Fire valve requirement

[WHPES]

How long is a piece of string? No two jobs are the same. It depends on what remedial work is needed. It's not simply a case of taking out a boiler and putting a new one in. The original system for a start needs all the sludge cleaning and flushing out (you wouldnt' put a new engine in your car and put the old oil back in). The controls and system design needs to meet current safety and energy efficiency requirements (or you won't get the full benefit of an upgrade and save as much money on heating as you should). Your radiators may not have thermostatic radiator valves, your system may not have an automatic bypass fitted or have independent heating and hot water controls if it's old . Insulation may be lacking, you may have an old style wheel room thermostat, you probably don't have a system water filter fitted etc etc etc. (you wouldn't run Windows 95 on a brand new laptop) As for the requirement for a fire safety valve, a remote sensing valve has been mandatory since about 1999, and prior to then, a fusible head fire valve has been mandatory since the 1980s. Lack of one may invaluidate any fire insurance cover you may have.