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3-90-70745R16_08/13
If your masonry chimney has not been used for some time,
have it inspected by a qualified person (building inspector, fire
department personnel, etc.). If a listed or certified manufactured
chimney is to be used, make certain it is installed in accordance
with the manufacturer's instructions and all local and state codes.
(See Fig. F & G, note roof clearance.)
3.2 COmmON ChImNEY PrOblEmS
In order to have a proper operating solid fuel heating system,
the chimney must be capable of providing the draft required.
The minimum required draft is .06 inches w.c. (water column).
This must be measured using a draft gauge.
If the chimney cannot supply this constant draft, the unit will
not operate properly.
In some installations, a barometric draft regulator may be
used and properly adjusted to compensate for excessive draft.
rEASONS FOr INSuFFICIENT drAFT rEAdINgS:
A. Leaky Chimney - Air leaking in around a loose fitting
clean-out door, flue pipes not tight at the joints, improper
plug openings or defective masonry.
B. Chimney Improper Height - Chimney does not extend
through the roof high enough to promote sufficient draft or
causes a down drafting condition to take place. Chimney
should be 2 feet higher than anything 10 feet around it!
(See Fig. H)
C. Obstruction In The Chimney - Check prior to use by holding
a mirror in chimney clean-out door. This will give a view
of the chimney.
D. Trees or Other Topographical Barriers - Impeding the
chimney's operation or causing a down draft condition to
exist. This can also be caused by adjacent buildings or
the roof of the same structure where the chimney is not
high enough. (See Fig. H.)
NOTE: ThE ChImNEY ON ThE hOuSE IlluSTrATEd IS
TOO lOw. IT ShOuld bE rAISEd TO COmPENSATE
FOr drAFTS.
E. Chimney Size - Chimney is not properly sized to adequately
vent the appliance. It is either too small or too large.
F. Chimney Offsets - Chimneys with offsets should not be
used. They cause an
obstruction to draft
as well as a place for
debris to collect.
3.1 TYPES OF ChImNEYS
The chimney is one of the most important, yet most neglected
and misunderstood portion of any solid fuel burning installation.
We do not recommend that the stove be connected to a chimney
shared by other heating devices.
ThE STOvE muST bE CONNECTEd TO ITS OwN TIlE-
lINEd FluE. A mINImum FluE SIzE OF 8" X 8" IS
NECESSArY FOr PrOPEr OPErATION ANd APPrOvEd
FOr All FuElS.
NO OThEr APPlIANCES ShOuld bE vENTEd TO ThIS
FluE!
CAuTION: ThE ChImNEY muST bE A ClASS 'A' ChImNEY
IN gOOd OPErATIONAl CONdITION.
NOTE; ThE uSE OF AlumINum TYPE 'b' gAS vENT
FOr SOlId FuElS IS uNSAFE ANd PrOhIbITEd bY
ThE NATIONAl FIrE PrOTECTION ASSOCIATION COdE.
There are three types of Class "A" Chimneys:
A. Masonry with tile liner to include brick or stone. It must be
supported on grade level foundation.
B. Insulated Class "A" manufactured chimney, listed or certified
by a national test agency.
C. Triple Wall Metal Class "A" chimney, listed or certified by a
national test agency.
vENTINg
