Project Background

We were approached by a Mechanical and Electrical Systems contractor that was tendering for a boiler replacement and adaptation at a secondary school in Wiltshire. This was due to a new Sports Centre being created for the School during the initial phase of the project.

The project consisted of the replacement and adaptation of the existing central boiler plant, which served part of the Sports Centre on the Grounds.

The Sports Centre was constructed in 2001 and later extended in 2018. The existing central plant was located over three levels, with gas-fired boilers and integral storage calorifiers meeting the space heating and hot water demands of Phase 1 of the building. The primary heat load on the boiler plant was the swimming pool which was served via a plate heat exchanger, and the pool air handling unit with integral heater battery.

The existing boiler plant and calorifiers needed to be stripped out and replaced with new frame mounted boilers in a cascade configuration, with secondary heating circuits to serve the existing building loads, and 2 no. new domestic hot water calorifiers.


Prior to tendering for the project, one of our engineers carried out a full site survey to fully scope the temporary heating and hot water solution required for the project.

650kW Packaged Boiler

Temporary Boiler and Equipment Required

1 x 600kW Packaged Boiler

1 x 250kW Packaged Heat Exchanger

1 x Three Phase | 32a Commando | 5 Pin Red | 25m Lead

1 x 3″ Camlock 16 Bar Rated Hose | 5m Length |

1 x 2” FDA Approved Hot Water Hose | 10m

1 x Bunded Fuel Tank 4500

Existing Setup and Challenges

The works were being undertaken during live operation of the sports centre, with shut-down of services for agreed periods only. A temporary boiler plant had to be provided to meet the heating and hot water loads of the project for the duration of the contract.

Installation and location

Our Temporary Heating and Hot Water Solution

We supplied a 600kW temporary boiler plant room with an integrated HWS heat exchanger to provide both LTHW and HWS into the primary and secondary heating circuits. The heating flow and returns were connected to the swimming pool heat exchangers, which provided temporary heat for the swimming pool.

As part of the replacement programme, the contractor was required to remove and upgrade the hot water calorifiers. In order to keep the showers in operation, Rapid Energy provided a 250kW HWS heat exchanger, which connected directly into the secondary circuit providing instantaneous domestic hot water.  

This was complete with a two way, remote monitoring system that included sensors and alarms to monitor the assets core vitals and performance.

Following the commissioning of the temporary boiler, the engineers then checked with HQ that the temperatures matched the readings that were visible on the BMS.

The school and our M&E client were really impressed with how the temporary boiler system operated.

Customer Quote

Jamie and Rapid Energy have been nothing short of brilliant, and a pleasure to work with. This is our first project together, and we will be definitely using them again, on account of their flexibility. One key point was their remote monitoring, which meant when the system went down, we were told before the client even knew!

Andy Wright
Envira-Mech Services Ltd

Get in touch

  • Drop files here or
    Max. file size: 50 MB.
    • This field is for validation purposes and should be left unchanged.
    • ISO 9001 Logo
    • OFTEC Accredited Logo
    • CHAS Accredited Logo
    • Constructionline Gold Logo
    • GAS Safe Logo
    • SSIP Logo
    • F-Gass Certified
    • SafeContractor Logo