NuTone 672R User Manual

1. Use 4" round duct.
2. Plan to run duct from discharge opening of fan to the

outside. For best fan performance, make the duct run as
short as possible and use a minimum number of elbows.

3. Use optional ducting accessories as required.

Plan to run 120vAC house wiring (with ground) from the

power source through a standard wall switch.

1. 

Remove blower/power unit assembly

from the housing.
(a) Unplug the power unit.
(b) Remove the screw (located next to plug-in receptacle)

which holds blower/power unit mounting plate in place.
Do not misplace this screw.

(c) Lift the mounting plate at the end near the plug-in

receptacle until blower wheel clears the scroll.

(d) Remove plate by pulling its tabs out of slots in the

housing. Set blower/power unit aside until needed.

2. Remove one of the wiring knockouts from housing.

1. Locate fan housing next to ceiling joist.
2. Using wood screws (not provided) loosely attach the

housing to ceiling joist through the keyhole slots in
mounting tabs.

3. Adjust housing so that it will be flush with the finished

ceiling. For the grille to fit properly, the housing’s rim  must
not extend beyond finished ceiling surface.

4. When housing is properly adjusted, tighten screws in slots.

1. Insert hanger bars in slots provided in housing.
2. Locate fan housing between joists so that the bottom of the

housing is even with the planned finished ceiling. Extend
the hanger bars to the joists.

3. Use screws or nails (not provided) to secure hanger bars to

ceiling joists.

1. 

Place duct collar over flanges at

discharge opening of fan. Secure collar by snapping tabs
into slots in flanges.

2. Run 4" round duct from outside to fan’s discharge opening.
3. Connect duct to fan’s duct collar.

1. Run 120vAC house wiring (with ground) from wall switch to

fan location.

2. Pull wire through access hole and into junction box.
3. 

Use approved wire nuts to connect

house supply wires to fixture as follows: white to white;
black to black. Connect green or bare ground wire to green
ground lead.