[Rathji]

Originally Posted by First Lady

You mean something like this: http://www.municipalaffairs.alberta....hure-Final.pdf

Just to point something out: The most important thing in that document is this line:

Please consult the appliance manufacture’s installation instructions to determine if increased clearances are required.

Laws about how products are to be used safely are almost always dependent, in some regard, upon the item in question. If the item was made to be legally sold in a jurisdiction, then anything it says about installing is often taken as more important than what the code (or law) says, because the law will often refer to that specification.

For example, the laws regarding car seat use are almost all worded "when used in accordance to the manufacturers specifications" because there is no way that laws can be written to cover every single product that comes out. However, you can easily have every product (and it's specifications for use) meet a level required by a certification body (like the CSA), for sale/use in a juristriction.