Commercial Restroom Exhaust Fan Sizing

Commercial and industrial ventilation can be expensive to install or update and finding the right type and size of fan will keep companies and industries in compliance with codes and regulations.

Commercial restroom exhaust fan sizing. Here s how we get this number. This fan calculator is typically used to calculate the cfm or cubic feet per minute of air exchange that may be desired in a building. The illustration above demonstrates the use of a ceiling exhaust fan mounted in the rest room exhausting the stale air. To arrive at your required cfm simply divide your bathroom s volume by 7 5.

10ft 10ft 8ft 7 5 106 67 cfm. You will find our fans in every type of commercial institutional and industrial buildings. The formula to calculate bathroom exhaust fan size reads as follows. Whether exhausting air or bringing fresh air into a structure the calculation produced should help to figure out the size of fan s required to accomplish the air exchanges needed.

Number of exhaust grilles the design in f includes four exhaust grilles one over each ater closet and one over the bank of urinals. Sizing and finding high quality low maintenance exhaust and air movement equipment can save money for agencies and business owners. Greenheck is the leading supplier of air movement control and conditioning equipment including fans. It may seem to make sense to exhaust above each xture.

A commercial restroom will require air to be changed 8 12 times an hour depending on the size of the facility and your local code. For a standard 10ft by 10 ft bathroom with an 8 ft ceiling you will need an exhaust fan capable of 106 67 cfm. Bathroom fan exhaust size calculator. Sizing for large bathrooms for bathrooms over 100 square feet exhaust fans can be sized according to the number of fixtures in the room.

Cubic volume 7 5 cfm necessary. 50 cubic feet per minute cfm intermittent or 20 cfm continuous. In our example restroom the exhaust rate at 0 cfm 3 s per plumbing xture ould be 420 cfm 210 s figure 2 don from 0 cfm 280 s based on 10 ach f. Determining the best location for a fan depends on the airflow pattern desired and the physical characteristics of the building.

This exhaust air can be routed either to the roof using ductwork and a roof vent or to the side. By surveying the building structure and visualizing how the air should flow the place to locate the fan usually becomes evident. Why your bathroom should have an exhausting vent fan bathroom venting fans are about more than just eliminating noxious odors. Cubic feet per minute cfm.