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

⁄

" x 10" duct equals 6 inch diameter duct.)

10 050

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

0.00

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

DUCT

COLLAR

53⁄4"

POWER/BLOWER

ASSEMBLY

GRILLE

HOUSING

⁄

" 10

⁄

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.

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