The Ontario Building Code | Fan Ratings

9.32.3.9. Fan Ratings

(1) Except as provided in Sentence (4), capacity ratings for required fans shall be determined in accordance with,

(a) CAN/CSA-C260-M, "Rating the Performance of residential Mechanical ventilating Equipment", or

(b) HVI 916, "Airflow Test Procedure".

(2) Sound ratings for required fans shall be determined in accordance with,

(a) CAN/CSA-C260-M, "Rating the Performance of residential Mechanical ventilating Equipment", or

(b) HVI 915, "Procedure for Loudness Rating of residential Fan Products".

(3) Capacity ratings for required fans shall be based on a static pressure differential of 50 Pa, 25 Pa or 7.5 Pa depending on whether the fan is installed with ductwork connected on both sides, one side or neither side, respectively.

(4) Except for heat recovery ventilators, exhaust fans required to make up any part of the total ventilation capacity required by Article 9.32.3.3. shall have a sound rating not greater than that specified in Table 9.32.3.9.

Table 9.32.3.9.
Fan Sound Rating

Forming Part of Sentence 9.32.3.9.(4)

Item	Column 1	Column 2	Column 3
	Fan application	Maximum Sound Rating, sones
		Rated according to CAN/CSA-C260-M	Rated according to HVI 915
1.	Principal exhaust fan	2.0	2.5
2.	Supplemental exhaust fans installed in bathrooms and water closet rooms and their make-up air fans	2.5	3.5
3.	Supplemental exhaust fans installed in kitchens and their make-up air fans	no rating required	no rating required

(5) Required fans shall be installed according to the manufacturer's instructions.

(6) Mechanical ventilation devices shall conform to CSA C22.2 No. 113, "Fans and ventilators".