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cooking environments

Developing compact air purifying systems 

for commercial and domestic 

© 2025

About

  Get to know us

Our team is developing a compact cooking extractor that is more efficient at capturing grease, smoke, and odours than recirculating fans and is easier to install. 

  Product USPs

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  Stats & Facts

of total PM2.5 emissions in London are estimated to come from commercial cooking, making it the third-largest single source of particulate matter in the city.

38% of deaths due to air pollution are attributed to household air pollution 
State Of Global Air (2024)

reduction in household air pollution-related death rates since 2000, thanks to improvements in cooking fuels and stove technology

Our Timeline​

Development and Trials 
We are currently refining our working prototype and designing internal components to reduce cost. Each version is evaluated in both controlled and real-world cooking environments to assess performance and filtration efficiency. Pilot trials are planned for this autumn with small commercial restaurants and individual users.

From Neal's Lab

From pan-seared steaks to deep-fried snacks, Neal (our Chief Scientific Officer) has been testing it all. This is where we break down the unexpected science behind everyday cooking—and share the data that’s driving our product development.

  Insights

Over 90% of harmful particles captured in  real-world cooking test
A dedicated filter was found to capture over 90% of PM2.5 particles before the air was recirculated back into the kitchen during the cooking of a typical pasta carbonara.  
What Happens to the Air When You Make Carbonara?
Measurements taken with a commercial PM sensor showed that cooking a pork belly dish for two people produced an average PM2.5 concentration of 371 μg/m³, with peak levels reaching up to 988 μg/m³ at the cooking source.
Dangerously High PM Levels During Everyday Cooking
Pork belly cooking
spikes PM2.5 to
nearly 1,000 μg/m³
According to peer-reviewed research published in Environmental Science & Technology, preparing a typical roast dinner can expose you to three times more fine particulate matter (PM2.5) than walking through a heavily polluted urban street.
Roast Dinner or Rush Hour?
Cooking a roast can expose you to 3× more PM2.5 than a city street

  The Problem 

Tackling the problem

Why We Care

Cooking releases ultrafine particles, oil droplets, and harmful gases into the air, many of which linger long after the meal is done. It’s pollution you can’t always see, but it’s affecting your health every day.
Air pollution starts indoors.
Every home is exposed
Standard kitchen extractors rarely capture pollutants effectively, especially in small or poorly ventilated spaces. The result? Trapped air that circulates fine particulates throughout your home.
Ventilation often falls short.
Exposure to PM2.5 and airborne oils has been associated with respiratory problems, cardiovascular stress, and worsened indoor air quality; particularly for children, the elderly, and people with asthma.
The Health Risk is Real
Long-term health issues

  Latest News

Want to Know More?

We’re not the only ones thinking about air pollution and commercial kitchens. Here’s a selection of articles and reports that dive into the problem—from air quality stats to overlooked industry impact. We’ll keep adding as we go.

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Westminster Council launches scheme to cut cooking emissions

Westminster City Council has launched a new pilot scheme aimed at tackling harmful air pollution caused by cooking emissions in restaurants. 

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Too many broths spoil the cook

the hidden dangers of air pollution in commercial kitchens

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Commercial cooking overtakes traffic on pollution in Islington

Fumes from food outlets now have the greatest impact on human health

© 2025

  FAQs

01
Why does someone need this?
02
What stage are you at?
03
Will your solution affect kitchen operations?
04
What makes your approach different from existing solutions?
05
What impact do you hope to have in five years?
06
Are you looking for collaborators or partners?
07
How are you funded?

About us

The Facts

Problem

Updates

Contact

Control your 

Air Quality 

© sieflo. All rights reserved. 

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Patent pending technology

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