I've seen pics of HW units in enclosed trailers that look as though a section of duct has been installed on top of the burner for venting. Is this necessarry? Can the rear doors simply remain open during operation to vent the fumes? What am I missing?
I've seen pics of HW units in enclosed trailers that look as though a section of duct has been installed on top of the burner for venting. Is this necessarry? Can the rear doors simply remain open during operation to vent the fumes? What am I missing?
Thanks a bunch.
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