exoair master ltd

Rochester: 01634 296400

Kitchen Ventilation Solutions

Electrostatic Filters (ESP)

An Electrostatic Filter (ESP) utilises the principle of Electrostatic Precipitation.

Air is drawn through the ESP filter by the system fan through washable metal mesh pre filters which trap the largest dust particles. The remaining particles, some as small as 0.01 microns, pass into a strong electrical field (ionizing section) where the particulate receives an electrical charge. Provided the systems are correctly sized and maintained, system efficiencies of between 90-98% are achievable, with a low system pressure drop across the unit.

The charged particles then pass into a collector plate section made up of a series of equally spaced parallel plates, each alternate plate is charged with the same polarity as the particles, which repel, while the interleaving plates are grounded, which attract and collect the particulate.

Regular cleaning of the filters, ioniser and collector cells is required to maintain the ESP Filter’s efficiency. We offer a service and maintenance programme including a filter cell laundry and swap out service, ensuring your system is always cleaned and sanitised.

This cost effective and proactive service is available by taking out a maintenance contract, which ensures that your systems optimal service frequency is implemented and your system is fully operational and efficient at all times.

Utilising our laundry and maintenance service ensures that the impact on the rest of the system is minimised and duct cleaning frequencies are kept to a minimum.

The Cell and Filter laundry service is a multi-stage process to ensure the Cells are returned to site in a ‘new’ condition. Our process starts with your dirty cells being removed from site in a sealed box and returned to our cleaning facility where the cell is degreased, cleaned, rinsed, sanitised and dried prior to testing, ensuring the cell will operate properly when returned to site. The box is also cleaned, sanitised, dried and the cell returned to the box and stored ready for transportation to site on our next visit.

The same process is repeated for the mesh filters.

Please contact us for further information the maintenance of these systems.


24 hours per day
365 days per year
99% first time fix rate