Specifications



36 Solution3.4InstallationandOperationManual

Thetopofthefluesystemshouldbetallenoughtobeabovetheairturbulencecausedwhenwind

blowsagainstthehouseanditsroof.

Theflueexitshallbelocatedoutsidethebuildinginwhichtheapplianceisinstalledsothat:

a) Thefluepipeshallextendnotless

than4.6mabovethetopofthefloorprotector;

b) Theminimumheightofthefluesystemwithin 3m  distancefromthehighestpoint ofthe

roofshallbe600mmabovethatpoint;

c) Theminimumheightofthefluesystemfurtherthan3mfromthe

highestpointoftheroof

shallbe1000mmaboveroofpenetration;

d) Nopartofanybuildingliesinoraboveacirculararea describedbyahorizontalradiusof3

maboutthefluesystemexit.

8.4 THERELATIONSHIPBETWEENTHEFLUESYSTEMANDTHEHOUSE

Becausethefluesystemistheenginethatdrivesthewoodheatingsystem,itmusthavetheright

characteristics.Thesignsofbadsystemdesignarecolddowndraughtwhenthereisnofireinthe

wood fire, slow kindling of new fires, and smoke roll‐out when the door is opened for loading.

Therearetwoguidelinestofollow.First,thefluesystemshouldbeinstalledupthroughtheheated

spaceofthehouse,notoutandupanoutsidewall.Second,thefluesystemshouldpenetratethe

topofthebuildingatornearthehighestheatedspace.

8.4.1 WHYINSIDEFLUESYSTEMSAREPREFERRED

Fluesystemsthatrisestraightupfromthewoodfirefluecollarprovidethebestperformance.Flue

systemsthatriseinsidethewarmspaceofthehousetendtoprovideasmallamountofdrafteven

whenthereisnofireburning.Thismeansthatwhenyoulightafire,theinitialsmokegoesupthe

fluesystemandstrongdraft builds quickly asthefluesystemwarmsup. Flue systems thatexita

housewallandrunupoutsidecancauseproblems.



GoodSystemDesign

Insidefluesystemsarepreferredbecause

evenwhennofireisburning,thereis

normallyupwardflowinthesystem.

InferiorSystemDesign

Outsidefluesystemsareaproblembecausewhen

nofireburnstheywillgointocolddowndraughtif

thewoodfireisinstalledlow

inthehouse.