Best Old Style Bathroom Exhaust Fans for Modern Homes
Old style bathroom exhaust fans remain a common choice for affordable, straightforward ventilation. This guide highlights reliable motor replacement options and kits that fit classic Nu-Tone, Broan, Uppco, and similar units, helping you restore quiet, effective air flow. Each product below includes a quick-fit summary and key specs to compare side-by-side.
The table summarizes five well-matched options for popular older systems. Use it as a quick reference when deciding which kit best fits your existing fan model.
| Product | Brand | Key Fit Notes |
|---|---|---|
| Siasky Universal Bathroom Vent Exhaust Fan Motor Replacement Kit | Siasky | Fits Nu-Tone Br-oan style fans; 50 CFM; 120V; quiet operation |
| SM550 Universal Bathroom Vent Exhaust Fan Motor Replacement Kit | FRIGESWIFT | Replaces multiple models (SM550/EM550/EM750 etc.); 50 CFM; 120V; CCW/CW |
| Broan-NuTone RE70BN Replacement Motor Kit | Broan-NuTone | 70 CFM replacement for select models; quick DIY install |
| BOJACK Bathroom Vent Exhaust Fan Motor Replacement | BOJACK | 50 CFM; UL certified; 120V; straightforward swap |
| Holdly V2262-50 7 Inch Exhaust Fan | Holdly | 7 round duct; 50 CFM; compact, suitable for smaller spaces |
Siasky Universal Motor Replacement Kit
The Siasky kit provides a 120V motor with a 50 CFM rating and a 60Hz supply. It uses a precision-balanced 5/8 coil pack and aerodynamic blades to keep noise under 1.5 sones, supporting quiet operation in older bathroom layouts. Key dimensions include a 3/16 shaft and 1 3/4 shaft length, with a 6 wire length and two-prong plug. Center mounting stud is 1 7/8 and the fan blades measure 4 5/8 x 1 1/8. This model notes compatibility with Nu-Tone Br-oan, Uppco, Bay motors, Sears 569, Dayton, and related brands for replacement use. Use when restoring a classic Nu-Tone/Broan style unit that matches these specs.
FRIGESWIFT SM550 Universal Motor Kit
The SM550 motor kit is designed for 50 CFM exhaust fans at 120V, 60Hz, and 0.29A, producing up to 3000 RPM. It’s reversible (CCW and CW) and uses a 4 1/2 blade diameter with a 1 blade height. Shaft dimensions are 3/16 x 1 3/4 and the wire length is 6. Mounting studs are spaced 1 7/8 on center with a 5/8 coil stack. It replaces many models including SM550, EM550, EM750, and VFM100, and is compatible with Nutone Broan and several other common brands bridging older and newer hardware. Verify your original part number for compatibility before purchasing.
Broan-NuTone RE70BN Replacement Motor Kit
This kit targets 70 CFM Broan-NuTone fans and can also improve performance for 50 CFM units by delivering up to 40% more power in certain models. It operates at approximately 6.0 sones and is designed for simple DIY installation, requiring no wiring or drywall cutting. Installation can be completed in around 10 minutes, depending on the existing setup. The kit is a direct motor replacement for select Broan-NuTone models, enabling quick refreshes for older bathrooms without extensive renovations.
BOJACK 50CFM Replacement Motor
BOJACK offers a straightforward 50 CFM motor replacement suitable for NuTone/Broan Uppco configurations. The unit runs at 120V with a 60 Hz frequency and draws about 0.65 amps. The shaft length is 1.75 and 3/16 in diameter, with a 6 wire length and a two-prong plug. It has UL certification, signaling compliance with safety and durability standards for residential ventilation. This option is appropriate for standard, compact bathroom fans where minimal wiring changes are preferred.
Holdly V2262-50 7 Inch Exhaust Fan
The Holdly V2262-50 is a 7-inch diameter ceiling exhaust fan designed for smaller spaces, delivering about 50 CFM with a claimed noise level near 1.0 sones in practice. It is configured for a standard 8-inch rough-in opening and comes with a motor duct extension of 6.5 inches. Its quiet operation and compact form factor make it a good match for powder rooms or compact bathrooms where a full-size, high-CFM unit would be excessive.
Broan-Nutone 50 CFM Modern Grille
This 50 CFM Broan-NuTone option emphasizes efficient airflow with Energy Star benefits and a quiet operation at about 2.0 sones. It features an easy install with foldable mounting brackets and claims no attic access necessary for installation. Housing measures 7-1/4 by 7-1/2 by 3-5/8 inches, with grille dimensions of 8-5/8 by 8-3/8 inches and a 3-inch duct. It’s well-suited for upgrading older fans while maintaining a compact footprint and preserving exterior aesthetics.
Buying Guide: Key Purchase Considerations
- Compatibility: Match the motor’s CFM rating, voltage (120V in all listed products), shaft size, and mounting pattern to your existing unit. Inaccurate fits can lead to noisy operation or poor ventilation.
- CFM and Sones: Higher CFM delivers stronger airflow but may be louder. For compact bathrooms, 50 CFM with low sone ratings (about 1.0–2.0) is often optimal.
- Wiring and installation: Some kits offer plug-and-play, reducing electrical work. Others require wiring; choose based on your comfort and local codes.
- Brand compatibility: Brands like Nu-Tone, Broan, Uppco, and Sears have legacy models. Replacements often list multiple compatible models—verify against your original part number.
- Durability and certification: UL or equivalent certifications indicate adherence to safety standards, especially important for retrofit projects.
- Physical dimensions: Check shaft length, blade diameter, and overall housing size to ensure the replacement fits within the ceiling cavity and ductwork.
- Noise and vibration: Look for precision-balanced motors and well-designed blades to minimize noise. This is crucial in shared living spaces where quiet operation matters.
In choosing a replacement, weigh the balance between ease of installation, compatibility with your current housing, and the long-term performance of the motor kit. For older homes with Nu-Tone or Broan systems, universal SM550 and similar replacements often provide broad compatibility while preserving original airflow characteristics.