Chimney Suction Calculator: m³/h for Your Kitchen

Quick answer

A chimney should change your kitchen's air about 10 times an hour. Multiply kitchen volume in cubic metres by 10, and add 20–30% for Indian cooking with tadka and frying. A 10 × 8 × 10 ft kitchen (about 22.7 m³) needs roughly 280 m³/h, so a 1,000–1,200 m³/h chimney gives plenty of headroom. Match chimney width to your hob: 60 cm for 2–3 burners, 90 cm for 4.