FasNSeal W2 Special Gas Vent System for Category II, III & IV Heating Appliances

Sets the standard yet again as the first AL29-4C Double Wall Vent System with a built-in gasket, a mechanical locking band and featuring a full " air space for superior performance. Available in 3" through 24" diameters, Commercial and Industrial.

FasNSeal®W2 System is FULLY INTERCHANGEABLE with our FasNSeal® Single-wall System

Material Selection and Design AL29-4C Technical Data Sheet Material Thickness Clearance to Combustibles Built for Performance Underwriters Laboratories Double Wall Applications Built in Gaskets and Locking Band Adjustable Vent Length Engineering Services Warranty		See the Complete FasNSeal Catalog (PDF) Find a Distributor Near You

Material Selection & Design

The FasNSeal®W2 Double Wall Special Gas Vent System is manufactured under the most stringent quality control measures utilizing the latest production technology and know-how. FasNSeal®W2 is ideally suited for exhausting high efficiency; natural gas or propane fired heating equipment, where low flue gas temperatures can result in significant condensate formation within the vent system.

The flue gas conduit (inner tube) is made from AL29-4C or 29-4 (S44735), a superferritic stainless steel designed for extreme resistance to chloride ion pitting, crevice corrosion and stress corrosion cracking, as well as general corrosion in oxidizing and moderately reducing environments. AL29-4C is an ideal choice for resisting deleterious effects of corrosive condensates created by partially or fully condensing natural gas and propane fired heating appliances. The Canadian Gas Research Institute confirmed that test results proved AL29-4C to be one of two "most corrosion resistant alloys of twenty candidate stainless steels evaluated for resistance to chloride-induced corrosion in condensing and partially condensing gas-fired appliances". AL29-4C is a registered trademark of Allegheny Ludlum Corp.

Material Thickness - Inner Wall

Material Thickness - Outer Wall

The Jacket (outer tube) is manufactured from type 304 or type 430 stainless steel to provide long lasting performance and stability inside a building or when exposed to the outdoors.

The Air space between the flue gas conduit and jacket is .5 inches, providing close clearances to combustibles, reasonable outside dimensions and an additional heat shield or margin of safety where needed.

FasNSeal®W2 has been tested and is listed by Underwriters Laboratories, Inc. to UL 1738 and ULC-S636-95 safety standards. When installed according to ProTech Systems installation instructions, FasNSeal®W2 meets all test requirements for horizontal and vertical; interior or exterior installation.

Clearances to Combustables

FasNSeal®W2 Is Built For Performance Proven in our single wall system since 1997, all FasNSeal® products feature a smooth weld seam inside and out that is completely shielded during the TIG welding process. Contamination or molecular changes in the weld seam are avoided; no fillers are used in the welding process. Tube ends are formed under the most stringent quality standards to guarantee a perfect fit every time and to avoid built-in stress points or weak areas.

FasNSeal®W2 Applications

FasNSeal®W2 is a Special Gas Vent and Gas Vent Connector, designed for use on natural gas or propane-fired appliances listed as Category II, III and IV or in Canada Type BH Gas Vent Systems having a maximum operating temperature of 480 degrees F and maximum rated positive pressure of 6" water column (tested at 15" water column! ). FasNSeal®W2 provides venting for high efficiency gas boilers, furnaces, booster heaters, pool heaters, water heaters, unit heaters or tankless water heaters and is available in 3" -10", 12", 14" and 16" nominal flue gas conduit diameters. FasNSeal®W2 may also be used as a vent for Category I, natural gas or propane-fired heaters. (See installation instructions for details). FasNSeal®W2 must be sized according to the heating appliance manufacturers instructions, NFPA 211, NFPA 54, The National Fuel Gas Code ANSI Z223.1 and any other relevant local building codes and regulations (see installation instructions for details!).

FasNSeal® W2 Features Built-in Gaskets and Mechanical Locking Bands The flue gas conduit of every vent length and component (inner tube) features a built-in gasket in its female-end to seal each joint. An integrated mechanical locking band is factory-built into the jacket (outer tube) of each vent length and component (Pat #6,026,803 additional. Patents pending). FasNSeal®W2 parts are simply pushed together until fully seated. This renders the joints air and water- tight. By tightening their integrated mechanical locking band, parts are fastened together in seconds. FasNSeal®W2 can be taken apart and reassembled in minutes, making inspection, maintenance or re-routing of FasNSeal®W2 systems a breeze.

Adjustable Vent Lengths

featured in our Wall Thimbles allow for built-in horizontal adjustability without the need for cutting pipe. Our standard Adjustable Vent Length allows 4" to 12" of vertical adjustment, making pitching FasNSeal®W2 to properly drain condensate simple. Connecting FasNSeal®W2 to a heater is done efficiently with one of our many Adaptors approved by heating appliance manufacturers. Heating equipment can be fired up immediately upon completing a FasNSeal®W2 installation, as no cure time or cleanup is required. PTS listened to the installer and came up with the perfect way to join FasNSeal® parts. No cutting, no exterior clamps, no joints to wipe with alcohol, no rings, no tabs, no mess to clean.

Engineering Services

For FasNSeal® Single Wall and Double Wall Submittal Drawings and Bill of Material Submit your specifications on a submittal request work sheet along with your layout and PTS will supply comprehensive submittal drawings and a complete bill of materials within 48 business hours. Unless your specs are changed more than once, this service is provided free of charge. Fax request to (518) 462.1201 or email sales@duravent.com

Design Services for Heating Appliance OEM's

Submit your drawings and sketches for a custom designed female FasNSeal® Adapter for the breach of your heating appliance, Appliance Adapter or custom components (Tees, Elbows, Vent Lengths, etc.). Fax request to 518.462.1201 or email sales@duravent.com