If the AC units that are added or replaced add up to 5 or more, then plans must be prepared and submitted for approval to Mechanical Plan Check.

Residential buildings up to 3 stories in height shall have filters with Minimum Efficiency Reporting Value (MERV) of 6. Residential buildings over 3 stories in height have no requirements for MERV values. All non-residential buildings shall have filters with a MERV rating of at least 8. All buildings residential and commercial of any height located within 1000 feet of a freeway shall have filters with a MERV value of at least 13.

No, plan check is not required for ductless window units.

A hood is not required for residential kitchens. However, it is required to provide kitchen ventilation for removing moisture.

Yes, but with conditions. Contact Mechanical Plan Check for more information.

Yes, but with conditions. Residential hoods may be installed in employee kitchen areas, community centers in residential buildings, churches and similar areas that are not designed for the selling of food to the public. The cooking equipment shall be of residential grade, and a modification shall be approved by Mechanical Plan Check before installation.

Kitchen exhaust with intake from the kitchen ceiling register and bathroom exhaust can be combined using the same exhaust duct. Kitchen exhaust firm a kitchen hood shall be combined with bathroom exhaust.