What's wrong with this flue system and how would you remedy it?
11 yr old 2 story home zoned up and down. 2nd floor is 1/2 the size of first floor.
2 Carrier 80% 80,000 btu furnaces with 4" flues
2 40,000 btu water heaters with 3" flues
All flues single wall into single wall 8" which goes into 8" vertical double wall with 30' rise
Flue system all original except for 6 mo old 3" water heater flues which were replaced when orig. water heaters were replaced 6 mo ago.
(Single wall 8" continues about 3' to the right out of picture range before tieing into 8" double wall riser)
2 yrs ago large amounts of rust began falling out of furnace flues onto top of furnaces and you can hear dancing rust when inducer motors start.
Showing signs of acidic condensation & flue connections starting to rot.
[Edited by midhvac on 03-04-2004 at 02:47 PM]