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7.9Flue

NOTE:Duetothenatureoftheboileraplumeofwatervapourwillbedischargedfromtheflue.

Thisshouldbetakenintoaccountwhensitingtheflueterminal.

1.Thefollowingguidelinesindicatethegeneralrequirementsforsitingbalancedflueterminals.ForGBrecommendationsaregiveninBS5440Pt1.

ForIErecommendationsaregiveninthecurrenteditionofI.S.813"DomesticGasInstallations".

2.Iftheterminaldischargesontoapathwayorpassageway,checkthatcombustionproductswillnotcauseanuisanceandthattheterminalwillnotobstructthe

passageway.

3.Ifaterminalislessthan2metresaboveabalcony,abovegroundoraboveaflatrooftowhichpeoplehaveaccess,thenasuitableterminalguardmustbeprovided.

4.*Reductiontotheboundaryispossibledownto25mmbutthefluedeflectorkit(partno.5111068)mustbefitted.

IMPORTANT:

Undercarportswerecommendtheuseoftheplumedisplacementkit.

Theterminalpositionmustensurethesafeandnuisancefreedispersalofcombustion

products.

 TerminalPositionwithMinimumDistance(Fig.15) (mm)

Directlybelowanopening,airbrick,openingwindows,etc. 300

Aboveanopening,airbrick,openingwindowetc. 300

Horizontallytoanopening,airbrick,openingwindowetc. 300

Belowgutters,soilpipesordrainpipes. 25(75)

Beloweaves. 25(200)

Belowbalconiesorcarportroof. 25(200)

Fromaverticaldrainpipeorsoilpipe. 25(150)

Fromaninternalorexternalcorner. 25(300)

I Aboveground,rooforbalconylevel. 300

J Fromasurfaceorboundarylinefacingaterminal. 600

K Fromaterminalfacingaterminal(Horizontalflue). 1200

 Fromaterminalfacingaterminal(Verticalflue). 600

L Fromanopeningincarport(e.g.door,window)intothedwelling. 1200

M Verticallyfromaterminalonthesamewall. 1500

N Horizontallyfromaterminalonthesamewall. 300

R Fromadjacentwalltoflue(verticalonly). 300

S Fromanadjacentopeningwindow(verticalonly). 1000

T Adjacenttowindowsoropeningsonpitchedandflatroofs 600

U Belowwindowsoropeningsonpitchedroofs 2000

Inaddition,theterminalshouldbenonearerthan150mmtoanopeninginthebuildingfabricformedforthepurposeofaccommodatingabuiltinelementsuchasawindow

frame.

OnlyONE25mmclearanceisallowedperinstallation.IfoneofthedimensionsD,E,F,GorHis25mmthentheremainderMUSTbeasshowninbrackets,inaccordancewith

B.S.54401.

NOTE:Thedistancefromafanneddraughtapplianceterminalinstalledparalleltoaboundarymaynotbelessthan300mminaccordancewiththediagrambelow