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An On the wire story
Commercial kitchens powered by gas or propane may be exposing staff to unsafe levels of heat and pollution, according to a peer-reviewed study published in Environmental Research Letters that adds to mounting pressure on the hospitality sector to move away from fossil-fuel appliances.
Researchers from Stanford University, PSE Healthy Energy and New York University found that ventilation systems did not prevent elevated temperatures and harmful air quality in kitchens using gas-fired equipment, while all-electric kitchens were markedly cooler and cleaner.
The study, which examined 27 kitchens across California, Pennsylvania and New York, reported that gas kitchens frequently breached health-based thresholds for pollutants including nitrogen dioxide, carbon monoxide and benzene.
Stanford said the findings showed that equipment choices, not ventilation alone, were a decisive factor in whether workers were protected from exposure. In contrast, all-electric kitchens consistently recorded safer conditions, reinforcing the case that cooking technology itself can shape occupational health.
Among the most striking findings, 70% of the gas kitchens monitored exceeded the World Health Organisation’s hourly nitrogen dioxide exposure limit of 200 micrograms per cubic metre, even when extraction systems were operating.
The researchers also found that gas kitchens often became uncomfortably hot, with temperatures near ventilation outlets sometimes climbing well beyond the levels observed in electric kitchens. Electric sites, by comparison, remained substantially cooler and showed almost no nitrogen dioxide.
Advocates for electrification say the study strengthens the argument for helping hospitality businesses transition away from gas. Monica Burns, director of the Global Cooksafe Coalition, said the results showed exposure was “not purely a ventilation issue” and that it began at the fuel source.
The coalition said electric kitchens can be safer, more efficient and less polluting, though it also acknowledged that many operators would need support to meet the upfront costs of switching equipment.
References
Main reference: Public Sector Catering [1]
• This On the wire article was created using Noahwire AI and reviewed by CIBSE Journal’s editorial team
