Cut energy, carbon and pollutants from every indoor space.

Rensair transforms existing HVAC systems into intelligent air quality ecosystems – combining connected air purification, real-time sensing and smart ventilation control to reduce energy use while improving indoor air quality.

Built for complex indoor environments

Trusted to make indoor spaces cleaner, healthier and more energy efficient.

Proven across commercial buildings, education, healthcare and transport – helping organisations reduce energy use, lower emissions and protect the people inside.

The hidden cost of clean air

Traditional ventilation is expensive, energy-intensive and no longer enough.

Most buildings rely on mechanical ventilation systems that run on fixed schedules, regardless of real-time occupancy or air quality. That means energy is often wasted conditioning outside air when spaces are empty, lightly used or already within safe air quality thresholds.

At the same time, organisations are under pressure to improve indoor air quality, reduce operational costs and meet carbon reduction targets. The challenge is clear: buildings need cleaner air – but not at the cost of higher energy use.

Mechanical ventilation can consume significant energy by heating, cooling and circulating outside air even when demand is low.

Real estate owners and operators need practical ways to cut building emissions without major disruption.

Poor IAQ affects comfort, health, confidence and productivity in shared indoor spaces.

Replacing HVAC infrastructure is expensive, disruptive and often carries its own carbon cost.

Bringing clean air to:

Indoor Air Quality

Cleaner air starts with controlling what you can’t see.

Indoor air is shaped by a complex mix of invisible pollutants – from fine particles and allergens to biological contaminants, odours and vehicle emissions. Traditional ventilation plays an important role, but it is not always enough to maintain cleaner, healthier indoor environments efficiently.

Rensair combines HEPA filtration, VOC filtration and UVC technology to help remove up to 99.97% of airborne pollutants, improving the air people breathe across offices, universities, healthcare settings and transport environments.

Pollutants Rensair helps remove:

01

Pathogens & Microorganisms

RNA and DNA viruses, bacterial spores, mold spores and staphylococcus.

02

Allergens

Pollen, dust mite allergens, pet dander and household dust.

03

Odours & VOCs

Odours, tobacco smoke, cleaning product residues and formaldehyde.

04

Fine Particles & Emissions

Vehicle particulates, diesel and petrol emissions, fine dust and combustion particles.

The Rensair approach

A smarter way to ventilate, purify and decarbonise buildings.

Rensair upgrades existing buildings with a connected air quality ecosystem. Instead of replacing HVAC infrastructure, Rensair combines standalone air purification devices, advanced sensing and Rensair Cloud to optimise the balance between mechanical ventilation and in-room air purification.

The result is a more efficient ventilation strategy: cleaner indoor air, lower energy consumption and a practical path to reducing carbon emissions across your building portfolio.

From assessment to optimisation

A complete retrofit pathway for cleaner, lower-carbon buildings.

STEP 01

Assess

We analyse your building layout, occupancy patterns, existing HVAC performance and indoor air quality requirements.

STEP 02

Model

Our team identifies where connected purification devices can deliver the greatest impact and models the potential energy, cost and carbon savings.

STEP 03

Deploy

Rensair devices are installed throughout occupied spaces and connected to Rensair Cloud for real-time visibility and control.

STEP 04

Optimise

Your air quality ecosystem continuously monitors conditions, supports smarter ventilation decisions and helps maintain healthy, efficient indoor environments.

Retrofit your building. Reduce your footprint.

Why Rensair

Energy savings and healthier air - without compromise.

Reduce HVAC Energy Use

Optimise ventilation demand by combining mechanical airflow with energy-efficient air purification.

Improve Indoor Air Quality

Remove airborne pollutants, particles and pathogens with certified filtration and purification technology.

Lower Carbon Emissions

Reduce the energy burden of traditional ventilation and support your organisation’s sustainability targets.

Extend Existing Assets

Upgrade the performance of current buildings without disruptive HVAC replacement.

Gain Real-Time Visibility

Monitor IAQ, device health, trends and alerts through Rensair Cloud.

Protect Occupants

Create cleaner, more comfortable indoor environments for employees, students, patients, passengers and visitors.

Rensair Cloud

Turn indoor air quality into actionable building intelligence.

Rensair Cloud connects your air purification devices, sensors and building systems into one intelligent platform. Facility and building managers can monitor indoor air quality, manage device performance, review trends and make data-led decisions about ventilation and energy use.

From individual rooms to entire portfolios, Rensair Cloud gives you the visibility and control needed to manage cleaner, more efficient indoor environments.

Real-Time IAQ Monitoring

Track key indoor air quality parameters including particulate matter, CO₂, TVOC, temperature and humidity.

Asset Management

Group, monitor and control multiple devices across locations, floors or building portfolios.

Digital Twin View

Access device-level readings, settings and performance data for precise control and troubleshooting.

Streaming Analytics

Analyse historical trends, compare performance and export data for reporting.

Scheduling & Automation

Configure recurring behaviours, maintenance reminders and operating schedules.

Alerts & Preventive Rules

Detect anomalies early and act before air quality or system performance is compromised.

Connected hardware. Intelligent software.

An air quality ecosystem for every indoor space.

Core 600i

Our award-winning portable hospital-grade air purifier for improving IAQ in a wide range of indoor spaces.

Core 560

Our award-winning portable hospital-grade air purifier.

Compact 460i

Our award-winning technology made more lightweight and portable, for use in smaller indoor spaces.

AirBubbl 38i

Our award-winning technology reimagined for transportation and use in vehicles.

Measured impact

Real buildings. Real savings. Real air quality improvements.

Rensair works with organisations across sectors to reduce energy use, lower carbon emissions and improve indoor air quality – without replacing existing HVAC infrastructure.

Offices

384 tonnes CO₂e reduction for a Fortune 500 insurance company

See how Rensair helped a major office environment reduce its carbon footprint while improving indoor air quality across occupied spaces.

University

Helping a leading green university reduce its carbon footprint

Rensair’s SDCV approach supports cleaner air and lower energy use across demanding education environments.

Ambulance / Transport

Cleaner air for drivers and passengers on the move

Rensair AirBubbl helps ambulance services protect staff and passengers from polluted air inside vehicles.

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.