Dear all,
I would like to know if it is mandatory to comply with minimum exhaust rates indicated in TTABLE 6-4 Minimum Exhaust Rates from ASHRAE 60.1 -2010.
We think that the exhaust rate for each private toilet room (25 cfm/unit) is excessive for the areas we are considering and may cause discomfort in this area.
Thank you in advance!
Christopher Schaffner
CEO & FounderThe Green Engineer
LEEDuser Expert
963 thumbs up
March 29, 2017 - 12:25 pm
You are required to "meet the minimum requirements of ASHRAE Standard 62.1–2010, Sections 4–7". That includes the exhaust requirements of Table 6-4.
Maria Matos
April 6, 2017 - 5:00 am
Thank you Christopher. I am still having trouble to understand what rate to use. We are designing an office building with restrooms having 2 or more WC. So if using exhaustion in a non continuous system operation we would need a 50 cfm rate, considering this is a private use. Am I correct? We think this might be to excessive for the volume of the restroom, maybe we might need to adjust the height. Thank you
Christopher Schaffner
CEO & FounderThe Green Engineer
LEEDuser Expert
963 thumbs up
April 20, 2017 - 11:34 am
Public toilets are required to have continuous exhaust (Note E only applies to private toilet rooms). Although ASHRAE 62 does not explicitly define the terms, In an office building I would expect the toilet rooms to be public unless they are part of some individual's private office. A toilet room that serves an entire company, for example, would be "public" even if you couldn't come in off the street to use it.
I can't imagine 50 CFM per fixture being excessive.