What Is The Difference Between A Direct Vent And Non-direct Vent Furnace?
What Is The Difference Between A Direct Vent And Non-direct Vent Furnace? Direct vent (two-pipe) vent system – This system uses one pipe to bring in outside air for combustion and another to remove exhaust gases. Non-direct (single-pipe) vent system – This system uses only one pipe to remove exhaust gases. What is a non-direct