Bespoke turnkey heating solution ensures rapid, high quality installation at historic boarding school.
Queen Victoria School (QVS) in Dunblane has refurbished its ageing heating system with the installation of four new Remeha Gas 220 Ace boilers using a Remeha offsite fabricated cascade arrangement.
QVS has been looking after the children of UK Armed Forces personnel since 1908. The School prides itself on providing service children with a top-class education, coupled with the highest standard of care, and offers outstanding facilities within its Baronial Scottish-style buildings.
Over the years, the School’s heating system had been modified many times to improve its reliability and efficiency, but a complete replacement was now needed.
The age and nature of the building fabric presented a number of challenges, as Euan Findlay, Principal Engineer at engineering consultancy Cundall, explained.
“The first concern was that asbestos had been identified within the plant room on all the walls and existing pipework” he said. “This can be a problem in older UK buildings like QVS, and the School acted swiftly to manage it. However, removing it required extensive preparatory work before work could start on the replacement – all of which had time and financial implications.”
The need to maintain round-the-clock heating and hot water services for the staff and students during the works was a further consideration.
“As the project was scheduled to be carried out during term time, temporary boiler plant had to be used to keep the heat on,” Euan continued.
Euan specified installing four Remeha Gas 220 Ace 250 floor standing boilers with an offsite fabricated cascade arrangement, including plate heat exchanger, to meet all the requirements in the main school building and Wavel Teaching Block.
“The nature of the building meant that floor-standing boilers were required to meet the high heat demand,” he explained. “We selected the Gas 220 Ace boilers for their high efficiencies and reliability and also for the Remeha offsite cascade options. All the ancillary equipment comes prefabricated and the controls are more straightforward, making specification much easier and giving greater assurance of the end result.”
Working with Cundall, Remeha prepared 3D drawings of a boiler cascade arrangement designed bespoke to the specified layout and integrated specially sized pump sets and a Plate Heat Exchanger (PHE) into the design.
These detailed drawings provided Cundall and the School with early visualisation of the layout. Once the design was clearly identified, production took place in a factory environment, with comprehensive end-of-line testing.
Remeha’s turnkey heating solutions can be supplied as a single unit. However, at QVS the requirement was to supply the equipment in kit form for assembly on site by the project contractor FES Group.
Gary Bickerton, Project Manager at FES Group, was impressed with the ease of installation of the bespoke offsite solution and the time savings it delivered.
“The units arrived in clearly numbered pallets with a reference drawing for guidance,” he said. “Unloading the pallets and bolting the components together was straightforward and took no time at all for the operatives on site to complete.
“Having the pipework prefabricated definitely saved us a significant amount of time on site and meant that our operatives could concentrate on the secondary pipework installation,” he concluded.
The Gas 220 Ace is particularly suitable for use in a cascade system due to its small footprint and width of only 90cm which allows for an exceptionally compact cascade configuration.
“The installation is spot on!” Gary added.
Now commissioned and fully operational, the School can look forward to significant energy and emissions savings from the more energy efficient new Remeha boilers in the months ahead.
The fully modulating Gas 220 Ace series is available in 160, 200, 250 and 300 kW outputs and delivers higher-than-average gross efficiencies of up to 98% with low NOx emissions. It is supplied with onboard time and temperature controls, with direct connection to a Building Management System provided as standard to maximise heating efficiency.