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.
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.
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.
poiled foods, kitchens, bathrooms
windows, doors, carpets
moist places, bathrooms, inside pillows, humidifier
Ceiling tiles, incubators, faulty HVAC
diesel and petrol emissions
pets, floors, carpets
skin, mucous membranes, soil
burnt food, garbage, tobacco, cleaning products
skin, hair, soil, plastic, clothing
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.
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.
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.
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.
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.