Meet the people behind the technology

Founded in 2008, Passiv is a British company with innovation at its heart. Our mission is to create smarter technology to decarbonise homes.

A history of Passiv

Passiv is a smart energy technology business. We have spent over a decade developing software solutions to decarbonise homes. Our patented technology provides market leading control of low-carbon technologies with a particular focus on heating.

Based in Newbury and with a team of around 50 people, we are a pioneering company at the forefront of reducing energy bills and carbon emissions for millions of households.

In April 2021, Passiv was acquired by BUUK Infrastructure. BUUK Infrastructure is the leading provider of multi-utility networks in the UK, operating more than 2.5 million utility connections. BUUK Infrastructure is backed by Brookfield Asset Management who manage $625bn of energy and building assets globally.

Our company timeline



Company founded as PassivSystems

PassivSystems was founded to develop smart home technology for homes and businesses around the world.
Passive Systems Logo


PassivSystems’ thermostat wins ‘Top 6 hottest products’ award at CES

PassivSystems launches the world’s first smart thermostat allowing consumers to remotely control their heating and hot water.
CES Logo


PassivPro solar monitoring service launched

PassivPro provides comprehensive monitoring services for solar portfolio owners.
Passiv Pro logo


First 1,000 thermostats installed

PassivSystems’ thermostats are installed in homes and businesses across the country.
app on phone being used outdoors


First heat pump controls installed

The PassivSystems thermostat is developed to support heat pumps - the first ‘heat pump smart thermostat’.
Using PassivPro app


Became an energy supplier to offer Feed-in Tariff services to solar customers

PassivSystems expands its offering to its solar customers by offering Feed-in Tariff administration under its wholly-owned subsidiary logo


FREEDOM project begins with hybrid heat pump installations

The PassivSystems thermostat is installed alongside some of the first hybrid heat pumps in the UK.
Engineer installing a heat pump


First Heat Interface Unit controls installed on the Cranbrook district heat network

The PassivSystems thermostat is developed to support Heat Interface Units on heat networks.
E-on building from the road in 2016


First Demand Side Response services delivered with Hitachi heat pumps

PassivSystems trials some of the first domestic Demand Side Response services for low-carbon heating.
Heat pump outside


First hybrid heat pump deployments with EDF and Shell Energy

PassivSystems partners with EDF and Shell Energy (under the ‘B-Snug’ brand) to offer low-cost hybrid heat pumps funded under the Government’s Renewable Heat Incentive scheme.
EDF and Shell Energy Logos


Acquired by BUUK Infrastructure

PassivSystems is acquired by BUUK Infrastructure and rebrands as Passiv UK.
BUUK Infrastructure Logo


Launched Go-REGO service to solar customers

Passiv expands its offering to its solar customers by becoming the first company to register small, domestic renewable installations for green energy certificates.
Green Energy Certificates


Passiv Smart Thermostat launched

The revolutionary Passiv Smart Thermostat for heat pumps is launched at InstallerSHOW.
Passiv Smart Thermostat, Programmer and App

Join the Passiv team

Want to join a team of talented and hard-working individuals at an exciting stage of our growth?

Passiv employs people in a range of disciplines from Engineering to Sales and Product Management to Customer Support. Have a look at our current vacancies on the BUUK Careers website.