Chimney
Thechimneyisthedrivingforcewhichmakesthestovefunction.Inorderforthestoveto
performsatisfactorilythechimneyheightmustbesufficienttoensurethecorrectdraught
of14to18Pa,soastocleartheproductsofcombustionandpreventprobl emsofsmoke
leakingintotheroomwhenthestoveisli t.
Note:Achimneyheightofnotlessthan4.5metres,measuredverticallyfromtheoutletof
thestovetothetopofthechimney,shouldbesatisfactory.
AlternativelythecalculationproceduregiveninBS5854:1980maybeusedasthebasis
fordecidingwhetheraparticularchimneydesignwillprovidesufficientdraught.
Theoutletfromthechimneyshouldbeabovetheroofofthebuildinginaccordancewith
theprovisionsoftheBuildingRegulati onsApprovedDocumentJ.
Iftheinstallationisintoanexistingchimney,thenitmustbesoundandhavenocracksor
otherfaultswhichmayallowfumesintothehouse.Olderproperties,especially,mayhave
chimneyfaultsorthecrosssectionmaybetool argei.e.morethan230x230mm.
Remedialactionshouldbetakenifrequire d,expertadviceshouldbesoughtwhere
required.
Ifthechimneyrequireslining,thenasuitablesolidfuelfluelinermustbeused,in
accordancewithBuildingRegulationsApprovedDocumentJ.
Anyexistingchimneymustbeclearofobstructio nandshouldhavebeensweptclea n
immediatelybeforetheinstallationofthestove.Ifthestoveisfittedinplaceofanopen
fire,thenthechimneyshouldbesweptonemonthafterinstallationtoclearanysootfalls
whichmayhaveoccurredduetothedifferenceincombustionbetweenthestovean dthe
openfire.
Ifthereisnoexistingchimneytheneitheraprefabricatedblockchimney,inaccordance
withBuildingRegulationsApprovedDocumentJoratwinwallinsul atedstainlesssteel
fluetoBS4543canbeused.Thesechimneysmustbefittedinaccordancewiththe
manufacturer’sinstructionsandtheBuildingRegulations.
Asinglewallmetalfluepipeissuitableforconnectingthestovetothechimneybutis
notsuitableforusingforthecompletechimney.Thechimneyand
connectingfluepipemusthaveaminimumdi ameterof150mmandit’s
dimensionshouldbenotlessthanthesizeoftheoutletsocketofthestovew hichis
150mm.Anybendinthechimneyorconnectingfluepipeshouldnotexceed45°.90°
bendsshouldnotbeused.
Combustiblematerialshouldnotbelocatedwheretheheatdissipatingthroughthe
wallsoffireplacesorfluescouldigniteit.Thereforewheninstallingthestoveinthe
presenceofcombustiblematerialsdueaccountmustbetakenoftheguidanceonthe
separationofcombustiblematerialgiveninBuildingRegulationsApprovedDocument
Jandalsointhes estoveinstructions.