www.pmmag.com/articles/98507-us-boiler-approves-use-of-polypro-venting-systems
US Boiler approves use of PolyPro venting systems
November 19, 2012
M&G DuraVent received another approval for PolyPro venting systems
- US Boiler Co. has now approved PolyPro single-wall, concentric and flex for its
Burnham Alpine models 080-500. PolyPro is an engineered system
specifically designed for venting heating appliances. Click here
for a complete list of approvals.