Air purification for dental practices

Rensair is an established supplier of air purifiers for dental surgeries, with a clean air delivery rate that can reduce fallow time by half and maximise patient throughput.

Our patented air purifier design, which combines H13 HEPA filtration with germicidal UVC technology, was developed to meet the strict standards of Scandinavian hospitals. It destroys a minimum of 99.97% of airborne viruses and bacteria, including coronavirus at 99.99% efficacy.

Air purification for dental practices

Minimise fallow time, maximise patient throughput

It’s a fact: poor ventilation extends fallow time. 

Depending on your practice’s Air Change per Hour rate, post Aerosol Generating Procedure (AGP) downtime can be as much as 30 minutes. That severely limits the number of patients you can see per day.  

In a standard 30m3 dentist surgery room (4x3m with normal ceiling height), Rensair’s portable air purifier can change the air 18 times per hour (18 ACH), eliminating air pollutants and halving fallow time.

Trusted by the NHS and private dental surgeries across the UK, our innovative design combines a HEPA filter with germicidal UVC light to trap and inactivate a minimum of 99.97% of airborne particles. 

Instant. Portable. Affordable. Proven. The practical air purification solution for delivering clean air and maximising patient throughput.

Air purification for dental practices

Health authority guidance for disease control

The pandemic has had a significant impact on patient throughput at dental surgeries. While lockdowns have been lifted, fallow time – the amount of time an operatory is left empty after an Aerosol Generating Procedure (AGP) to permit the clearance and/or setting of airborne droplets or aerosols – is still contributing to long waiting lists.

The UK government’s January 17 2022 ‘COVID-19: infection prevention and control dental appendix’ to its broader guidance on ‘Infection prevention and control for seasonal respiratory infections in health and care settings (including SARS-CoV-2) for winter 2021 to 2022’ provides an update on post AGP downtime for dental surgeries.

Where there are 10 or more Air Changes Per Hour (ACH), a baseline post AGP downtime of 15 minutes is recommended. However, that downtime increases to 20 minutes where there are 6 to 9 ACH and to 30 minutes where there are 1 to 5 ACH or where the ventilation rate is unknown.

Rensair traps and destroys more than 99.97% of airborne particles

RNA & DNA Viruses

throughout nature

Bacterial Spores

poiled foods, kitchens, bathrooms


windows, doors, carpets

Mold Spores

moist places, bathrooms, inside pillows, humidifier


Ceiling tiles, incubators, faulty HVAC


diesel and petrol emissions

Dust Mite Allergens

furniture, carpets

Pet Dander

pets, floors, carpets


skin, mucous membranes, soil


burnt food, garbage, tobacco, cleaning products

Tobacco smoke

cigarettes, formaldehyde


skin, hair, soil, plastic, clothing

Air purification for dental practices

Halving fallow time brings a clear ROI on air purification

In a standard 30m³ dentist surgery room (4x3m with normal ceiling height), an air purifier capable of cleaning 560m³ per hour would deliver 18 air changes an hour (18 ACH). That means a dentist can operate with the minimum 15 minute fallow time, substantially increasing patient throughput.

Assuming that a single surgery room is utilised for 8 hours a day, with 30 minutes allocated to each appointment, then a 30-minute fallow period would allow 8 appointments per day. Drop the downtime to 15 minutes and the number of patients seen per day increases to 11 appointments. Over a period of one working week, that equates to 15 more patients, or 750+ over a year. 

The cost and patient benefit strongly favours air purification, with a quick return on investment on a hospital-grade air purifier that can reduce the required fallow period by half.

“We had to allow a full hour for the air to settle before we could reenter the room to disinfect. Rensair saves us a lot of time. We can now have a room ready in 15 minutes.”
— Erik Lof Owner & CEO
“The actual air exchange of 560 m3 per hour was especially important as it allows up to 12 air exchanges an hour in my surgery. I also appreciated that clean air leaves the Rensair at 360 degrees.”
— Dr. Sue Taylor Owner

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Case studies and articles

Read more >

Rensair air purifier test achieves post AGP clearance in 1.3 minutes

In-situ modelling tests conducted by ESI Group in a hospital dental treatment room have demonstrated that Rensair’s portable, hospital-grade air purifier can achieve clearance in just 1.3 minutes, delivering an air change rate of 12.6 Air Changes per Hour (ACH) when … more

ESI Group validates the proficiency of Rensair’s clean air delivery

Airflow is critical to the effective performance of portable air purifiers and an (often hidden) point of difference between competing brands. Successfully cleaning all the air within a room is a real engineering challenge. Many air purifier vendors make unsubstantiated … more

