Improving Indoor Air Quality in a Premier Extended-Stay Suites

A supplemental exhaust fan was required in this setup because of the limitations of the principal exhaust fan.

The exhaust air intake for the principal ventilation fan is in the living area, and the principal ventilation fan is not able to exhaust at 2 & ½ times the minimum normal operating speed; thus, according to Section 9.32.3.7, a supplemental exhaust fan would be required.

For this build, they specified FRD 12-6 inline duct fans for kitchenette exhaust. According to AMCA-certified performance values, the FRD fan rates well above the minimum 50 L/s at a 0.4 in.w.g. These rectangular inline duct fans are designed for areas with limited space and large ventilation needs.

With a speed controller, the FRD fans run at different fan speeds. In this instance, the speed control option helped contractors with implementation, as the further distance from the roof, the faster the fans have to run.