Plan check is required when the aggregate cooling or the heating in the building exceeds 500,000 BTU/hr.

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

Please see Section 403.7 of the Los Angeles Mechanical Code (LAMC) for the requirements concerning garage ventilation systems.

Yes, but only when the area of the open window and the distance from the window to the furthest location in the room comply with the requirements of Title 24.

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.

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.