Commercial heating
www.heatingandventilating.net
Sustainable garden centre combines heat pumps with passive heat recovery and solar PV
BREng, the low carbon building services specialist, has completed a high efficiency HVAC system based on heat pumps, natural ventilation and solar PV for a new state-of-the-art sustainable garden centre in Tingley, near Leeds.
W
ith passive heat recovery, rainwater harvesting and LED lighting, the centre is designed to be as self-sufficient as
possible in power and water. The original plan for Tingley Garden Centre
was to install a full natural ventilation solution augmented with heat pumps. However, calculations showed this would be unable to cope with high summer loads and present problems in winter, when significant additional heating would be needed to warm incoming cold air. The final design, produced by BREng for installer
EBA Climate Limited, is a fresh air ventilation solution with incoming/outgoing air passed through a high-efficiency Daikin passive heat recovery system, supported by Daikin VRV heat pumps. This provides a high quality environment for customers and staff, supported by efficient heating and cooling when required.
The centre’s rainwater harvesting system
provides grey water for watering plants, flushing toilets, and hosing down paved areas. BREng’s Rob Smelt said: “The only power input
required for the ventilation system is the fans, and these are fed by electricity from the roof-mounted PV system, which produces most power when the
Daikin heat pump-based VRF outdoor units alongside the centre.
Left: Plant room with hot water systems and associated pipework.
sun shines, when ventilation requirements are highest.”
The site is served by two heat pump systems, one heating the retail area and providing heating and cooling to the cafe, restaurant and children’s play area, and the other providing hot water for washrooms and kitchens via connected VRV hot water modules.
A Daikin heat pump-based VRV and heat recovery
system was chosen due to the manufacturer’s iNTELLIGENT Touch Manager control system, which enables multi-zone control and operates like a mini Building Management System, allowing integration
Above: Ducted units and ceiling suspended four-way terminal units above the sales floor.
14 November 2024
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