Technical Booklet K Ventilation·Page 22·2.11 - System 1
System 1: Background Ventilators and Intermittent Extract Fans
System 1 uses background ventilators and intermittent extract fans, with guidance on minimum provisions for extract and whole dwelling ventilation including separate guidance for dwellings with habitable rooms with only a single exposed façade.
System 1 – Background ventilators and intermittent extract fans. Guidance on minimum provisions for extract and whole dwelling ventilation is set out in paragraphs 2.12 to 2.40. Note that it includes separate guidance for dwellings with habitable rooms with only a single exposed façade.
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