Ductwork

Clean Air offers an extensive range of ductwork and ventilation fittings to complement our range of corrosion resistant extract fans for fume cupboards and school fume cupboards. All pipework is manufactured to meet BESA DW/154 Specification for Plastics Ductwork which is the premier specification for PVC and PP-S (polypropylene) ducting.

Clean Air’s expert team will guide you to the ductwork and ventilation system that best suits your needs. From design through to installation – just contact us to discuss your requirements.

Our PVC & PP-s fittings are manufactured in our Manchester factory by our time-served craftsmen. We use blow and injection moulding techniques. This ensures a smooth internal bore in the ventilation ducting which results in minimal air turbulence.

All Clean Air’s PVC and PP-s materials are ideally suited for safely conveying aggressive media in chemically corrosive environments. We have successfully installed our extract systems in pharmaceutical, life sciences, laboratories, chemical processing, and waste water treatment settings.

Glass Fibre Reinforced Plastic (GRP) Options

Where ducting is required in larger sizes, it can be externally reinforced with a GRP laminate by our experienced in-house team. The GRP laminate provides UV protection, increased strength and a shatterproof layer to fan casings and ductwork systems.

We can colour pigment the GRP laminate to any available RAL colour. This is useful for clients who wish to colour match fans and ductwork to brickwork on older and listed buildings.

White pigment is popular for systems that are installed in hot countries as the white pigment reflects the heat.

Bespoke Fabricated Ductwork

With our wide range of equipment and team of highly skilled plastic fabricators, we have the manufacturing capabilities to produce bespoke fabricated ductwork to your specification.

Circular duct diameters are available up to Ø3m. Rectangular ductwork can also be fabricated and tailored to suit your dimensional requirements. We make ductwork routes including radius bends, transformation sections etc. in line with widely accepted specifications such as BESA DW/154.

Filter Your Way to Safety

Particulate Pre-Filters

Provided before the main filter to remove larger particulates such as airborne dust from the airstream to protect and extend the lifespan of the main filter. Manufactured from pleated media or fibreglass to suit the application required.

Pre-filters should be changed on a regular basis depending on the level of use which ordinarily would be between 3 months and 6 months – actual timescales would be realised based on regular monitoring over time.

Main Carbon Filter

Provided for odour and gas removal. The type of carbon used depends on the contaminants to be removed. Dedicated carbons can be provided for specific chemicals and processes or blended carbons can be provided for a range of contaminants known to be used.

Carbon filters may have a lifespan up to 5 years, but the actual lifespan will depend on the type and volume of contaminants it is required to remove.

Regular monitoring will provide a more accurate timescale of lifespan from which a regime of replacement can be adopted to suit. Through experience we see our clients adopting a regime of replacement anywhere between 12 months and 36 months.

Main HEPA Filter

Provided for the removal of particulates. The type of HEPA filter provided is dictated by the particle size to be removed and the stated particle filtration efficiency would range from between 95% to 99.99999%.

As a HEPA filter becomes ‘dirty’ it increases the resistance through the extract system which in turn reduces the airflow through the fume cupboard. This will result in an airflow alarm.

To overcome this a filter compensation system can be installed which will simulate ‘dirty’ condition from clean and adjust accordingly as required.

Filter Housings

Either a built-in component of a recirculatory fume cupboard or a standalone unit fitted within the extract system.

Standalone filter housings tend to be a permanent fixture within the extract system to allow the removal and replacement of pre and main carbon/HEPA filters.

Safe change filter housings can also be supplied which allows the bagging of filters during removal if required.

Contact our friendly team to discuss your project.

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