Premium Choice Brochure

Floor Area

(sq. ft.)

Number of Bedrooms

0-1 2-3 4-5 6-7 >7

CFM Requirements

<1500 30 45 60 75 90

1501-3000 45 60 75 90 105

3001-4500 60 75 90 105 120

4501-6000 75 90 105 120 135

6001-7500 90 105 120 135 150

>7500 105 120 135 150 165

Local Exhaust Requirement

A local mechanical exhaust system shall be

installed in each kitchen and bathroom:

• Kitchens: 100 CFM intermittent or 5 ACH

continuous (based on kitchen volume)

• Bathrooms: 50 CFM intermittent or 20 CFM

continuous

Use a PC Premium Choice Bath Fan in each

bathroom to meet the ASHRAE 62.2 Local

Exhaust Requirement. Please note each

bathroom fan counts towards meeting the

ASHRAE 62.2 Whole Building Requirement.

Whole Building Requirement

Required ventilation is based on the size of the

house and number of expected occupants.

1. Calculation:

Required Rate = Floor Area / 100 + (Number

of Bedrooms + 1) x 7.5

If the number of occupants exceeds the

assumed 2 persons for the rst bedroom

and 1 for each additional room, increase

the ventilation rate as follows: Number of

additional occupants x 7.5 CFM

2. Use the Whole Building Ventilation

Requirements CFM chart from the ASHRAE

62.2 Standard:

ASHRAE 62.2

The ASHRAE 62.2 Standard applies to all residential spaces that are “intended for human

occupancy” in single family homes and multi-family structures up to three stories. These spaces

include living rooms, bedrooms, kitchens, bathrooms, hallways, closets, store rooms, laundry

rooms, garages, and basements.

There are two components of the ASHRAE 62.2 standard that relate to ventilation fans: Whole

Building Ventilation & Local Exhaust.