The world’s first filter-free
Air Purification Technology
Okay, we’re still filtering the air, just not like a
traditional mechanical filter
Okay, we’re still filtering the air, just not like a traditional mechanical filter


The world’s first filter-free
Air Purification Technology
Okay, we’re still filtering the air, just not like a
traditional mechanical filter

Better air quality than traditional filter solutions. Available today.
"CLER purified the indoor air at Karolinska in a way we've never seen before. Usually, we never experience air filtration above 70%
– CLER Pro removed over 95% of particles in the patient room"
"CLER purified the indoor air at Karolinska in a way we've never seen before. Usually, we never experience air filtration above 70% – CLER Pro removed over 95% of particles in the patient room"
Johan Nordenadler
PhD in Safety Ventilation, KTH
affiliated researcher at Karolinska Institutet

Johan Nordenadler
PhD in Safety Ventilation, KTH
affiliated researcher at Karolinska Institutet

Cleaner air than commonly used air filters today.
Cleaner air than commonly used air filters today.
Cleaner air than commonly used air filters today.
More sustainable. No filter waste. No disposal costs.
More sustainable. No filter waste. No disposal costs.
More sustainable. No filter waste. No disposal costs.
Lower running costs through self-cleaning and no maintenance.
Lower running costs through self-cleaning and no maintenance.
Lower running costs through self-cleaning and no maintenance.
Cleaner air with CLER Pro
CLER Pro removes particles without traditional filters. Our self-cleaning system delivers clean air down to PM2.5 and smaller, with no maintenance, no performance drops, and no filter waste.
Install once.
Run Continuously.
No filter changes.
Install it Then forget it
CLER Pro fits into existing ventilation systems. Installation takes less than a day. After that, it handles all particle types: wet, dry, grease, dust, PM2.5 and smaller. Without you having to do anything.
No clogged filters. No duct cleaning. Just clean air, continuously.
Patented technology Continuous clean air



5000G Centrifugal Force
Our Perpetual Filtration Technology (PFT) spins air at very high speeds, creating forces up to 5,000 g. This separates particles by weight and catches tiny particles down to PM0.5 without using filters.
5000G Centrifugal Force
Our Perpetual Filtration Technology (PFT) spins air at very high speeds, creating forces up to 5,000 g. This separates particles by weight and catches tiny particles down to PM0.5 without using filters.
5000G Centrifugal Force
Our Perpetual Filtration Technology (PFT) spins air at very high speeds, creating forces up to 5,000 g. This separates particles by weight and catches tiny particles down to PM0.5 without using filters.
Lamella Design Precision Separation
Hundreds of cone-shaped plates create 25,000 m² of separation surface. Air passes through narrow gaps where spinning force pushes particles away from the clean air. This keeps low pressure and steady performance no matter how many particles come through.
Lamella Design Precision Separation
Hundreds of cone-shaped plates create 25,000 m² of separation surface. Air passes through narrow gaps where spinning force pushes particles away from the clean air. This keeps low pressure and steady performance no matter how many particles come through.
Lamella Design Precision Separation
Hundreds of cone-shaped plates create 25,000 m² of separation surface. Air passes through narrow gaps where spinning force pushes particles away from the clean air. This keeps low pressure and steady performance no matter how many particles come through.
Self-cleaning technology
CLER's cleaning process uses very little liquid (0.5 dl/month for a 1,000 m² building) to automatically rinse particles from the plates. No manual cleaning. No filter changes. Just continuous operation.
Self-cleaning technology
CLER's cleaning process uses very little liquid (0.5 dl/month for a 1,000 m² building) to automatically rinse particles from the plates. No manual cleaning. No filter changes. Just continuous operation.
Self-cleaning technology
CLER's cleaning process uses very little liquid (0.5 dl/month for a 1,000 m² building) to automatically rinse particles from the plates. No manual cleaning. No filter changes. Just continuous operation.
Why CLER works
No filters to change
No ducts to clean
No interruptions
Cleaner air, continuously



No filters No waste
No filters No waste
No filters No waste
Traditional systems use filters that clog over time, block airflow, and need regular replacement. Most used filters can't be recycled and end up in landfills. Globally, filter disposal creates about 30 million metric tons of CO₂e every year. CLER's Perpetual Filtration Technology ends this cycle.
Our technology doesn't use throwaway filters, so there's nothing to replace, nothing to throw away, and no ongoing waste. Lower disposal costs. Lower running costs. Clean air delivered sustainably.
Customer cases
Customer cases
Customer cases
McDonald's Gotland eliminated filter changes and duct cleaning with CLER Pro. Three months in, the system captured over 15 liters of grease that would otherwise clog ducts and filters.
15 litres
Grease captured in 3 months


