What Is the Maximum Size Furnace That Can Be Used without Fire Sepration Walls?

Answer

The maximum size furnace that can be used without fire separation walls depends on the state and/or region. In most cases, it will depend on the climate and the natural fire danger.
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It is always safest to have fire walls no matter the size of the furnace you will be using. Think of the safety of you family or the family that will be using ...
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