Technical Booklet K Ventilation·Page 16·1.10(c)
Rapid ventilation for occasional and accidental pollutant release
Buildings must provide rapid ventilation to quickly remove high concentrations of pollutants and water vapour from occasional activities like painting or accidental releases like smoke or water spillage.
provide rapid ventilation throughout the building to aid removal of high concentrations of pollutants and water vapour released from occasional activities such as painting and decorating or accidental releases such as smoke from burnt food or spillage of water. (Rapid ventilation provisions may also be used to improve thermal comfort such as for summertime cooling, although this is not controlled under the Building Regulations).
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/Technical Booklet K - Ventilation.pdf