ABOUT US

At Rensair, we live and breathe clean air.

“Just as people expect pure water from the tap, or hygienic food from the supermarket, so too they expect clean air in buildings and shared spaces. It’s not just an expectation, it’s a human right.”
— Christian Hendriksen Co-founder & CEO

Over a decade of expertise in infection control and clean air solutions.

D4M Disinfection for Medicine is a Polish company specialising in solutions that improve infection prevention, indoor air quality, and epidemiological safety within healthcare environments.

For more than 10 years, we have worked closely with hospitals, outpatient clinics, and other medical institutions, providing advanced technologies that support the safety of both patients and healthcare professionals. Our expertise covers disinfection, sterilisation, infection control, and the implementation of innovative solutions designed for environments where the highest hygiene standards are essential.

We believe that clean air is one of the key elements of modern infection prevention strategies. That is why we offer proven air purification technologies used in hospitals, healthcare facilities, schools, offices, and other environments where the health and safety of occupants are of particular importance.

Our mission is to deliver solutions based on expertise, practical experience, and proven effectiveness—solutions that genuinely improve indoor environmental quality and help reduce the risk of airborne pathogen transmission.

why it’s worth trusting us?

Trusted Expertise in Healthcare Safety.

Clean air, for generations.

For over two decades, we’ve been transforming commercial air filtration and leading the drive for better indoor air quality.

Our technology was developed by Henrik Hendriksen, a Danish ventilation engineer who created the world’s most lab-certified solution for reducing airborne pathogens, pollen and pollution in non-residential buildings.

Today, we’ve reimagined Henrik’s technology for the connected world and created Rensair – the world’s first air quality ecosystem, and a step-change in how we make indoor spaces healthier for everyone.

From clean air to carbon-cutting

We were proud to play our part during the Covid-19 pandemic by helping healthcare environments improve their indoor air quality and create Covid-secure environments. The NHS quickly became our largest customer.

And along this journey we saw that our air quality ecosystem could also be used to decarbonise indoor spaces and help organisations lower their energy use and emissions.

40% of a building’s energy consumption comes from mechanical HVAC ventilation systems. By optimising these systems based on real-time occupancy and environmental data, we’re able to help our clients significantly reduce energy consumption – saving them money, reducing emissions and helping them meet their sustainability and Net Zero goals.

A better way to decarbonise.

This discovery has inspired us to build the next generation of ventilation solutions for any indoor environment that uses mechanical ventilation.

We call it HVAC: Hacked.

Because by hacking antiquated HVAC technology and ventilation systems with our powerful air quality ecosystem, we make clean air and carbon-cutting go hand-in-hand.

Crucially, we avoid the need to ‘rip and replace’ existing ventilation systems, which is costly, disruptive and carries its own hefty carbon cost.

It’s a more sustainable and cost-effective approach to ventilation that will deliver a step-change in how buildings and indoor spaces are ventilated for decades to come.

Hacking HVAC systems all over the world.

Our mission is to provide clean air and lower energy consumption for every indoor space: from offices and co-working spaces to hospitals and dental practices, schools and lecture halls to hospitality venues, hotels, restaurants and retail outlets.

We’re the most certified air quality proposition in the industry, with two decades of leadership in commercial air filtration. Our award-winning air quality ecosystem is trusted by businesses, education, transportation and healthcare providers in more than 40 countries over five continents.

With operations in the UK, Europe, the USA and Asia, we’re bringing our next generation ventilation technology to the world and enabling both public and private organisations to cut carbon, costs and pollutants from their indoor environments.

OUR GLOBAL FOOTPRINT.

Ready to hack your HVAC?

Let’s build your air quality ecosystem.

Upgrade your existing building with an intelligent air quality ecosystem designed to reduce energy use, cut carbon and create healthier indoor spaces.