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Jaime Graymead
August 3, 2020
  • H14 HEPA Air Purifier Air Changes Calculator June 25, 2020

    With our product launch of the updated H14 HEPA Air Purifier, we have worked hard to provide clear information to our customers.

    It is important to work out the air change rate for an air purifier, in order to know how many times the air in a room is getting cleaned. Air change rates can be calculated with the airflow duty of the air cleaner and size of the room.

    We wanted a simple solution to allow our customers to check and calculate air change rates , so we developed an Air Change Calculator with the options for HAP500 and HAP675. The calculator will dynamically change as you enter the information to quickly get results of different room sizes and units.

    For context of the H14 HEPA Air Purifier air flow rates:

    • HAP500 has a rated airflow of 500m3/s (excluding activated carbon filter)
    • HAP675 has a rated airflow of 675m3/s (excluding activated carbon filter)
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  • UPDATED PRODUCT : H14 HEPA Air Purifier June 12, 2020

    H14 HEPA Air Purifier

    • H14 HEPA Air Purifier / Air Cleaner incorporating 3 stage filtration for cleaning the air in indoor environments.
    • Removes Fine particulates down to 0.1 microns with a leak tested True H14 HEPA Filter to EN 1822
    • Removes Coarse Particulates using a 65% Coarse Panel Air Filter to ISO 1689
    • Removes Odours, VOCs and pollutant gases with a deep bed activated carbon filter
    • Powerful fans operate up to 500m3/hr (small) and 700m3/hr (large)
    • The air purifier / air cleaner can be ducted for use in medical isolation rooms
    • The Air Purifier can be ducted and combined with fan coil vent systems in offices to improve filtration
    • All Filters, and the Air Purifier Manufacture in our Kent, UK factory.

    Technical Bulletin

    Read our Technical Bulletin, of how our products can be installed to add HEPA filtration to your setting.

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  • Spray Booth Air Filters – A Brief Overview May 28, 2020

    TECHNICAL BULLETIN: Spray Booth Air Filters – A Brief Overview
    Date: 28th May 2020

    Airclean offer a complete range of air filters for use in wet and dry spray booths.  Our customers include car body shops, furniture makers, carpenters, glass companies, and fabrication shops who rely on quality spray booth filters for their business operations.  This post gives a quick overview of the range of spray booth filters, and where you may see them as part of a spray booth extraction system.

    Primary Spray Booth Filtration – Over-spray / Paint Arrestor

    Primary filtration for spray booths is used to remove the bulk of wet and dry over spray.  This filter generally spans the “Spray / Wet Zone” of a spray booth to capture paint that does not land on the final product.  These products are the basic minimum filtration for any spray booth set up.

    Dry Glass Media  – (Paint Arrestor / Paint Stop)
    Dry Glass Fibre Media is often referred to as paint arrestor or paint stop and comes in a roll form.  This filter media has excellent holding capacity for wet and dry spray booth applications.

    Spray Booth Filter Paint Arrestor - stop

    Pleated Cardboard Spray Booth Filter (Binks-Bullows Filter / Andreae Filter)
    Constructed from two sheets of heavy paper containing staggered rows of perforations, to catch and deposit the over-spray.  The working section of the filter is pulled across the spray booth and secured.  Once the filter becomes too dirty / paint laden to use, it can be cut and removed allowing for a new filter section to be pulled across.

    spray booth filter cardboard concertina binks bullows

    Secondary Spray Booth Filtration

    Secondary Filters in spray booth extraction systems are for the capture of finer spray particulates.  This material would go after the primary filter, and is generally installed to protect the ductwork, fan, and also to clean air prior to discharge outside.

    Blue and White Secondary Synthetic Filter Media for Spray Booths
    Secondary Filter Media for Spray Booths is usually Blue and White in colour and is a synthetic material that comes on rolls that can be cut to size. This quality media has a high loft for a high capture rate and long life.

