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

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

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Cleaner air than commonly used air filters today. 

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Cleaner air than commonly used air filters today. 

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Cleaner air than commonly used air filters today. 

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More sustainable. No filter waste. No disposal costs.

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More sustainable. No filter waste. No disposal costs.

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More sustainable. No filter waste. No disposal costs.

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Lower running costs through self-cleaning and no maintenance.

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Lower running costs through self-cleaning and no maintenance.

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Lower running costs through self-cleaning and no maintenance.

Cleaner air with CLER Pro

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 traditional filters. Our self-cleaning system delivers continuous performance with no maintenance, no performance drops, and no filter waste. Without you having to do anything.

No clogged filters. No duct cleaning. Just clean air, continuously.

Install once.

Run Continuously.

No filter changes.

Patented technology Continuous clean air

Patented technology Continuous clean air

CLER Pro has three core components that work together.

High-speed rotation creates centrifugal force. Our lamella design separates particles by weight. And the self-cleaning system rinses everything away automatically.

No filters. No consumables.

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.

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.​​

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.​​

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 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.

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.

Get in touch!

Whether you need technical support or want to discuss a solution for your facility, leave your details and we'll get back to you.

+46 10 168 68 68
info@clerglobal.com

FAQ

How does CLER work without filters?
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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.

Can it handle greasy air from kitchens or fast food environments?
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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.

Is the air really clean enough to reuse?
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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.

What happens to the particles that are removed?
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They’re collected in a self-draining unit and removed from the system automatically. No manual cleaning required.

How sustainable is this solution?
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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.

Can this be retrofitted to existing systems?
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Yes. Our technology can be integrated into most existing ventilation systems to enhance performance and reduce maintenance.

Do I need to replace any parts?
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No. The system is entirely filter-free and self-cleaning. There are no consumables or recurring maintenance parts to replace.

Is it more expensive than traditional filtration systems?
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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.

How does CLER work without filters?
icon

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.

Can it handle greasy air from kitchens or fast food environments?
icon

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.

Is the air really clean enough to reuse?
icon

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.

What happens to the particles that are removed?
icon

They’re collected in a self-draining unit and removed from the system automatically. No manual cleaning required.

How sustainable is this solution?
icon

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.

Can this be retrofitted to existing systems?
icon

Yes. Our technology can be integrated into most existing ventilation systems to enhance performance and reduce maintenance.

Do I need to replace any parts?
icon

No. The system is entirely filter-free and self-cleaning. There are no consumables or recurring maintenance parts to replace.

Is it more expensive than traditional filtration systems?
icon

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.

How does CLER work without filters?
icon

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.

Can it handle greasy air from kitchens or fast food environments?
icon

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.

Is the air really clean enough to reuse?
icon

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.

What happens to the particles that are removed?
icon

They’re collected in a self-draining unit and removed from the system automatically. No manual cleaning required.

How sustainable is this solution?
icon

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.

Can this be retrofitted to existing systems?
icon

Yes. Our technology can be integrated into most existing ventilation systems to enhance performance and reduce maintenance.

Do I need to replace any parts?
icon

No. The system is entirely filter-free and self-cleaning. There are no consumables or recurring maintenance parts to replace.

Is it more expensive than traditional filtration systems?
icon

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.