Installation Guide

Venting Height Requirements
BV-RH801 USER MANUAL
IMPORTANT:
1. Please use Duct Run Calculation below to compute total available
duct run when using elbows, transitions and caps.
2. ALWAYS, when possible, reduce the number or transitions and
turns. If long duct run is required, increase duct size from 6” to
7”, 8” or 9”. If a reducer is used, install a long reducer instead
of a pancake reducer. Reducing duct size will restrict airow and
decrease airow, thus reduce duct size as far away from opening as
possible.
3. If turns or transitions are required: Install as far away from opening
and as far apart, between 2, as possible.
4. Minimum mount height between stove top to hood bottom should
be no less than 24-inch.
5. Maximum mount height between stove top to hood bottom should
be no higher than 32-inch.
6. It is important to install the hood at the proper mounting height.
Hoods mounted too low could result in heat damage and re
hazard; while hoods mounted too high will be hard to reach and will
reduce its performance and efciency.
7. If available, also refer to stove top manufacturer’s height clearance
requirements and recommended hood mounting height above
range.
CALCULATION VENT SYSTEM LENGTH
To calculate the length of the system you need, deduct the equivalent feet for each vent piece used in the system from the recommended maxi-
mum duct run.
RECOMMENDED MAxIMUM STRAIGHT DUCT RUN
6” or 3-1/4 x 10” duct
VENT PIECE DEDUCTION
Each 90° elbow used
Each 45° elbow used
Each 6” to 3/12 x 10” transition used
Side wall cap with damper
Each 90° elbow used
50 ft
9 ft
5 ft
7 ft
0 ft
0 ft
DUCT RUN CALCULATION
DUCT RUN CALCULATION ExAMPLE:
One roof cap, two 90º elbow, and one 45º elbow used:
0ft + 9ft + 9ft + 5ft = 23ft used.
Deduct 23ft from 50ft, 27ft maximum available for the duct run.
MINIMUM DUCT SIZE:
1. Round - 6” minimum
2. Rectangular - 3-1/4 x 10” minimum (requires a 6” to 3-1/4x10” adaptor, not supplied)
7