Is it safe to cook stir-fry in an open-plan kitchen with the range hood off?

What's actually in it

Stir-frying hits oil past its smoke point and ejects a cloud of cooking oil fumes (CoFs) loaded with PAHs, aldehydes, ultrafine particles, and heated oil aerosol. In a closed kitchen, the hood captures most of it. In an open-plan kitchen, the fumes spread into the dining and living rooms, then settle onto couches and curtains.

The heated oil chemistry produces PAHs like benzo[a]pyrene, which is a known carcinogen when inhaled regularly.

What the research says

A 2026 study in Environ Sci Technol looked at spatiotemporal evolution, secondary transformation, and control of cooking oil fumes in open-plan kitchens. The fumes spread quickly across the open floor plan, and secondary reactions in indoor air produced additional harmful compounds. Range hood efficacy dropped significantly without proper capture and airflow.

For open-plan homes, the defense stack: turn the hood on before the pan heats up, cook on back burners when possible, use an oil with a high smoke point (avocado, ghee, refined coconut) for stir-fry, keep the pan temperature just below smoking, and open a window on the opposite side of the room for cross-ventilation. After cooking, run the hood for 10 minutes with the window open. For high-fume dishes, cook outdoors on a portable burner if weather allows.