Isokern IBV-36 - Page 20

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Venting Installation (cont.)
The IBV, per ANSI-Z21.50 standard, requires double wall, gas only B-
Vent metal piping for the purpose of venting the appliance to the outside
of the building.
Specications:
Gas code requirements concerning B-Type vent installations may
vary within state, province or local code jurisdictions. Therefore it is
recommended that you check with local building codes prior to installing
anyBVentpipingforspecicrequirementsor,intheabsenceoflocal
codes follow Section 7.0 of the current National Fuel Gas Code ANSI
Z223.1, NFPA 54.
1. The IBV must be vented vertically out the top of the unit.
2.AllBVentueusedwithIBVmustterminateverticallythroughthe
roof.
3.All BVent ueused withIBVmaynot beterminatedinto anattic
space.
4.TheBVentueusedwithIBVmustonlybeusedfortheIBVandnot
shared with other venting systems.
5. Maintain a minimum one inch (1”) air space at all double wall B-Vent
metal pipe components.
6. Maintain a minimum two inch (2”) air space at all single wall B-Vent
metal pipe components.
Note: Check with pipe manufacturer for specic clearance
requirements.
7. Maintain a minimum three inch (3”) air space to all insulation and
vapor barriers.
8. Minimum required chimney height is one hundred inches (100”).
(Figure 21)
9.Maximumchimneyoffsetangleisfortyvedegreesoffofvertical.
(Figure 21)
11. Only one offset per chimney system is allowed.
CAUTION:Donotmodifyoraltermetalueormetaluecomponents
as this could result in an unsafe and potentially dangerous installation
that may cause a serious injury. Consult B-Vent manufacturer.
100” minimum
45º
maximum
angle
Figure 21