Briza Net Zero to heat and cool the first delivery of homes at Hampshire’s new sustainable garden village
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Jaga UK’s state-of-the-art Briza Net Zero heat pump radiator has been selected to heat and cool some of the first new homes at Welborne, a new generation sustainable garden village near Fareham, Hampshire.
Designed by Buckland Group, Welborne, one of the largest new community projects in the UK, is under construction and will become a place for 15,000 people to live, work and play, consisting of connected and energy efficient homes integrated with extensive publicly accessible green space. This latest announcement reinforces Welborne’s commitment to embedding sustainable solutions throughout the development.
Jaga’s Briza S Net Zero model was chosen for its slimline, elegant design and exceptional energy performance. The compact yet powerful unit provides efficient heating and cooling via Welborne’s ambient water-source heat network – the largest of its kind in the UK.
Developed by Last Mile Heat in collaboration with Rendesco, the sustainable energy network supplies low-carbon heating, cooling, and hot water, helping to significantly reduce the community’s carbon footprint and deliver long-term energy savings for residents.
At the heart of the network is Portsmouth Water’s underground Hoads Hill Reservoir, which provides water at a stable temperature of approximately 10–12ºC. This water is pumped into each home’s heat pump system, where it is warmed to 45ºC before circulating through Jaga’s Briza Net Zero emitters. During the summer, the same system delivers cooling by channelling cooler water through the Briza Net Zero units, providing an efficient, climate-friendly alternative to air conditioning.
The initial phase of the project will supply heating and cooling to 700 new homes, along with commercial premises and community buildings, gradually expanding to serve all planned 6,000 homes and 15,000 residents. Notably, this sustainable energy network is projected to cut CO₂ emissions by 90% compared to gas boilers, saving over 272,000 tonnes of carbon in the first 25 years of operation and providing residents with ongoing energy savings. Recently, the Green Heat Network Fund awarded £2 million to support the network’s development, further reinforcing its positive impact on the environment and local community.
Phil Mangnall, Managing Director of Jaga UK, commented, “We’re incredibly proud to be part of this forward-thinking development that prioritises sustainability and energy efficiency. Our Briza Net Zero emitters are specifically designed to work seamlessly with renewable energy systems, delivering high heat output at lower flow temperatures. This means less energy is needed to heat the water from the reservoir, creating a highly efficient system. Their slimline, sleek design also complements the timeless architecture of the homes, adding both style and functionality. It’s exciting to see these emitters play a key role in the UK’s largest water-source heating and cooling network.”
In delivering this ambitious project, Jaga UK is collaborating with Welborne’s housebuilder partners, including Thakeham, Pye Homes and CG Fry. These developers are creating sustainable and high-quality homes to meet the needs of future generations. Jaga is also working closely with the developers’ chosen heat pump partners, NIBE and others, to provide a cohesive heating and cooling system for each development.
Welborne Garden Village is an ongoing development, and prospective residents will benefit from new schools, healthcare, sports and leisure facilities, along with a range of retailers, and a science and technology park. Taking a nature-led design approach, more than 50% of Welborne will be accessible green space woven throughout, and the garden village will be biodiversity positive with wildlife and natural habitats restored from previously intensively farmed agricultural land.
Construction on the first phase began in 2024, and Welborne will welcome its first residents early this year.
