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Grand River Supply
• 1421 Camino Del Pueblo • Bernalillo, NM 87004 • Phone 505-867-4110
GrandRiverSupply.com
2. C
hImney
C
haSe
The Chmney Chase s the area made avalable n the buldng
framng for the Double Wall Chmney Ppe to go out through
the roof. The vews n the llustratons used here are lookng
up at the celng n the corner where the Kva Freplace Kt wll
be nstalled.
The mnmum dmensons of the Chmney Chase s
determned by the method of Ar Intake System ventng used,
Outsde Wall Ventng or Chmney Chase Ventng.
Outsde Wall Ventng wll requre that the nsde of the
Chmney Chase measure a mnmum of ” x ”, as shown
n
figure 2 - Chimney Chase without Vent
. Ar Intake System
ventng detals wll be dscussed later.
Chmney Chase Ventng wll requre that the nsde of the
Chmney Chase measure a mnmum of ” x 2”. The longer
dmenson provdes space for the Ar Intake System as shown
n
figure 3 - Chimney Chase Venting.
Fre blockng s requred between josts n whch the Double
Wall Chmney Ppe wll be nstalled as shown n
figure 4 - Roof
Joist Fire Blocking
.
Be.sure.to.adhere.to.your.local.building.
codes .
A hole wth a ” mnmum dameter should be cut nto
plywood or other approprate materal that s a mnmum of
½” thck and used to cap the Chmney Chase as shown n
figure 5 - Chimney Chase Cap
.
remember,.there.can.be.no.combustible.material.within.
2”.of.the.double.wall.chimney.pipe
.
Figure 3 - Chimney Chase Venting
Figure 2 - Chimney Chase without Vent
noTe:
If an obstruction is encountered within the space required
for the Chimney Chase it must be removed or cut as your local
building code allows. Do Not simply cut floor and ceiling joists,
they are almost always structural, as are roof rafters and trusses.
Check before cutting!
Figure 4 - Roof Joist Fire Blocking
Figure 5 - Chimney Chase Cap