Why is my Propane Furnace exaust leaking inside? : r/hvacadvice

Why does is water dripping into (what I assume is) a drain hole and should I be concerned? Was given a full service in April. : r/hvacadvice

Natural gas furnace exhaust seems to vent indoors? : r/hvacadvice

My furnace exhaust line is leaking condensate from these joints. Wondering if the installer used the wrong type of glue? How do I fix it properly? (I do have a CO detector

Natural gas furnace exhaust seems to vent indoors? : r/hvacadvice

Is it okay for the fresh air intake to be inside the house? : r/hvacadvice

Ensure your furnace is properly vented. — Healthy House

Heater exhaust duct water leak : r/hvacadvice

The Importance of Flue Pipe and Combustion Air - Bertie Heating & Air Conditioning, LLC

Why Is My Furnace Leaking Water? How To Fix It [With Pictures]

Why Does Our High-Efficiency Gas Furnace Vent Hot?

Replaced rusted and leaking furnace flue, but it continues to leak : r/ hvacadvice

Plumber here, why is my furnace exhaust leaking? Is it condensation or more likely a chimney leak? : r/hvacadvice

Any ideas what this 'vent pipe' entering furnace room is for? Furnace has intake and exhaust. Upper right big PVC intakes outside and always leaks cold or damp air into the room.