Mark P Posted May 30, 2020 Report Share Posted May 30, 2020 The metal exhaust vent is being used by the water heater (it was previously used for a furnace) the concentric vent is for a new furnace. It seems they are to close together, but I could not find any reference in my search that says they are too close. I already sent out my report and I explained my concern that the water heater's exhaust could be drawn into the concentric vent and to have the venting details looked at by a HVAC contractor and corrected if needed. What do you folks say? Quote Link to comment Share on other sites More sharing options...
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