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A failing exhaust fan creates severe headaches in creative workspaces, home edit suites, and multi-use studios where humidity, stale air, and excessive motor vibration ruin the working environment. When bearings wear out or a blower wheel warps, the noise disrupts delicate audio recordings, while moisture buildup threatens sensitive electronics and camera gear. Replacing the entire ceiling exhaust fixture typically demands tearing down drywall, re-routing duct pipes, and handling complex ceiling rewiring. For studio operators, craft hobbyists, and practical DIY renovators, the NuTone 8663RP B Unit provides an isolated internal mechanical replacement that avoids structural ceiling demolition.
Our assessment indicates that this replacement assembly serves as an efficient, mechanically precise solution for spaces already anchored by an authentic Broan-NuTone housing can. By delivering the motor, blower wheel, and metal mounting base as an integrated sub-assembly, it converts an arduous contractor-level job into a straightforward mechanical maintenance task. If your structural chassis matches the designated series, this unit restores steady air circulation with minimal operational downtime.
Quick Verdict
The NuTone 8663RP B Unit motor assembly is a purpose-built internal replacement pack engineered to slide directly into existing NuTone fixtures without cutting ceiling plaster or adjusting exterior duct pathways.
- Features a factory-calibrated 8 15/16-inch square sheet metal plate engineered for slide-in latching.
- Equipped with a balanced 5.75-inch by 2-inch centrifugal blower wheel running at 1550 RPM.
- Includes a pre-wired two-prong 115-volt power plug designed for modular, tool-free connection.
- Functions as an identical cross-reference replacement for factory part numbers 97017705 and 97017706.
NuTone 8663RP B Unit Features Explained
Mounting Plate and Physical Housing Footprint
The core structural backbone of this assembly is its heavy-gauge steel mounting bracket, precisely stamped at 8 15/16 inches wide by 8 15/16 inches high (listed as 8.94 by 8.94 inches). This rigid metal plate serves as the functional divider between your ceiling plenum and the conditioned workspace below. Factory-shaped perimeter tabs engage directly with the internal tracks of the original ceiling fixture, meaning you do not have to drill new anchor points, realign exterior flues, or patch broken ceiling drywall during the refit process.
Maintaining precise dimensional tolerances is essential when swapping exhaust components, as even a quarter-inch variance can cause violent chassis vibration against ceiling joists. The dual mounting studs positioned on the motor end opposite the drive shaft keep the motor rigidly anchored to this bracket plate. Storing your tools in a secure modular system like the dewalt tool box tough system 2.0 ensures you have the necessary nut drivers and pliers close at hand when working overhead to lock this metal bracket firmly into the housing tracks.
1550 RPM Motor and Centrifugal Blower Wheel
Airflow generation is handled by a 3.3-inch diameter electric motor engineered for continuous indoor ventilation service. The motor features a 1 15/16-inch case depth and drives a 1/4-inch diameter by 1-inch long steel shaft. Operating at a calibrated velocity of 1550 RPM with counter-clockwise (CCW) rotation, the motor delivers the steady rotational torque needed to drive the attached squirrel-cage blower wheel without straining internal windings.
The 97017705 motor wheel assembly utilizes a pre-mounted blower wheel measuring 5.75 inches in diameter by 2 inches in depth. Because the wheel is balanced and seated at the factory, users avoid the common headache of manual fan alignment, which frequently causes rattling or rubbing against the scroll housing. The counter-clockwise rotational direction matches the curved scroll discharge chamber of the original housing, ensuring air moves cleanly outward through the exhaust duct rather than stalling inside the chassis.
Electrical Configuration and 2-Prong Plug Integration
Electrical service on the NuTone 8663RP B Unit is designed around a self-contained, modular interface. Rather than requiring users to twist wire nuts while balanced on a stepladder inside a cramped ceiling cavity, the unit integrates a pre-wired, two-prong plug rated for standard 115-volt residential branch circuits. The motor draws an operating current of 1.2 amps according to the listing title, while carrying a 1.9-amp nameplate specification rating, backed by a listed 115-watt power capacity.
This plug-in design significantly simplifies future maintenance workflows and workspace safety. When performing routine cleaning, clearing accumulated dust from the scroll wheel, or replacing secondary components, you simply pull the two-prong connector from the internal receptacle mounted inside the housing wall. It eliminates direct interaction with house wiring splices, reducing downtime and keeping electrical connections isolated and protected from moisture-heavy exhaust air.
Housing Compatibility and Part Number Interchangeability
A crucial technical detail of the broan nutone 8663rp assembly is its strict operational requirement: it is designed exclusively for use with Model 8663RP “A” Housing units. NuTone produced multiple revisions of their ceiling cans over different production eras, and the “A” housing features specific internal shelf tabs that correspond exactly to this 8 15/16-inch plate. Installing it into non-compatible cans will result in misaligned scroll positioning and poor air sealing.
For facility managers and creators cross-referencing repair manuals, the unit carries manufacturer part number 97017705, distributed by EAGLEGGO under model code CECOMINOD088831 with UPC 663001340782. The listing confirms that this assembly is identical in form, fit, and mechanical function to part number 97017706. If your existing unit matches either of these historical part references, this assembly serves as a drop-in replacement that preserves the original duct architecture without modification.
