GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter X Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Clarify the ASHRAE 62.2 ventilation rate spec.

wolley | Posted in General Questions on

It says 1cfm per 100 square feet of occupiable space and 7.5cfm per occupant
My question: for how many minutes? … 1cfm for an hour, 6 hours, all day?

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.

Replies

  1. GBA Editor
    Martin Holladay | | #1

    Wayne,
    That's the spec for continuous ventilation (24 hours per day). If the calculation tells you that you need 100 cfm, you can ventilate continuously at 100 cfm, or (for example) for 30 minutes every hour at 200 cfm.

    Of course, many homeowners choose to operate their ventilation equipment at a rate that doesn't meet ASHRAE 62.2.

Log in or create an account to post an answer.

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |