Passiv UK, founded in 2008 and headquartered in Newbury, Berkshire, is a smart energy technology company dedicated to decarbonising homes through innovative solutions. Its flagship product, the Passiv Smart Thermostat, is specifically designed for heat pumps, optimising performance to reduce heating bills by up to 30% and enhancing efficiency by 17%, as verified by the Energy Saving Trust. In 2023, Passiv introduced Greener Grid Payments, the UK's first automated Demand Side Response service for home heating, offering homeowners up to £100 annually for efficient energy use. Passiv UK is a BUUK Infrastructure company.