Originally Posted By: kmcmahon This post was automatically imported from our archived forum.
Have an issue I need clarification on.
Ok...forget that the intake and exhaust for the furnace are next to eachother...
The WH exhaust goes up the chimney flue along with the intake and forced exhaust vents from the furnace....
The WH exhaust discharges into the chimney....
This installation looks all wrong, but I need something to back up my thinking here...I can't find anything that says it's not allowed. Any help is appreciated.
Originally Posted By: gbeaumont This post was automatically imported from our archived forum.
Hi to all,
Kevin, I would firstly be looking at the manufacturerrs specs for the furnace installation, secondly I am concerned about the proximity of the water heater vent to the PVC intake and exhaust line from the furnace, there would appear to be an issue of temperature differential here. With the WH vent running a t a much higher temp than the PVC is rated for, the close proximity of one to the other cannot be correct.
Originally Posted By: kmcmahon This post was automatically imported from our archived forum.
Unfortunately, this is referring to both dumping into a common flue…here the gravity vent dumps into a chimney flue, and the forced vent travels thru that chimney and discharges outside of it.
I am hanging my hat on the fact that pvc isn't designed to be exposed to the heat generated from the WH and could damage the pvc to the point where it could have a safety and/or functional effect on the pvc.
Originally Posted By: jhagarty This post was automatically imported from our archived forum.
Changes can include a change in the fuel type, changes to the shape of, or material in, the flue (i.e. relining), or the replacement or addition of an appliance of a dissimilar type, input rating or efficiency.
The need for further review is justifiable under the circumstances. Most manufacturers also recommend a Chimney recertification of the flue when a change is made in type or efficiency of the heater.
Recommend a Level 2 Inspection of the Chimney due to the Change in Use.
Level 2 Inspections ? A Level 2 inspection is required when any changes are made to the system. Changes can include a change in the fuel type, changes to the shape of, or material in, the flue (i.e. relining), or the replacement or addition of an appliance of a dissimilar type, input rating or efficiency.
The need for further review is justifiable under the circumstances. Most manufacturers also recommend a Chimney recertification of the flue when a change is made in type or efficiency of the heater.
Excellent recommendation!
Thanks, Joe. Always nice to have a refresher. 
-- "I have never met a man so ignorant that I couldn't learn something from him."
Galileo Galilei
