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Question about adding a fresh air pipe to boiler room
So here’s my story and question. We have a high efficiency Dunkirk gas boiler in a separate room in finished basement alongside a direct vent on demand Rinnai tankless hot water heater. We installed the water heater 10 years ago and the boiler 16 years ago. Once we replaced the hot water heater and it no longer vents through chimney we’ve had issues with carbon monoxide in home. The chimney has a new liner that we installed two years ago hoping to resolve the issue. The hvac guy seems to think that the chimney gets cold and when the heat does kick on it takes a long time for the air to go up the chimney so the carbon monoxide comes back into the house. Actually had the fire department here last night. There is a louvered door to the boiler room. There is a window in the basement that we now have cracked open. The hvac guy wants to come and cut a 5 inch hole in the side of the house and run a pvc pipe into the boiler room to bring in fresh air so we don’t have to leave the window open. Is this right? There isn’t a baseboard in the basement and the only heat down there comes from the warmth of the boiler room itself. There are also most of my hot and cold water pipes exposed in the boiler room as well. I’m afraid the basement will get cold, the pvc pipe will condensate, the water pipes will freeze as well as a million other concerns. Anyone have any suggestions? I live in New York where our winters can be very cold. Thank you