Intervention
Range hoods and kitchen exhaust
Part of: Ventilation
Also: range hood, cooker hood, extractor hood, kitchen extract, extractor fan
An extract fan over the cooking surface that captures the plume before it mixes into the room and discharges it outdoors. Capture, not airflow, is what decides its effect — and a hood that recirculates through a filter captures nothing.
What it is
A range hood is source control applied at the moment of emission: it works on the plume rising from the pan and the burner, before that plume becomes room air. That is why it is the most effective single measure against cooking emissions and why its performance is so uneven in practice.
What decides the result is capture efficiency — the fraction of the plume the hood actually takes — and capture depends on geometry more than on fan power: how far the hood overhangs the cooking surface, how high above it, whether the back burners or the front are in use, and whether the fan was switched on before the pan heated rather than after the smoke appeared.
Two failure modes recur. A recirculating hood passes air through a filter and returns it to the kitchen, which removes grease and odour and leaves nitrogen dioxide and fine particles in the room. And a ducted hood in a tight dwelling cannot extract air that has no way of getting back in.
What the studies report
| Linked to | Effect | Population | Study design | Source | Checked |
|---|---|---|---|---|---|
| Nitrogen dioxide (NO₂) | difference 12.7 | children's households with gas stoves · kitchen | pilot before-after trial in 14 homes with gas stoves and children: a video-based educational intervention on cooking ventilation plus range hood replacement where needed, with real-time NO2 and PM2.5 during cooking events and passive NO2 samplers over the pre- and post-intervention intervals | F-0676 Holm Measured air quality impacts after teaching parents about co… (2025) | machine |
| Nitrogen dioxide (NO₂) | difference 470 | children's households with gas stoves · kitchen | pilot before-after trial in 14 homes with gas stoves and children: a video-based educational intervention on cooking ventilation plus range hood replacement where needed, with real-time NO2 and PM2.5 during cooking events and passive NO2 samplers over the pre- and post-intervention intervals | F-0677 Holm Measured air quality impacts after teaching parents about co… (2025) | machine |
| Nitrogen dioxide (NO₂) | difference 1.0 | children's households with gas stoves · kitchen | pilot before-after trial in 14 homes with gas stoves and children: a video-based educational intervention on cooking ventilation plus range hood replacement where needed, with real-time NO2 and PM2.5 during cooking events and passive NO2 samplers over the pre- and post-intervention intervals | F-0678 Holm Measured air quality impacts after teaching parents about co… (2025) | machine |
| Particulate matter (PM₂.₅ and PM₁₀) | difference 20 | — · kitchen | field comparison of cooking emission mitigation strategies in apartments: an advanced control that runs the stove hood automatically against a standard control where the occupant switches it on, with fine particulate matter logged in the kitchen and in the whole apartment | F-1558 Pantelic Comparison of cooking emissions mitigation between automated… (2024) | machine |
| Nitrogen dioxide (NO₂) | difference 35 | households with gas or propane stoves · kitchen | field measurements of NO2 emissions and concentrations from gas and propane stoves in more than 100 US homes, with hour-averaged kitchen concentrations measured with and without outside-venting range hoods in a subset of five randomly selected homes; national exposure and health burden then modelled | F-0661 Nitrogen dioxide exposure, health outcomes, and associated d… (2024) | machine |
| Nitrogen dioxide (NO₂) | difference 10 | households with gas or propane stoves · kitchen | field measurements of NO2 emissions and concentrations from gas and propane stoves in more than 100 US homes, with hour-averaged kitchen concentrations measured with and without outside-venting range hoods in a subset of five randomly selected homes; national exposure and health burden then modelled | F-0662 Nitrogen dioxide exposure, health outcomes, and associated d… (2024) | machine |
| Nitrogen dioxide (NO₂) | difference 70 | households with gas or propane stoves · kitchen | field measurements of NO2 emissions and concentrations from gas and propane stoves in more than 100 US homes, with hour-averaged kitchen concentrations measured with and without outside-venting range hoods in a subset of five randomly selected homes; national exposure and health burden then modelled | F-0663 Nitrogen dioxide exposure, health outcomes, and associated d… (2024) | machine |
Each row is one Finding — a sentence as printed in one study, recorded with its page in the Coridum Knowledge Base. Follow the Finding number for the exact wording and the citation. Checked says who verified the row: machine means every automatic check passed and the surrounding text was read; person means someone read the sentence in the document. Rows are re-checked by a person over time. The studies are curated in the Coridum Knowledge Base; the reading of them together is a Claim, shown separately.
Cite this page
Coridum Research. Range hoods and kitchen exhaust. Coridum Knowledge G-0137, 16 September 2026. https://coridum.com/k/G-0137/