DuraVent FasNSeal W2 Double-Wall - Manual (Page 5)

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appliances are designed for multiple venting.
Cat. II, III or IV appliances may not be common
vented with Cat. I, natural draft appliances.
• FasNSeal W2 must not come in contact with
plumbing or electrical systems.
• Maintain rated clearances to combustibles
over the entire length of the vent system.
• except for installation in one or two family
dwellings, a vent system that extends through
any zone above that on which the connected
appliance is located, shall be provided with
an enclosure having a fire resistance rating
equal to or greater than that of the floor or roof
assemblies through which it passes.
• Never install FasNSeal W2 on an appliance
that is not listed for use with a Special Gas
Vent or type BH vent.
• FasNSeal W2 shall not be routed into,
through, or within any vent, such as an existing
masonry or factory-built chimney, that is
connected to another appliance.
• Do not install insulation in any required
clearance space around FasNSeal W2.
Note: Follow appliance manufacturer’s
allowances for elbows.
VENT SIZE AND LENGTH
Refer to the appliance manufacturer’s
installation instructions for proper size and
vent configuration. Follow any horizontal/
vertical length and height limitations, minimum
clearances (air space) to combustibles, or
specifications for the use of elbows, tees, or
Drain tees.
FASNSEAL W2 ADJUSTABLE
VENT LENGTH
the W2-aVL adjustable Vent Length is
available in all diameters and allows the
installer to easily adjust the vertical or
horizontal length of a vent system. Cutting, or
piecing together several vent lengths can be
avoided.
the W2-Wt Wall thimble already incorporates
the W2-aVL. In most system layouts, this
provides enough adjustability for the horizontal
vent run.
Use the W2-aVL vertically for easy adjustment
of the required minimum 1/4” per foot pitch.
technical details about the stand alone W2-aVL:
the overall length of all FSaVL adjustable Vent
Length is 18” (1).
A
B
2.00”
(2)
W2 Vent
Length
W2- AVL
4.00”
Penetration
(3)
18.00”
Overall
Length
(1)
12.00”
Adjustability
(4)