INSTALLATION
MOUNTINGHEIGHTS
9B"
36,,
Minimummountingheightbetweenrangetop
tohoodbottomsh_ld benolessthan24",
Maximummountingheightshouldbenohigh-
erthan32".
itisimportanttoinstallthehoodatthe
propermountingheight.Hoodsmountedtoo
lowcouldresultinheatdamageandfire
hazard',whilehoodsmountedtoohighwillbe
hardtoreachandwillloseperformanceand
efficiency.
if available,alsorefertorangemanufacturer's
heightclearancerequirementsandrecom-
mendedhoodmountingheightaboverange.
DUCTING
Aminimumof6"roundor3-1/4"x10"rectangular
ductmustbeusedtomaintainmaximumairflow
efficiency.
Alwaysuserigid-type metalductsonly.
Flexibleductscouldrestrict air flow byupto50%,
Alsousecalculation(onright) tocomputetotal
availableductrunwhenusingelbows,transitions
andcaps.
ALWAYS,whenpossible,reducethenumberof
transitionsandturns.If longductrunisrequired,
increaseductsizefrom6"to 7or8".Ifa reducer
isused,installa longreducerinsteadofapancake
reducer.Reduceductsizeasfarawayfromopen-
ingaspossible.
if turnsortransitionsarerequired:
Installasfarawayfromopeningandasfar
apart,between2,aspossible.
DuctRunCalculation:
Maximumrun
6"or3-1/4"x 10" duct
IOOR"
Deduct:
each90Elbowused 15 FT
each45elbowused 9 FT
each5"to3/14 x10"
transitionused 1 FT
each3/14xlO"to 6"
each3/14x10"to 6"
_ansitionused 5 FT
SideVial]Capw/damper 30FT
RoofCap 30FT
_- I mofcap,2xgOelbows,145elbowused:
=30'÷30'÷ 9' =69'used,31"availableforstraightductruns.