If your cooker hood recirculates air back into the kitchen rather than venting it outside, a plasma filter is the most effective upgrade you can make to how that air is cleaned. Unlike a standard charcoal filter, which physically traps odours in activated carbon until it becomes saturated and needs replacing, a plasma filter uses an electronically generated ionising field to break down cooking odours, smoke, grease particles and airborne impurities as air passes through it — without a consumable cartridge that needs buying every few months.
This makes plasma filtration especially suited to kitchens where external ducting isn't possible: airtight new-builds, apartments, listed buildings, or any installation where running ducting through an outside wall isn't practical. The cooker hood still draws air up through its metal grease filters as normal — the plasma filter simply replaces the charcoal stage, treating the air before it's returned to the room.
Every unit fits onto the motor outlet housing behind the chimney section, with a reducer collar included so the same filter fits both 150mm and 125mm round outlets — making it a genuine universal fit across recirculating cooker hoods, not just Luxair models.
If your cooker hood has a 125mm outlet remove the collar provided and fit the plasma filter without the collar
Remove the chimney cover to reach the motor outlet housing.
Make sure your cooker hood has a suitable round outlet and enough space for the filter to fit inside the chimney section.
Fit the plasma filter to the top of your motor outlet and secure with fixings supplied
Save an estimated £465 over 10 years by switching from charcoal to a one-off plasma filter, no more repeat purchases every 3–4 months!
A charcoal filter is cheap to buy once, but every replacement is a repeat purchase, indefinitely, for as long as you own the hood. A plasma filter costs more initially but is designed to be a single purchase for the working life of most cooker hoods.
A Charcoal Filter saturates and needs replacing every 3–4 months, Our Plasma Filters on average are designed to last up to 10 years!
A note on inflation: The average charcoal filter cost saving is today's pricing. Charcoal filter prices are likely to rise over time in line with general inflation, whereas the plasma filter is a one-off cost that's already fixed!
This means the real-world saving from switching to plasma will typically be larger than the flat calculation above suggests, and it grows the longer you own the hood.
A plasma cooker hood filter is a long-life air filtration unit designed for recirculating cooker hoods. It helps clean the air before it is returned back into the kitchen, reducing cooking odours, grease particles, smoke and other airborne impurities.
Air is pulled up through the cooker hood by the motor, passing first through the metal grease filters, which capture heavier grease particles. It then passes through the plasma filter, fitted directly onto the motor outlet. Here, an ionising field is generated across the airflow, breaking down odour molecules, smoke, and fine airborne particles at a molecular level, rather than simply trapping them in a physical medium. The treated air is then returned to the kitchen — cleaner and largely odour-free.
Because the filtration happens electronically rather than through absorption into carbon, there's no point at which the filter becomes "full" and stops working, which is the main failure point of charcoal filtration.
Plasma filtration works on a different principle to a standard charcoal filter. Rather than physically trapping odours in a bed of activated carbon, it uses non-thermal plasma (NTP) technology to treat the air as it passes through.
As air is drawn through the filter, an electrical field generates a stream of ions. These ions attach themselves to airborne particles, odour molecules, fine grease particles, smoke, pollen and other allergens — altering their electrical charge. Charged particles are more likely to clump together, fall out of the airflow, or break down into simpler, less odorous compounds, rather than passing straight through and back into the room.
This is a continuous, self-cleaning process, there's no absorbent material inside that gradually fills up and stops working, which is why a plasma filter doesn't need periodic replacing the way a charcoal filter does. It also explains why plasma filtration is described as tackling a broader range of airborne impurities than charcoal alone: ionisation acts on particles generally, rather than relying on carbon's specific affinity for odour compounds.
No, a plasma filter is designed for recirculating installations, so external ducting is not required. This makes it ideal for kitchens where venting outside is difficult or not possible.
Yes, it can help reduce heat loss. With traditional ducted extraction, warm air is pulled out of the home. A recirculating setup with a plasma filter cleans the air and returns it back into the kitchen, helping keep heated air indoors.
A plasma filter is a longer-life, lower-maintenance alternative to standard charcoal filters. Charcoal filters need replacing regularly, while a plasma filter is designed to last for years. Plasma filtration can also help reduce a wider range of airborne impurities as well as cooking odours.
This Luxair plasma filter is supplied with a 7 year guarantee and is designed as a long-life filtration solution for normal household use.
A plasma filter is designed to be low maintenance and does not need replacing every few months like standard charcoal filters. Always follow the installation and care instructions supplied with the filter.
This universal round plasma filter is designed to fit most recirculating cooker hoods with a compatible outlet. Check your cooker hood outlet size and installation space before ordering.
No, the plasma filter is designed to work quietly and should not add extra noise to the cooker hood during normal operation.
It helps reduce cooking odours, grease particles, smoke, pollen, allergens and other airborne impurities, helping keep the kitchen air fresher and cleaner.
Yes, plasma filters are ideal for kitchens where external ducting is not available. They allow the cooker hood to work in recirculation mode by cleaning the air before returning it to the room.
No external ducting required — ideal for airtight houses, flats, and installations where venting outside isn't possible
Long-life, low-maintenance — up to 10 years' expected service life, no regular replacement
Reduces a wider range of impurities — odours, smoke, grease particles, pollen and allergens, not just cooking smells
Helps reduce heat loss — recirculated air stays in the home rather than being extracted outside with warm indoor air
Universal fit — one filter fits both 150mm and 125mm round motor outlets via the included reducer collar
Quiet operation — no added noise during normal use, and runs on low-energy 12V DC (12 watts)
