FasNSeal 80/90 is a unique, patent pending system that exhausts 90+ condensing appliances with Type B atmospheric units within the same vent.
Using your pre-existing common vent, our cap improves the operation of both the remaining atmospheric appliances, and the new condensing unit, while not disturbing finished space during installation.
Finally a solution when you need to deal with narrow lot lines, clearance to window and door openings or when side wall venting just isn’t practical.
Applications
The FNS 80/90 system is a tested and listed exhaust vent for the replacement of one Category I gas fired appliance with a high efficiency appliance in an existing Type B common vent system.
Listings
DuraVent’s FNS 80/90 Combination Cat I and Cat IV gas vent system is designed and UL listed for use with approved Duravent / Security Chimneys special gas vent components only! Listed to applicable portions of ULC S636/UL1738, UL1777, and UL441.
Catalog:
- FasNSeal 80/90 Section (
PDF, 7.1MB) - DuraVent All Products Catalog (
PDF, 47.4MB)
Installation Instructions:
- FasNSeal 8090 Installation Instructions (PDF, 1.4MB )
Sales Sheets:
- FasNSeal 80/90 Sales Sheet (PDF, 707KB )
- FasNSeal Product Brochure (fold out/mailer) (
PDF,2.1MB )
Press Release:
- DuraVent Releases FasNSeal 80/90 at AHR EXPO (PDF, 91KB )
Bulletin:
- Navien FNS 80/90 Approval (PDF, 557KB)
- DuraVent now offers FasNSeal® 80/90 Kits (PDF, 175KB )