Specs
| Specification | Detail |
|---|---|
| Brand | Broan-NuTone |
| Manufacturer | EAGLEGGO |
| Part Numbers | 97017705 / 97017706 |
| Model Number | CECOMINOD088831 |
| Rotational Speed | 1550 RPM |
| Operating Voltage | 115 Volts |
| Current Rating | 1.2 Amps (Title) / 1.9 Amps (Nameplate Rating) |
| Power Rating | 115 Watts |
| Mounting Plate Dimensions | 8 15/16″ x 8 15/16″ (8.94″W x 8.94″H) |
| Blower Wheel Dimensions | 5.75″ Diameter x 2″ Height |
| Motor Dimensions | 3.3″ Diameter x 1 15/16″ Case Length |
| Shaft Dimensions | 1/4″ Diameter x 1″ Length |
| Rotation Direction | Counter-Clockwise (CCW) |
| Electrical Plug | 2-Prong 115-Volt Standard Plug |
| Housing Requirement | Model 8663RP “A” Housing Only |
| Warranty | 1-Year Manufacturer Warranty |
Figures quoted from the product listing. Nothing here was measured.
NuTone 8663RP B Unit Pros and Cons
Pros
- Direct drop-in fit for 8663RP A housings
- Pre-assembled 1550 RPM motor and blower wheel
- Simple 2-prong plug eliminates hardwire splicing
- Rigid 8 15/16-inch sheet metal mounting plate
- Backed by a one-year manufacturer warranty
Cons
- Restricted strictly to 8663RP A housing models
- Listing does not specify CFM or sone ratings
- Excludes exterior grille and light socket hardware
Best Use Cases
- Restoring continuous ventilation in podcasting spaces or home edit suites where a vibrating, degraded exhaust fan disrupts sensitive audio recording sessions.
- Replacing a seized 97017705 motor wheel assembly in residential or studio washrooms without cutting ceiling drywall or replacing existing exhaust ducting.
- Upgrading aging fan components in dedicated darkrooms or print labs where moisture and chemical vapor clearance are required to protect delicate media.
- Performing scheduled mechanical maintenance on legacy Broan-NuTone fixtures stamped specifically with the Model 8663RP “A” designation.
Before You Buy
Before purchasing this replacement assembly, you must physically verify the model designation stamped into your existing ceiling box. Remove your current grille and locate the metal identification label inside the steel enclosure; this unit is engineered exclusively for Model 8663RP “A” housing installations. If your housing is stamped as a “B” revision, a different numerical series, or an unbranded builder-grade box, the 8 15/16-inch plate will fail to latch into the internal tracks. While an ambient climate unit such as the garvee 8,000 btu portable air conditioner, 3-in-1 portable ac unit with remote control, cool, dehumi can manage overall room temperature and relative humidity, it cannot replace the localized moisture and vapor extraction provided by a dedicated exhaust fan.
Buyers should also be aware of what is omitted from the package. The product listing states that the replacement unit arrives as pictured: you receive the motor, blower wheel, sheet metal mounting plate, and integrated two-prong plug. It does not include an exterior plastic grille, light lens, reflector plate, duct collar, or ceiling housing can. Furthermore, the listing does not specify official CFM airflow output ratings or sone noise levels, so performance expectations should be matched strictly to the mechanical baseline of the original 1550 RPM factory configuration.
Bottom Line
Is the NuTone 8663RP B Unit worth the investment for your workspace setup? For creators and homeowners operating with an established 8663RP “A” ceiling chassis, the answer is unequivocally yes. It circumvents the costly, messy, and labor-intensive process of cutting open ceiling drywall, re-taping exhaust ductwork, and altering electrical runs. Instead, you gain an authentic-spec 1550 RPM motor and balanced blower wheel mounted on a rigid metal chassis that drops directly into your existing infrastructure.
Backed by a one-year manufacturer warranty, this drop-in replacement restores proper room ventilation, mitigates moisture hazards, and eliminates annoying mechanical bearing screeches. Provided you have confirmed your housing compatibility beforehand, this assembly delivers a fast, durable fix that keeps your studio workspace comfortable, clean, and mechanically reliable.
FAQ
Is the NuTone 8663RP B Unit compatible with all Broan-NuTone exhaust fans?
No. The manufacturer documentation specifies that this assembly is engineered strictly for the Model 8663RP “A” Housing. It does not fit “B” series housings, non-RP models, or differing brand cans, as the 8 15/16-inch square mounting plate requires specific matching retention tracks inside the ceiling enclosure.
What is the difference between part number 97017705 and 97017706?
The product description confirms that part number 97017705 is mechanically identical to part number 97017706. Both part numbers share the same 1550 RPM motor specifications, 8 15/16-inch bracket dimensions, 5.75-inch by 2-inch blower wheel, and two-prong plug configuration.
Does this replacement unit come with a new ceiling grille or light lens?
No. The unit arrives exactly as pictured on the listing, containing only the pre-assembled motor, centrifugal blower wheel, sheet metal bracket, and integrated wiring harness. You must reuse your existing ceiling grille, light reflector, and decorative trim, or purchase them separately.
What are the electrical requirements for this motor assembly?
The motor is rated for standard 115-volt residential circuits. The listing title states an operating draw of 1.2 amps, while the motor nameplate rating is specified at 1.9 amps and 115 watts. It connects via an attached two-prong plug designed for the internal outlet inside the housing.
In which direction does the blower wheel rotate?
The motor and blower wheel operate with counter-clockwise (CCW) rotation. This rotational direction is factory-calibrated to match the scroll contours of the 8663RP “A” housing, directing exhaust air smoothly toward the exterior duct connector.
