Ancona B328D - Ducting and Venting Best Practices

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IMPORTANT:
• A minimum of 6 in. (15.3 cm) round or 3-1/4 x 10 in. (8.3 cm
x 25.4 cm) rectangular duct (purchased separately) must be
used to maintain maximum airflow efficiency.
• Alwaysuserigidtypemetal/aluminumductsifavailableto
maximizeairflowwhenconnectingtoprovidedduct.
• PleaseuseDuctRunCalculationbelowtocompute
total available duct run when using elbows, transitions
and caps.
• ALWAYS,whenpossible,reducethenumberor
transitions and turns. If long duct run is required,
increaseductsizefrom6in.(15.3cm)to7in.(17.7
cm) or 8 in. (20.3 cm). If a reducer is used, install a
long reducer instead of a pancake reducer. Reducing
ductsizewillrestrictairflowanddecreaseairflow,thus
reduceductsizeasfarawayfromopeningaspossible.
• Ifturnsortransitionsarerequired,installasfaraway
from opening and as far apart, between two (2), as
possible.
• Minimummountheightbetweenstovetoptohood
bottom should be no less than 24-inch (61 cm) for
electric cook tops and minimum of 30-inch (76.2 cm)
for gas stove tops and no higher than 30-inch (76.2 cm)
for electric cook tops.
• Itisimportanttoinstallthehoodatthepropermounting
height. Hoods mounted too low could result in heat
damageandfirehazard;whilehoodsmountedtoohigh
may be hard to reach and will lose its performance and
efficiency.
• Ifavailable,alsorefertostovetopmanufacturer’s
height clearance requirements and recommended
hood mounting height above range.
Installation
• This range hood is factory set for venting through the roof or wall.
• Ventworkcanterminateeitherthroughtherooforwall.Toventthroughawall,a90°elbowisneeded.
IMPORTANT:
• NEVER exhaust air or terminate duct work into spaces between walls, crawl spaces, ceiling, attics or
garages. All exhaust must be ducted to the outside.
• Use metal/aluminum duct work only.
• Fasten all connections with sheet metal screws and tape all joints with certied Silver Tape or Duct Tape.
• Use caulking to seal exterior wall or roof opening around the cap.
TOP VENTING ROOF EXHAUSTTOP VENTING WALL EXHAUST
Side wall
cap
Roof cap
Duct Run
Calculation
example:
One roof cap, two
90º elbows, and
one 45º elbow use.
0ft + 9ft + 9ft + 5ft
= 23ft used.
Deduct 23ft from
30ft, 7ft maximum
available for
straight duct run.