POWER/BLOWER Unit Installation

1.Refer to Figure 1. Place power/blower unit into housing so that mounting plate's tabs insert into slots in housing.

2.Press other end of mounting plate down until it is firmly seated over scroll and plug-in receptacles.

3.Secure mounting plate to housing with provided screw.

4.Insert motor plug into junction box receptacle.

COMPLETING INSTALLATION

1.Insert lamp plug into junction box receptacle and secure reflector assembly to motor frame with wing nut provided.

2.Install lamps 100 watt (maximum) for light, and 7 watt (maximum) for night light (Night light not provided on 8664RP).

3.Squeezing the grille assembly's mounting springs together, insert springs into slots on both sides of housing.

4.Press grille assembly firmly into place against ceiling.

INSTALLATION IN EXISTING CONSTRUCTION

Locate fan between ceiling joists.

Plan ducting wiring before proceeding with installation. Refer to Figure 4 for wiring. CAUTION: Check area above planned location to be sure that:

1.Ducting can be installed.

2.Wiring can be run to the planned location.

3.No wiring or other obstruction might interfere with installation.

INSTALLATION FROM ACCESSIBLE AREA ABOVE

1.After determining desired location for fan, drill a small hole in the ceiling. Place a coat hanger or other stiff wire up through hole to help in locating from above.

2.Place fan housing on top of ceiling surface and use the housing as a template to mark area to be cut out. Cut round hole 131⁄8" in diameter for rough opening.

3.After cutting out opening, mount housing in the opening using the hanger bars provided.

A.Insert hanger bars in slots in housing.

B.Position housing in opening so that bottom of housing is flush with ceiling.

C.Use screws or nails (not provided) to secure hanger bars to ceiling joists.

4.Install ducting and wiring as described above.

INSTALLATION FROM AREA BELOW CEILING

Note: If you do not have access to the area above the installation location, make sure that the installation will not interfere with existing wiring, plumbing, etc. and that the wiring and ducting can be run to the desired location. It will be necessary to use flexible duct when installing the unit from below.

1.The fan must be mounted between ceiling joists. Decide where you want to locate the fan, and then determine where the nearest joists are.

Locating Joists – Lightly tap the ceiling. A hollow sound means no joist; a solid sound means a joist is present. To be sure you have located a joist, drill a small hole (1/16") and probe into the ceiling with a wire.

2.Locate the joists. Drill a starter hole in the ceiling between the joists.

3.To exactly locate the edge of joist, saw a line from hole to joist.

4.Refer to page 1. Remove power/blower unit from housing.

5.Use the housing pan as a template to mark cutout: place pan centered between joist and trace around pan.

6.Make cutout along outside of marked line.

7.Refer to Figure 5. Install 2 x 4 cleats to both ceiling joists. In some cases it may be necessary to use more than a single cleat on one side. The distance between cleats must be at least 91⁄8" but not more than 10".

8.Remove side wiring knockout and insert and secure an approved box connector into the wiring entrance hole.

9.Use pliers to bend both mounting tabs as flush as possible to the side of the housing.

10.Install duct collar.

11.String wiring through box connector and connect 4" flexible duct to duct collar.

12.Carefully push ductwork and wiring back into cutout. Place housing into cutout.

13.Use wood screws to secure housing to cleats through four holes in housing's pan. Make sure pan is flush to finished ceiling.

14.Install Power/Blower Unit and complete installation.

11-1/2"



5-3/4"

Cleat

	

	2"	
		4"
		4"
		

9-1/8"-10"

Joist

FIGURE 5

	4" Flexible
	Duct
		120vAC
		House Wiring
		Duct
	Mounting	Collar
	Mounting	Wiring
	Holes	Wiring
	Holes	Knockout
		Knockout
		Bend
		Mounting
		Tabs
		Flush To
		Side of
		Housing
		FIGURE 6

CLEANING AND RELAMPING

1. Pull grille assembly away from ceiling.

2. Squeezing the grille assembly's mounting springs together, remove grille assembly from housing to expose socket for relamping.

3. Clean grille and lens assembly using a mild soap and water solution. Assemblies with wood frames should not be immersed.

4. Replace grille assembly flat against ceiling after cleaning or relamping.

8663RP, 8673RP, 8664RP specifications

NuTone has long been a trusted name in home ventilation and exhaust fans, and their models 8664RP, 8663RP, and 8673RP continue to prove their reputation. These bathroom fans not only aim to remove moisture and odors but also enhance the overall ambiance of your space through innovative features and sleek designs.

The NuTone 8664RP model showcases a powerful 70 CFM airflow capability, making it suitable for standard-sized bathrooms. The fan is designed for easy installation and operates with an ultra-quiet 1.5 sones, ensuring that your relaxation isn't disturbed. One of the standout characteristics of the 8664RP is its combined ceiling light feature, providing bright illumination to your bathroom while efficiently ventilating the space.

Moving on to the NuTone 8663RP, this model elevates convenience. It is equipped with a 60-watt bulb for effective lighting, which can significantly enhance visibility in your grooming areas. The fan operates at 80 CFM and maintains a low noise level of 2.5 sones, balancing power and tranquility. The versatile design of the 8663RP fits seamlessly into various bathroom decors, ensuring that it remains unobtrusive yet functional.

Meanwhile, the NuTone 8673RP is a remarkable upgrade in terms of performance. Featuring a robust 90 CFM airflow, it's designed for larger bathrooms where effective moisture removal is crucial. This model operates at an impressively quiet 1.5 sones, making it perfect for maintaining a peaceful atmosphere. An additional highlight is the integrated nightlight feature, offering soft illumination for late-night trips to the bathroom without the harsh glare of overhead lights.

All three models boast a contemporary design, allowing them to blend seamlessly with modern bathroom aesthetics. They are also equipped with easy-to-clean grilles, which help maintain hygiene with minimal effort. Each unit comes with a built-in damper that prevents backdrafts, ensuring that unwanted odors stay out.

In conclusion, the NuTone 8664RP, 8663RP, and 8673RP models stand out due to their blend of efficiency, quiet operation, and stylish designs. Whether you're renovating your bathroom or simply looking to upgrade your ventilation, these models offer a fantastic balance of performance and functionality, solidifying NuTone's commitment to quality in home improvement products.