Hi, Our home has an oil furnace and oil hot water heater. They both used to vent through the same 8" square masonry chimney, but the chimney cleaner found some large gaps between the flue tiles and recommended a chimney liner. We had the work done, but I'm worried that the liner they installed is too small. Both the furnace and the water heater had 6" round vent pipes. In order to connect them to the liner, they made a "Y" connection between the appliances into one 6" round pipe, then reduced that to 5" and connected it to the liner. So we've gone from two 6" stacks to one 5" stack. It seems to be drawing fine, but I'm worried about the possibility of backdrafts, carbon monoxide, etc. The heater is 120,000 BTU max but has a .85 gallon/hour nozzle, and the water heater is a 30 gallon unit with a smaller oil burner. (I don't know the BTUs for the water heater.) The chimney is approximately 30 feet high.
If anyone can advise us whether this is a safe installation, I'd appreciate it.
Thanks,
Mike
If anyone can advise us whether this is a safe installation, I'd appreciate it.
Thanks,
Mike