We received a call from a M&E client who was utilising a temporary boiler onsite to support the final commissioning stage of a high rise apartment development containing around 80 heat interface units they had installed. The client explained that the existing hire company had provided a temporary boiler which was constantly breaking down causing significant disruption and delays to the project, as well as the installation presenting a health & safety risk to the workers onsite. 

Our client understandably decided to take action and engage with Rapid Energy, the market leaders, to resolve the various issues and replace the equipment with a more reliable piece of equipment and crucially hoses of suitable specification for the high pressures associated with a high rise development.

Rapid Energy’s team arrived on site to conduct a scope of work to determine the appropriate hire solution.

650kW Packaged Boiler

Temporary Boiler and Equipment Used

  • 1 x 600kW Packaged Boiler
  • 1 x 4500 litre Oil tank 
  • 60m of DN100 PN16 20 bar rated high pressure stainless steel braided hoses
  • 1 x 25m three phase 32 amp lead
  • 1 x 10 bar rated 1MW plate heat exchanger
  • 1 x 800L high pressure expansion vessel 
  • 10m of DN45 10bar rated high pressure stainless steel braided hose 
  • 1 x additional 2” safety valve for clients side of the PHX


At Rapid Energy we place a huge emphasis on technical training of our engineers to be able to understand a customer’s requirements and to specify a technical solution which will meet their performance needs. But most importantly, we present a solution that meets both health and safety standards and is compliant to current regulations. Details such as the height of the building, working system pressures and access for delivery should be noted.

Factors such as these can mean the difference between a temporary boiler solution that is installed with little to no disruption, and one that causes a catalogue of ongoing breakdowns and failures. This of course may result in project delays and major health and safety concerns.

Previous issues around inadequate hose connections causing failures onsite were highlighted by the client. Following completion of our site survey and fully understanding their system requirements, we subsequently presented a suitable temporary solution. We proposed and supplied high pressure stainless steel 20 bar braided hoses joined with PN16 flange connections eradicating any previously highlighted points of failure. 

Manufacturers test certificates were also provided to the client for the braided hoses. This provided evidence and peace of mind that our equipment met the high working pressures of the client’s system.

Installation and location


Once a detailed survey and RAMS were  presented, the client was confident and happy for Rapid Energy to proceed. Upon instruction from the client, equipment was ring-fenced and loaded onto the HIAB. Once our engineers arrived onsite, they proceeded to isolate the existing system utilising the isolation valves on the primary circuit and safely disconnecting/removing the existing equipment.

Once the equipment had been removed, our 2 man team proceeded to install 60 metres of specialist high pressure steel braided hose at high level utilising a scissor lift onsite. Both sets of flow and returns were connected to the plate heat exchanger and temporary 600kW boiler. Our engineers then provided a 25m three phase lead, connecting the power from a connection point onsite to the temporary boiler. We then began the commissioning process by filling and pressurising the temporary boiler to a 2 bar pressure set point on the primary side of the plate heat exchanger. Once completed, the engineers commissioned the boiler which included a call to Rapid Energy’s HQ to confirm visuals on the BMS. 

From the moment we were instructed, we delivered, installed and commissioned a temporary 600kW heating solution which was both safe and reliable for our customer, allowing their project to get back on track.

We would like to thank our client Ampsail for their faith in our engineering expertise and proposed temporary boiler solution. And we are delighted that they we were rewarded with an installation that provided a faultless service throughout the 5 month life of the project and that Rapid Energy were able to eradicate the problems that had previously been experienced onsite. 

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