In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
A question about CPVC venting. Although CPVC has a higher temp rating than PVC (and PVC is suspected of leaching chlorides and damaging stainless steel heat exchangers) CPVC stands for chlorinated polyvinyl chloride. This would infer that CPVC contains MORE chlorides than PVC. Combining moisture and heat through either of these materials is bound to create some leaching/ off-gassing of chlorides, especially given the fact that the condensate is designed to drain back to the boiler. So, having less chlorides, wouldn't PVC make a better (less damaging) venting material? (granting that it manufactures approved).
Just a thought,