While checking out our new BC 3450TS I climbed into the basement area to clean out the sawdust left from constrution at the factory and notice light from outside coming from behind the wall that encloses the furnace , pump, wiring area. Upon further checking, it was coming from the bottom of the trailer. It turned out to be coming from three round holes cut thru the frame, one about 6 inches and two about three inches. Is this needed for possibly furnace fresh air or should it be sealed to keep out the cold air, or more important the vermin?
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