Jetmaster 18f User Manual

11
Air Supply
Allresrequireasupplyofairtosupportcombustionandtoallowthechimneytodrawcorrectly.
Airstarvationwillresultinpooruedrawandsmokinessintheroom.
All installations will require a permanent dedicatedairsupplyforthereofatleast5.5cm2perkWofratedheat
outputover5kW.Thesizeofairsupplyductorductsrecommendedforeachreisshownintheinstallation
data table.
Anairsupplymayberequiredinhomeswhichhavehighlevelsofairtightnessevenifthereoutputis5kWor
less.
The Building Regulations Document J and L must be taken into account when providing ventilation for
there.
Newly constructed houses, especially those using double-glazing and employing modern draught control
techniques, will need careful planning of air entry.
Extractorsorfanswhenoperatedinthesameroomoradjoiningroomoftheremaycauseproblems.
If there is a fan or extractor tted in the property then allowance for additional air may be required. See
commissioning section.
If there is more than one appliance in the property then each appliance must be supplied with adequate
combustion air and ventilation so that all the appliances can operate simultaneously.
Air Supplied from Room
Bringairintotheroomclosetothere.Theidealpositionisjusttothesidesofthereplaceopeningasshown.
Itcanbesplitandbroughtupintwopositionsifrequired,oneeachsideofthereplaceopening.
Careful positioning of the vents is essential so that they are not liable to become blocked and cause cold
draughts.
Wherepossible,drawairfromtwowallsatrightanglesandducttoamixingchamberbeneaththeoorbefore
itenterstheroom.Thiswillreducetheinuenceofstrongwindsonthesupplyofair.Whereanexistingoor
is solid, vents may have to be provided through the walls in a manner, which achieves conditions as close as
possible to the above, perhaps, by the use of ducting or of false skirting.
Wherethereisasuspendedooroverawellventilatedunderoorspace,itmaybesufcientjusttosetventilation
openingsthroughtheoorboardsadjacenttothechimneybreast.Olderhouseswiththepossibilityofdraughts
enteringarounddoorsandwindowswillstillprotfromtheprovisionofaseparateairsupplyas,properlyplaced,
this will stop or reduce cold draughts.
DONOTsetaventilationgrilleinthehearthimmediatelyinfrontofthere.Thecoldairenteringtheroomwill
formacold‘curtain’infrontofthereandmaydestroythewarmairaroundtheroom.
DONOTplaceanairsupplyinletacrosstheroomfromthere.Thedraughtofcoldaircrossingtheroomwill
scourtheroomofwarmairandtheoverallheatingeffectoftherewillbereduced.
DO NOT set a ventilation grille in a position where they may become liable to blockage.
Wheretheoorissolid,ventsneedtobeprovidedthroughthewallsinamanner,whichachievesconditionsas
close as possible to the above, perhaps, by use of ducting or false skirting.
When bringing in the air supply consideration should be given to any regulations that would effect the position of
any ducting or ventilation grilles.
Air Supplied from External Source
The primary air can be taken from an external source from outside
the building.
Thereisaexiblesleevethatslidesovertheairinletpipeattached
to the rear of the stove. An air kit is available as an optional extra
to do this.
With this in place the exible pipe can be fed through the wall
oroortoanexternalairsource.Anopengrillemaybeattached
to the end of the exible pipe to stop debris from blocking the
pipe. Ensure that the grille does not restrict the air supply. The air
requirements are listed in the installation data table.

Jetmaster 18f Specifications

General

Brand	Jetmaster
Model	18f
Category	Stove
Language	English