NuTone 671R User manual

Architectural & Engineering Specifications
March 2004
Bathroom
Exhaust Fans
MODELS: 671R & 672R
DESCRIPTION
• Designed for large baths, utility rooms or laundry rooms.
• Model 671R: For baths up to 85 sq. ft.; other rooms
up to 110 sq. ft.
Model 672R: For baths up to 105 sq. ft.; other rooms
up to 135 sq. ft.
• Attractive Polymeric Grille fastens easily with
torsion springs.
• Motor quietly drives electronically balanced polypropylene
blower wheel.
• Prewired outlet box; plug-in receptacle.
• Quiet plastic backdraft damper operates automatically.
• Refer to NuTone's catalog for a complete line of accessories to
effectively adapt this Exhaust Fan
to your construction requirements.
DESIGN FEATURES
Air Delivery: Model 671R: 90 CFM at 0.10" S.P.
Model 672R: 110 CFM at 0.10" S.P.
Sound Level: Model 671R: 3.0 Sones.
Model 672R: 4.0 Sones.
Dimensions: Housing: 9" x 9" x 53⁄4" deep.
Grille: 101⁄2" x 101⁄4" x 9⁄16".
Material & Finish: Housing: Cold rolled steel, galvanized.
Grille: White polymeric.
Motor: Fully encased, plug-in, thermally
protected, 115vAC, 60 Hz.
Model 671R: 0.8 Amp.
Model 672R: 1.2 Amp.
Blower Wheel: Polypropylene.
Duct Size: 4" diameter.
INSTALLATION
• Unit is designed for ceiling installation and attaches to joists or
header between joists with slotted mounting bracket.
• Connects to 4" round duct.
• Grille installs with torsion springs and adjusts to ceiling
thickness.
• Switch must be purchased separately. Refer to NuTone's
catalog.
• Installation Instructions included with each unit.
ARCHITECT'S SPECIFICATIONS
Exhaust Fan(s) shall be Model Number 671R or
Model Number 672R as manufactured by NuTone
according to listed specifications.
Model 671R shall ventilate 90 CFM (45 L/s) at 0.10" S.P. at a
sound level or 2.5 Sones.
Model 672R shall ventilate 110 CFM (52 L/s) at 0.10" S.P. at
a sound level of 4.0 Sones.
The housing of either unit shall measure 9" x 9" x 53⁄4" deep
and connect to 4" round duct.
TYPICAL INSTALLATION
4" DIAMETER DUCT
ROOF CAP
90° ELBOW
WALL CAP
REFERENCE QTY. REMARKS Project
Location
Architect
Engineer
Contractor
Submitted by Date

CERTIFIED TEST DATA
HVI-2100 CERTIFIED RATINGS comply with new
testing technologies and procedures prescribed by the
Home Ventilating Institute, for off-the-shelf products, as
they are available to consumers. Product performance is
rated at 0.1 in. static pressure, based on tests conducted in
AMCA's state-of-the-art test laboratory. Sones are a
measure of humanly-perceived loudness, based on
laboratory measurements. This NuTone model is listed by
Underwriters' Laboratories Inc. and certified by the
Canadian Standards Association.
The air delivery of a ventilating system may be
determined by:
1. Determine the equivalent duct length for each 90 degree
elbow by adding one foot of duct length for each inch of
duct diameter, i.e., a 4 inch diameter duct elbow equals
4 feet equivalent duct length and an 8 inch diameter
duct elbow equals 8 feet equivalent duct length.
2. Add the total straight length of duct and the equivalent
length for each elbow to obtain the total equivalent duct
length.
3. Locate the intersection of the fan performance curve and
the total equivalent duct length curves and draw a
vertical line down to the CFM scale and read the system
air performance.
(NOTE: 3
1
⁄ 4
" x 10" duct equals 6 inch diameter duct.)
10 050
0
0.00
0.10
0.20
0.30
0.40
0.50
STATIC PRESSURE–INCHES OF WATER
50 Feet
40 Feet
30 Feet
20 Feet
10 Feet
CFM CUBIC FEET PER MINUTE
75 12525
AIR PERFORMANCE CURVE – MODEL 671R
(4 In. Duct to 10 Foot Lengths)
STATIC PRESSURE
INCHES OF WATER
CFM
0.05
91 90 87 85 82 78 67 62 –
0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45
10 050
0
0.00
0.10
0.20
0.30
0.40
0.50
STATIC PRESSURE–INCHES OF WATER
50 Feet
40 Feet
30 Feet
20 Feet
10 Feet
CFM CUBIC FEET PER MINUTE
75 12525
AIR PERFORMANCE CURVE – MODEL 672R
(4 In. Duct to 10 Foot Lengths)
STATIC PRESSURE
INCHES OF WATER
CFM
0.05
119 115 111 106 101 92 84 70 55
0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45
DIMENSIONS
9"
9"
DUCT
COLLAR
53⁄4"
POWER/BLOWER
ASSEMBLY
GRILLE
HOUSING
10
1
⁄ 4
" 10
1
⁄ 2 "
9
⁄ 16
"
Product specifications subject to change without notice.
NuTone, Inc., 4820 Red Bank Road, Cincinnati, Ohio 45227
Broan-NuTone Canada, Inc., 1140 Tristar Drive, Mississauga, Ontario, Canada L5T 1H9
Printed in U.S.A.