FEATURE BOILERS, PUMPS & VALVES OFFSITE HEATING SOLUTION TICKS ALL BOXES


Queen Elizabeth’s Hospital (QEH) School in Bristol has installed five Remeha Gas 220 Ace floor-standing condensing boilers on an off-site fabricated cascade system


A


s one of the country’s leading independent schools, QEH is also one


of its oldest, having existed since 1590. Its current home is a Grade II-listed building in Clifton that dates back to 1847. When the two ancient cast-iron sectional boilers serving the main building came to the end of their serviceable life, QEH was keen to replace the dated boiler plant during the summer shutdown period. Consultant Geoff Beaven specified


installing five Remeha Gas 220 Ace boilers with a Plate Heat Exchanger (PHE) on an off-site fabricated cascade system to meet the heat output demand in an exceptionally compact footprint. “The nature of the listed school


building meant that floor-standing boilers were required to meet the high 1,250kW heat demand,” explains Beaven. “But we were also working to a tight schedule, as the whole project needed to be completed within the fixed summer holiday period. We selected the


Gas 220 Ace boilers for their high efficiencies and reliability, and also for the Remeha off-site fabricated cascade options that would enable a faster, smoother installation.” Working with Beaven and project contractor, Hewer FM, Remeha prepared 3D drawings of the boiler cascade arrangement to the specified layout and integrated a PHE into the design. The drawings provided all stakeholders


with early visualisation of the layout. Only once the design is clearly identified does production take place in a factory environment, with end-of-line testing providing added quality assurance. Once the equipment was delivered to site, Hewer FM bolted together the boilers and connected them to the existing system. Installing multiple advanced condensing boilers in a cascade arrangement is a highly effective means of meeting a building’s heat demand – resulting in greater efficiency, improved


reliability and more straightforward future maintenance. At QEH, the new Remeha boilers


have been serving the whole of the main building, as well as eight science labs, additional classroom blocks and the music and art buildings since the autumn. In that time, not only have comfort levels risen within the five floors of the school building, but initial data is already pointing to significant gas savings due to the higher efficiencies of the fully modulating plant. Available in a wide range of outputs,


the Gas 220 Ace series is said to deliver higher-than-average gross efficiencies of up to 98 per cent with ultra-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.


Remeha remeha.co.uk


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