Orchard Cottage Dental Surgery Reassures Patients with Rensair

Dr. Sue Taylor, owner of Orchard Cottage Dental Surgery in Fetcham, Leatherhead, says air purification was always a consideration at her surgery. “We have always had excellent ventilation and the practice building is large. When the coronavirus pandemic occurred, just … more

Air purification for dental practices

Choosing the right air purifier for dentists

Once the need and ROI has been established, the question of what type of air purifier remains. The Faculty of General Dental Practice (FDGP) UK and College of General Dentistry (CGDent) published an updated guide in October 2020:  Implications of COVID-19 for the safe management of general dental practices.  The guide recommends air purifiers using HEPA filters or UV irradiation to improve the quality of air within the surgery by removing or diluting contaminated aerosol and thus reducing the risk of infection.

In addition, the guide recommends that the unit should be positioned close to the source of the aerosol production (i.e. head or foot of the dental chair).  The air flow rate, efficiency of air cleaning and room volume should all be considered, along with maintenance and safety. Safety is a major concern also voiced by the UK SAGE committee, which warns against unproven technologies that rely on chemical reactions and may give rise to harmful toxicological by-products. Pre-filters are also a vital feature, trapping dust and any other large particles before reaching the HEPA filter to ensure an extensive and efficient filter life. Air purifiers without a pre filter will not operate effectively for long.

Air purification for dental practices

Hospital Dental Treatment Room tests

Rensair’s patented air purification system combines a hospital-grade H13 HEPA filter with an ozone-free UVC light to trap and inactivate particulate matter, including pathogens. 

ESI Group recently completed in-situ modelling on the Rensair air purifier within a Birmingham NHS Hospital Dental Treatment Room. Using advanced computational fluid dynamics, the results confirmed very effective air circulation and removal of aerosols generated from AGP procedures. The directional flow of air is critical to the dentist’s own safety. Deposition and near patient flow field tests demonstrated that the Rensair unit draws aerosols downwards, thereby protecting dentists from airborne contamination.

  • Questions

  • What type of air purifier is recommended for removing airborne infections?

    The World Health Organisation recommends portable air purifiers using HEPA filtration for all healthcare settings. HEPA filters and UVC are recommended by health authorities including the CDC in the USA and the SAGE committee in the UK. Rensair uses HEPA to trap and UVC to destroy harmful bacteria and viruses, delivering the requisite number of air changes to guarantee clean air and reduce downtime between appointments.

  • Can Rensair’s air purifier kill the Covid airborne virus?

    Absolutely. In a test to determine Rensair’s performance in reducing the concentration of Covid-19 particles in the air, the Danish Technological Institute recorded a particle reduction rate of 99.98% in 15 minutes and above 99.99% in 30 minutes. Furthermore, the test reported 100% elimination of virus particles on the filter, with zero traces detected, rendering it safe for easy maintenance without seeking professional help.

Get clean air for your dental practices

The Rensair air purifier technology removes 99.97% of airborne viruses, bacteria and other pollutants

Rensair’s Core hospital-grade air purifier is a heavy-duty yet portable device suited to a wide range of shared spaces, from hospitals and nursing homes to offices and hospitality venues. Learn more
Removal: Particulates
Airflow: 330 CFM
Dimensions: H: 30.3in, Ø: 14.5in
Application: Hospitals, care homes, offices, schools, clinics, gyms, hospitality, retail
Net weight: 40 lbs
Noise: 45dBA (low setting)
Connectivity: Analogue
The Compact portable air purifier is a versatile and very quiet device that’s ideal for smaller indoor spaces. It’s powerful and smart, with 5 airflow speeds, and WiFi connectivity. Learn more
Removal: Particulates
Airflow: 270 CFM
Dimensions: H: 25.6in, Ø: 11.8in
Application: SMEs, conference rooms, homes, doctor & dental surgeries
Net weight: 21 lbs
Noise: 32dBA (quiet setting)
Connectivity: WiFi (upgradeable to full IoT)
The AirBubbl provides purified air for vehicle occupants and personal spaces. It delivers 22 cubic feet of clean air every hour and removes 99% of particulate matter and noxious gases. Learn more
Removal: Particulates & gases/VOCs
Airflow: 22 CFM
Dimensions: H: 12.2in, Ø: 4.7in
Application: Cars, taxis, vans, truck & bus cabs, personal spaces
Net weight: 1.8 lbs
Noise: 44dBA (normal mode)
Connectivity: Bluetooth