Condensing boilers interface with existing heating system in historic church
The gas consumption of an historic naval dockyard church in Chatham is expected to be reduced by more than 20% with the installation of a new heating system that includes two 120 kW condensing boilers supplied by MHS Boilers. The Ultramax PB boilers replaced aging cast-iron atmospheric boilers in what is now the St George’s Centre, while retaining the existing pipework by interfacing to it via a built-in plate heat exchanger.
Dave Callcott of MHS Boilers designed the heating system and overcame the issues of special flueing requirement in a listed building with boilers located in the basement. He explains, ‘As the former chapel is a listed building, the existing chimney had to be used. To ensure that the products of condensation did not cause damage, it was lined with PPS plastic flexible liners connected to each boiler. Installing this type of material was possible due to the low flue-gas temperatures of the extremely efficient Ultramax PB condensing boiler.
The installation is controlled by a matched MHS RVA 47 cascade unit that also provided direct on-boiler weather compensation and time control.
The client was Medway Council.
