(a) Auxiliary fans shall meet the following requirements:
- (1) A right hand and left hand mount driver defroster fan shall be installed in all Type B, Type C, and Type D units;
- (2) A fan for the left side shall be placed in a location where it can be adjusted to its maximum effectiveness;
- (3) A fan for the right side shall be in a location where it can be adjusted to its maximum effectiveness;
- (4) The fan shall be a minimum six-inch diameter; and
(5)
- (A) The fan shall be covered with a protective cage.
- (B) A separate switch shall control the fan motor.
- (b) The body shall be equipped with a suitably controlled ventilating system of sufficient capacity to maintain the proper quantity of air under operating conditions without opening windows except in extremely warm weather.
- (c) Static-type nonclosable exhaust ventilation shall be installed in a low-pressure area of the roof.