In Ontario,
Not an Electrical safety Code Requirement, but a Building Code Rule.
Under the Ontario Building Code:
9.32.3.4. Principal Exhaust
(2) Except as permitted in Sentence (3), the principal exhaust fan shall be controlled by a manual switch.
(3) A principal exhaust fan required under this Article may be controlled by a dehumidistat or other automatic control
device where the manual switch required in Sentence (2) is capable of activating the fan regardless of the setting of the
automatic control.
(4) The switches required in Sentences (2) and (3) shall be centrally located in the dwelling unit and shall be identified
with the words VENTILATION FAN.
(5) The principal exhaust required in this Article may be provided by means of a heat recovery ventilator installed in
accordance with Article 9.32.3.11.
Tony Moscioni ~
Electrical Inspector
Electrical Safety Authority
Phone: 416-991-4145
Tony.Moscioni@ElectricalSafety.on.ca
