Ashrae 62.2 Kitchen Exhaust. Exhaust fan shall be sized according to ASHRAE Standard 622 Table 71 see ASHRAE Standard 622 Table 71 on page 3. A full bathroom with a shower or tub needs 50 CFM.
In ANSIASHRAE Standard 622-2007 Section 53 and Table 52 relating to continuous mechanical exhaust requirements for kitchens. Kitchen exhaust fans used to comply with Section 52 shall be rated for sound at a maximum of 3 sone at one or more airflow set-tings greater than or equal to 100 cfm 47 Ls. ASHRAE 622 2010 has provisions for three basic ventilation strategies that can be used for whole-house ventilation.
Room exhaust Ffans used to comply with Section 52 shall be rated for sound at a maximum of 3 sone unless their maxi-mum rated airflow exceeds 400 cfm 200 Ls.
ASHRAE Standard 622-2010 Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings is the national ventilation standard of design for all homes and up to three-story multifamily buildings. ASHRAE 622 - 2013. Provides alternative method of meeting local exhaust requirements in kitchens and bathrooms that do not have the existing LOCAL fan flow required by ASHRAE 622-2013. February 2012 ASHRAE Journal 55.
