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www.heatingandventilating.net


Breathing new life into historic building


The Grade II listed India Buildings in the heart of Liverpool has undergone a major refurbishment, to transform the 100 years old, 12-storey mixed use structure into state-of-the-art offi ce, residential and retail accommodation


B


eing redeveloped for owner Legal & General by refurbishment specialist Overbury, the rejuvenation sees the eight fl oors of Category


A offi ce space delivering a BREEAM and WELL- compliant environment, through grilles and diff users from air movement specialist Gilberts (Blackpool). The 350,000ft2


of commercial space is served by


four-pipe heating and cooling services connected to fan coil units behind bespoke bulkheads. Consulting engineers Crookes Walker Consulting designed the ventilation strategy, installed by Ameon Building Services Engineering. Crookes Walker specifi ed a combination of JSL and L Series linear bar grilles in the bulkheads, GECA egg crate grilles and GTD concealed swirl diff users across the fi eld area of the perforated ceilings to handle supply and extract of fresh air in the open plan


commercial areas. GX air valves ventilate the WCs. A technical team executed Computation Fluid Dynamics (CFD) modelling of Crookes Walker’s design to validate optimal incoming air temperatures to achieve comfort conditions, without over-heating: a comfortable average 22°C was preserved. In the Category A offi ce space- already let to


HMRC Gilberts’ L Series of linear bar grilles provide heated air supply, with a typical 57% free ventilation area; blades can be set at a choice of 0°, 15° or 40° defl ection. ‘Fineline’ bars enable blending into the bulkheads throughout the offi ce space. GECA egg crate grilles handle extract of the used air. In the offi ce and meeting room ceilings, patented


GTD omni-directional concealed swirl diff users feature a frameless chassis, which means they become an invisible, integral component of the ceiling


grid; the radial vanes provide rapid entrainment and intermixing of high volumes of air through up to 50% free ventilation area ceiling tiles to avoid draughts or cold spots for the occupants below. The ground fl oor area features JSL jumbo slot linear diff users. The air supply diff user provides a shadow-gap appearance with high airfl ow (between 20-250l//s per metre), with an unbroken visual appearance unique in the marketplace. Runs up to 6m long sit alongside GECA egg crate grilles to provide extract through the suspended ceiling. Lee Carey, principal mechanical engineer at Crookes


Walker Consulting said: “We recommended Gilberts’ grilles and diff users because we were confi dent in the quality of the product, and knew we could rely on a rapid response to any technical or practical queries which was crucial in such a high profi le project.”


Listed Buildings


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FOC Commissioning 5 year Warranty


Stainless Steel HEX  


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W www.vokera.co.uk/commercial E commercial@vokera.co.uk


June 2022 15


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