A utility closet with natural gas appliances needs ventilation openings of at least 100 square inches within 12 inches of the top and 100 square inches within 12 inches of the bottom, according to local code.
Does that normally mean the entire 100 square inches has to be within those
12 inches, or just that they have to start within them? For example, could you have slots going down the door such that the entire door provides 200 square inches of openings, but only some of those openings are within 12 inches of the top or bottom?These are bifold doors. If I go to Home Depot or Lowes and ask for bifold doors for a utility closet, will they know what I'm talking about, and provide doors that meet code?