If in doubt consult a qualifed heating/gas engineer.

What is the best combi boiler?

I personally think the Viessmann Vitodens 100 is the best combi boiler. It's highly energy efficient (rated A for boiler efficiency - where up to 94% of fuel is converted into heat), compact, quiet, affordable and it also comes with a warranty of up to 10 years, covering for all parts and labour.

What are the benefits of installing an unvented cylinder?

The main benefit of an unvented cylinder is mains pressure hot water, on demand, providing good pressure at your showers and taps. There is also no need for a cold water storage tank in the loft, which frees up space in your loft. The removal of this tank in your loft also gets of the rid of the risk of a contaminated water supply.