Hi Jim, I read that section-- problem is that there is no heat register in that room. There is no cover on the back or front side-- it really is a decent sized opening. It just seems like it will screw with the design-- I would guess close to half of the air will end up coming from the laundry room, but I could be wrong. I have been told that all of the units throughout the high rise are this way (new high rise adjacent to the new OHSU building). Here's the code: - M1602.2 Prohibited sources. Outdoor and return air for a forced-air heating or cooling system shall not be taken from the following locations: - - 1. Closer than 10 feet (3048 mm) to an appliance vent outlet, a vent opening from a plumbing drainage system or the discharge outlet of an exhaust fan, unless the outlet is 3 feet (914 mm) above the outside air inlet. - - 2. Where flammable vapors are present; or where located less than 10 feet (3048 mm) above the surface of any abutting public way or driveway; or where located at grade level by a sidewalk, street, alley or driveway. - - 3. A room or space, the volume of which is less than 25 percent of the entire volume served by such system. Where connected by a permanent opening having an area sized in accordance with ACCA Manual D, adjoining rooms or spaces shall be considered as a single room or space for the purpose of determining the volume of such rooms or spaces. - - - Exception: The minimum volume requirement shall not apply where the amount of return air taken from a room or space is less than or equal to the amount of supply air delivered to such room or space. - - 4. A closet, bathroom, toilet room, kitchen, garage, mechanical room, furnace room or other dwelling unit. - - 5. A room or space containing a fuel-burning appliance where such room or space serves as the sole source of return air. - - Exceptions: - - - 1. The fuel-burning appliance is a direct-vent appliance or an appliance not requiring a vent in accordance with Section M1801.1 or Chapter 24. - - - 2. The room or space complies with the following requirements: - - - - 2.1. The return air shall be taken from a room or space having a volume exceeding 1 cubic foot for each 10 Btu/h (9.6 L/W) of combined input rating of all fuel-burning appliances therein. - - - - 2.2. The volume of supply air discharged back into the same space shall be approximately equal to the volume of return air taken from the space. - - - - 2.3. Return-air inlets shall not be located within 10 feet (3048 mm) of any appliance firebox or draft hood in the same room or space. - - - - 3. Rooms or spaces containing solid-fuel burning appliances, provided that return-air inlets are located not less than 10 feet (3048 mm) from the firebox of such appliances. Thanks for the replies all, My vacation awaits..............