Section 364.0404. Minimum enclosed garage ventilation.

 

(1)  Substitute the following wording for the requirements in IMC section 404.2: Automatic operation of the system shall not reduce the ventilation rate below 0.05 cfm per square foot of the floor area and the system shall be capable of producing a ventilation rate of 0.75 cfm per square foot of floor area.

(2)  This is a department alternative to the requirements in IMC sections 404.1 and 404.2: Mechanical ventilation systems for enclosed parking garages are not required to operate continuously where the system conforms to all of the following:

(a) The system is arranged to operate automatically upon detection of carbon monoxide at a level of 35 parts per million (ppm) by automatic detection devices.

(b) If diesel-fueled vehicles are stored, the system is arranged to operate automatically upon detection of nitrogen dioxide at a level of one part per million (ppm) by automatic detection devices.

(c) The system includes automatic controls for providing exhaust ventilation at a rate of 0.75 cfm per square foot for at least 5 hours in each 24-hour period.

(d) The system maintains the garage at negative or neutral pressure relative to other spaces.

CR 00-179 : cr. Register December 2001 No. 552 , eff. 7-1-02; CR 01-139 : r. and recr. (1) Register June 2002 No. 558 , eff. 7-1-02; CR 06-120 : r. and recr. Register February 2008 No. 626 , eff 3-1-08; CR 10-103 : am. (1) and (2) (c) Register August 2011 No. 668 , eff. 9-1-11.