"After four months, the chimney sweep said he'd never seen cleaner ducts. Our filters looked unused and needed no replacement"
Magnus, Franchisee
McDonald's Gotland
90%
Less maintenance
McDonald's Gotland eliminated filter changes and duct cleaning with CLER Pro. Three months in, the system captured over 15 liters of grease that would otherwise clog ducts and filters.
15 litres
Grease captured in 3 months


"After four months, the chimney sweep said he'd never seen cleaner ducts. Our filters looked unused and needed no replacement"
Magnus, Franchisee
McDonald's Gotland
90%
Less maintenance
McDonald's Gotland eliminated filter changes and duct cleaning with CLER Pro. Three months in, the system captured over 15 liters of grease that would otherwise clog ducts and filters.
15 litres
Grease captured in 3 months


"After four months, the chimney sweep said he'd never seen cleaner ducts. Our filters looked unused and needed no replacement"
Magnus, Franchisee
McDonald's Gotland
90%
Less maintenance

No Cure. No Pay.
If you are not satisfied after two months, we will gladly return to remove the equipment and reinstate your previous solution at no cost and no risk.

FAQ
Instead of trapping particles in disposable filters, our system uses centrifugal force to separate them by weight and density — removing them before they enter the ventilation system.
Yes. Our solution is designed for demanding environments like Quick Service Restaurants (QSR), where traditional filters clog quickly. It separates even sticky particles like oil and grease, keeping ducts clean.
Yes. The purified air is so clean it can be safely reused in public areas, contributing to energy savings by retaining warmth from exhaust air.
They’re collected in a self-draining unit and removed from the system automatically. No manual cleaning required.
Very. It eliminates the need for disposable filters, reducing waste and CO₂ emissions from manufacturing and transportation. It’s a long-term solution designed with the planet in mind.
Yes. Our technology can be integrated into most existing ventilation systems to enhance performance and reduce maintenance.
No. The system is entirely filter-free and self-cleaning. There are no consumables or recurring maintenance parts to replace.
No — the cost is comparable to traditional systems. The key difference is that our solution eliminates ongoing expenses like filter replacements and maintenance. You get the same initial investment, but with significantly lower operating costs over time.
Instead of trapping particles in disposable filters, our system uses centrifugal force to separate them by weight and density — removing them before they enter the ventilation system.
Yes. Our solution is designed for demanding environments like Quick Service Restaurants (QSR), where traditional filters clog quickly. It separates even sticky particles like oil and grease, keeping ducts clean.
Yes. The purified air is so clean it can be safely reused in public areas, contributing to energy savings by retaining warmth from exhaust air.
They’re collected in a self-draining unit and removed from the system automatically. No manual cleaning required.
Very. It eliminates the need for disposable filters, reducing waste and CO₂ emissions from manufacturing and transportation. It’s a long-term solution designed with the planet in mind.
Yes. Our technology can be integrated into most existing ventilation systems to enhance performance and reduce maintenance.
No. The system is entirely filter-free and self-cleaning. There are no consumables or recurring maintenance parts to replace.
No — the cost is comparable to traditional systems. The key difference is that our solution eliminates ongoing expenses like filter replacements and maintenance. You get the same initial investment, but with significantly lower operating costs over time.
Instead of trapping particles in disposable filters, our system uses centrifugal force to separate them by weight and density — removing them before they enter the ventilation system.
Yes. Our solution is designed for demanding environments like Quick Service Restaurants (QSR), where traditional filters clog quickly. It separates even sticky particles like oil and grease, keeping ducts clean.
Yes. The purified air is so clean it can be safely reused in public areas, contributing to energy savings by retaining warmth from exhaust air.
They’re collected in a self-draining unit and removed from the system automatically. No manual cleaning required.
Very. It eliminates the need for disposable filters, reducing waste and CO₂ emissions from manufacturing and transportation. It’s a long-term solution designed with the planet in mind.
Yes. Our technology can be integrated into most existing ventilation systems to enhance performance and reduce maintenance.
No. The system is entirely filter-free and self-cleaning. There are no consumables or recurring maintenance parts to replace.
No — the cost is comparable to traditional systems. The key difference is that our solution eliminates ongoing expenses like filter replacements and maintenance. You get the same initial investment, but with significantly lower operating costs over time.

