Heat, Space and Light Ltd is a rapidly growing company specialising in the design, supply, and commissioning of residential ventilation systems for Passivhaus and highly energy-efficient buildings.

We help our clients to design and install Mechanical Ventilation with Heat Recovery (MVHR) solutions to improve indoor air quality, comfort, and energy efficiency in their residential new build and renovation projects.

We also offer airtightness testing services, for both Passivhaus and non-Passivhaus residential and commercial buildings. This includes forensic airtightness pressure testing before or mid-construction to discover air leakage points in the building fabric and suggest remedial actions to help the project achieve actual or near-Passivhaus levels of airtightness. 

Our projects and consultancy engagements have been featured on the BBC, Sky News, and Grand Designs, and we operate right across the UK.