3.2.6.4.

(1) The requirements of Sentences 3.2.6.2.(2)v1 and (4), and Clause 3.2.6.2.(3)(a)v1 are waived when a building is sprinklered and,

(a) the sprinkler system is equipped with a water flow and supervisory signal system that will,

(i) transmit automatically a waterflow signal directly to the fire department, or through an independent central station,

(ii) transmit automatically other supervisory signals to a proprietary control centre or to an independent central station, and

(iii) actuate a signal at the central alarm and control facility described in Article 3.2.6.12.v1,

(b) each stairway that serves storeys above the lowest exit level is vented to the outdoors at or near the bottom of the stair shaft,

(c) measures are taken to limit movement of smoke from a fire in a floor area below the lowest exit storey into upper storeys, and

(d) except for exhaust fans in kitchens, washrooms and bathrooms in dwelling units, and except for fans used for smoke venting in Article 3.2.6.10.v1, air moving fans in a system that serves more than 2 storeys shall be designed and installed so that in the event of a fire these fans can be stopped by means of a manually operated switch at the central alarm and control facility.