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Table 1: Extract ventilation rates
Room	Minimum intermittent extract rate (litres/s)	Continuous extract (litres/s)
	Minimum high rate	Minimum low rate
Kitchen	30 (adjacent to hob) or	13
	60 (elsewhere)	13
Utility room	30	8
Bathroom	15	8
Sanitary accommodation	6	6
Total extract rate must be at least the whole building ventilation rate in Table 2 below

Table 2: Whole building ventilation rates
	Number of bedrooms in dwelling
	1	2	3	4	5
Whole building ventilation rate (litres/s) 1, 2	13	17	21	25	29
1. In addition, the minimum ventilation rate should be greater than 0.3 litres/s per m2 internal floor area
2. This is based on two occupants in the main bedroom and a single occupant in all other bedrooms. If a greater level of occupancy is expected, then add 4 litres/s per occupant.

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