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Central Heating Boiler Replacement Case Study

  • Site Location : Marlow, Buckinghamshire
  • Application : Replacement Boiler & System Upgrade
  • Date of Installation : March 2011

Client Brief
To resolve a long-standing problem on the client’s central heating system. Our Client explained that despite engaging with numerous heating companies over the last ten years, nobody had quite managed to get their heating system to work satisfactorily.

The system had always struggled to function which became particularly noticeable during cold snaps, predominantly affecting the ground floor radiators. Many attempts to solve this problem had been made unsuccessfully over an extended period of time – to great cost and no satisfactory conclusions. The client also said that in addition to the long term problems, he had recently noticed possible signs of water leakage from the ground floor heating pipe work within the concrete ground floor.


From gaining this information from our client it became clear the system had been poorly operating ever since the current boiler was originally installed. We also learnt that when the current boiler was installed twelve years previously it was relocated to a new position. To the naked eye the system appeared to be installed correctly, but many pipes were concealed so we could not conclude this without further investigation.


We suggested the following course of action:

  1. Inspect the current boiler and check its operation and heat output
  2. Check all existing heating and hot water controls & check their operation
  3. Remove some panelling and flooring and check the original pipe work installation and correct if necessary
  4. To disconnect the two ground floor radiators and make the leaking pipework under the floor redundant
  5. To run new pipework to the living room radiator


We ultimately found that this installation had a fundamental piping error that was installed out twelve years previously. The client also had leakage and damage on their existing boiler and chose to replace it with a new high efficiency Worcester Bosch 18Ri condensing boiler. We also upgraded the controls and installed a new hot water cylinder, and corrected the underlying error in the pipework to provide an extremely efficient and reliable system – complete with a five year warranty on the boiler.
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