    Secondary spray booth blue white filter media

    Spray Booth Supply Air Filters

    Supply air to a spray booth should be filtered to protect the product from particulates that may damage the final finish.  This is essential where high quality finishes are desired on items such as cars, or furniture, or where the air surrounding the spray booth is dusty in locations such as woodwork shops.  We would usually expect Supply Air to be filtered to grades G4 or M5 to EN779.

    M5 Spray Booth Ceiling Filter

    M5 Ceiling Filter is commonly seen in car spray booths mounted above the vehicle where air is supplied into the booth.  This air filter is high quality, usually white in colour, is often sticky to the touch and has rubber backing.  These properties help to lock in captured particles, and prevent them from falling onto the product below them.  This material is available on rolls, but due to its awkward bulky nature is often cut to size by the manufacturer.

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  • HEPA Filters – Retrofitting in Various Scenarios May 20, 2020

    TECHNICAL BULLETIN : HEPA Filters for Infection Control – Retrofitting in Various Scenarios
    Date: 22nd May 2020

    This technical bulletin aims to explain various scenarios and methods of using HEPA filters to introduce infection control in the workplace, hospitals, homes, schools, and other indoor environments.

    Improved ventilation and infection control are becoming a requirement in all indoor environments in light of the Corona Virus Pandemic.  In some scenarios this will include HEPA filters which can be difficult to retrofit into situations due to their high resistance to airflow, bulky nature and specialist installation requirements.

    The following scenarios show how the Airclean HEPA Air Purifier, or Airclean Fan + Filter Indoor Air Quality Filtration System, can be used to quickly retrofit HEPA filtration into your indoor environment, with minimal disruption.

    Fan + Filter IAQ
    H14 HEPA Air Purifier / Air Cleaner - True HEPA + Activated Carbon
    HEPA Air Purifier
    hepa filter terminal housing
    HEPA Filter Terminal Housing


    Extract : Standalone fan extracts through wall mounted HEPA Terminal Housing maximising infection control, both in and out of the room.

    H14 HEPA Air Purifier / Air Cleaner - True HEPA + Activated Carbon


    Extract : Airclean HEPA Air Purifier in extract setup discharging through wall or window, to put room under negative pressure.

    H14 HEPA Air Purifier / Air Cleaner - True HEPA + Activated Carbon

    DENTIST – Negative Pressure

    Extract : Airclean HEPA Air Purifier in extract setup discharging through wall or window, to put room under negative pressure.

    All Scenarios – No HVAC Option – Care Home, Office, School, etc…

    The Airclean HEPA Air Purifier will improve air quality, and reduce infection transmission in any scenario, independent of existing heating and cooling systems, by recirculating and cleaning the air.

    H14 HEPA Air Purifier / Air Cleaner - True HEPA + Activated Carbon

    FAN COIL SYSTEMS – Scenario 1 (Restaurants, Offices)

    The Airclean HEPA Air Purifier can be mounted in a room and ducted to supply fresh clean air to the back of existing fan coil air conditioning. The fan in the Air Purifier allows the system to be balanced, allowing existing fan coil fans, to handle the strain.

    H14 HEPA Air Purifier / Air Cleaner - True HEPA + Activated Carbon

    FAN COIL SYSTEMS – Scenario 2

    The Airclean Fan + Filter Unit can be mounted in the ceiling void supporting an existing fan coil, or air handling unit, to improve filtration. The fan within the Fan + Filter Unit removes any additional load on existing equipment.

    H14 HEPA Air Purifier / Air Cleaner - True HEPA + Activated Carbon

    For more information, or to discuss you HEPA filter requirements please contact our technical team at, or call 01622 832777

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  • Particle Size Comparison Technical Bullitin May 13, 2020

    We have designed a new Technical Bulleting surrounding the size of particles in microns.

    A similar chart has been available as a technical bulletin for many years. We has revamped this in April 2020 amidst the corona virus pandemic as part of the Airclean information suite for the understanding of Corona Virus
    and filtration.

    The following chart is a generalised summary of particle sizes that are encountered in both indoor and outdoor environments in microns. This chart can be used as guidance in the selection of air filters.

    Particle Size Comparison Chart in Microns - Air Filters
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