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1. Distance from cooking surface:
For optimal performance, the distance from the cooking
surface to the bottom of the range hood should be between
24" to 30", unless otherwise noted. DO NOT install a Broan
Elite range hood less than 24" above cooking surface.
To maintain hood performance at heights greater than the
recommended range, use the
following guidelines:
• For every 3" increase in
installation height, add
100 CFM to the minimum
exhaust requirement and/or
a minimum of 3" to the hood/
liner width (may require going
to the next hood width).
2. Range hood width:
The hood should never be less
than the width of the cooktop.
3. Required blower CFM based on cooktop BTU output.
• For cooktops UNDER 60,000 BTUs, choose a blower with
a minimum of 100 CFM per lineal foot of your cooktop
width. For example, a 36" wide cooktop requires a blower
with a minimum of 300 CFM.
• High heat cooking or aromatic foods may require additional
CFM. Always check with the range manufacturer. NOTE:
Increasing capture area by 3" on each side is also a
recommended way to address this issue.
• As a means to estimate the approximate CFM requirement
for cooktops OVER 60,000 BTUs, choose a blower with
1 CFM per 100 BTU of cooktop output. To quickly
calculate this number, add the BTU output from all
burners and drop the last two zeros. For example, if the
total BTU output of the cooktop burners is 65,000 BTUs,
choose a blower with at least 650 CFM.
4. Additional CFM needs for a Grill or Griddle:
If your cooktop has a grill or griddle, ADD 200 CFM to
your estimated CFM needs as calculated in step 3. For
example, if your cooktop BTU output requires a 650 CFM
blower, add 200 CFM for a total of 850 CFM.
Installation Example:
A consumer purchases a cooktop with these specifications:
• Four burner, 36" cooktop
• Burner output is 60,000 BTU
• The cooktop features a grill.
• Installation requirements call for the range hood to be
33" over the range (3" above recommended maximum
height)
Blower CFM Option 1: (Using the guidelines above)
The blower must equal a minimum of 600 CFM (60000
BTU) + 200 CFM (for Grill requirement) + 100 CFM
(for 3" of installation height) = 900 CFM
Blower CFM Option 2: (Using the guidelines above)
Select a range hood that is a minimum of 3" WIDER than
the cooktop, a minimum 600 CFM (60000
BTU) + 200
CFM (for Grill requirement) = 800 CFM
Internal, In-Line and Exterior blower specifications table
Installation and blower selection guidelines
MAX COOKTOP
MODEL MOUNTING CFM BTU HVI VOLTS AMPS ROUGH-IN DUCT
†
INLET/OUTLET DIRECTION MOTOR TYPE
RM325H Internal 600 70,000 Y 120 3.3 7" Round — V or H —
RM326H Internal 1200 120,000 Y 120 5.0 4
1
⁄2
" x 18
1
⁄2
"** — V or H —
P5 Internal 460V/500H 60,000 Y 120 1.8 3
1
⁄4
" x 10" — V or H —
P8 Internal 850V/900H 95,000 Y 120 3.4 3
1
⁄4
" x 14" — V or H —
331H
++
Exterior 600 60,000 Y 120 2.3 10" Round — — Single-Speed
332H
++
Exterior 900 90,000 Y 120 5.8 10" Round — — Single-Speed
335
++
Exterior 1200 120,000 Y 120 3.0 10" Round — — Single-Speed
336
+v
Exterior 1500 120,000 Y 120 3.8 10" Round — — Single-Speed
HLB3
++^
In-Line 280/260* 40,000 Y 120 2.6 — 8" or 10"/8" Round V or H Single-Speed
HLB6
++
In-Line 600/600* 65,000 Y 120 2.9 — 10"/10" Round V or H Single-Speed
HLB9
++
In-Line 800/700* 85,000 Y 120 3.0 — 10"/10" Round V or H Single-Speed
HLB11
++
In-Line 1100/1000* 110,000 Y 120 5.0 — 10"/10" Round V or H Single-Speed
++
Model 332KR Rough-In Kit required for installation with hood series RM60000, 64000 and RMIP
(Model 421 10" In-Line damper recommended for Exterior blowers).
** Transitions to 10" round available.
* Straight CFM/Right angled CFM (rated with transitions provided).
†
Transitions provided with unit.
^
Not recommended for use with grill applications.