Chimney liner needed when converting from tank to tankless water heater?
I am planning to have a tankless water heater installed (not looking for full payback just want continuous water, more floor space, and less natural gas consumption).
I had a couple mechanical contractors come out today to give bids. One mentioned that if I convert to a tankless water heater that I will need to have the chimney lined for my furnace vent pipe. He stated that since they will be removing the vent in the chimney that is for the current water heater, that the furnace will need a liner now to eliminate condensation.
The other guy that came to give a bid never mentioned anything about a liner.
Do I really need a liner in my chimney because I am getting rid of a tank water heater? Eventually my furnace will need upgraded and the chimney venting will be eliminated all together because of the direct venting in current furnaces. If I don’t need to get it lined I’d prefer not to spend the money.
Thanks in advance for the comments.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part