Answer: These replacement motor kits are designed for common 50 CFM bathroom exhaust fans and offer plug-and-play installs for quick upgrades. They are best for DIY homeowners and property managers seeking quieter operation and reliable airflow. Each option here targets a specific compatibility set, so choose based on your existing model and mounting specs.
Buyer’s overview: If you need a quiet, easy-to-install motor kit for Nu-Tone/Br-oan or similar brands, one of these universal replacements will fit. For attic or small bathroom upgrades, some kits deliver stronger airflow; for shared living spaces, noise level matters the most. The table below summarizes the five products featured in this guide.
| Product | Best For | Airflow (CFM) | Noise Note | Key Fit Notes |
|---|---|---|---|---|
| 50 | Quiet under 1.5 sones | |||
| 50 | Balanced operation | |||
| 50 | Under 1.5 sones | |||
| 50 | Less than 1.8 sones | |||
| 50 | Reversible airflow option |
Siasky Universal Fan Motor Kit
Product overview: 120V with power plug, 50 CFM, 0.6A, 3000 RPM, 60Hz. The kit uses a precision-balanced 5/8 coil pack and aerodynamic blades to keep noise below 1.5 sones. The motor shaft measures 3/16″ x 1 3/4″, with a 6″ wire length and two plugs. Mounting stud centers are 1 7/8″ apart, with a 5/8″ coil pack. Blade dimensions are 4 5/8″ x 1 1/8″. It’s designed for compatibility with Nu-tone Br-oan, Uppco, Bay, Sears 569, Dayton, and similar brands, though model references are for compatibility demonstrations only.
Best for: Homeowners seeking a straightforward, quiet replacement for Nu-Tone/Br-oan style fans. This kit is chosen for its quiet operation and compact footprint.
Caution: Verify your mounting studs and shaft dimensions match 1 7/8″ center-to-center and 3/16″ shaft before purchase.
PANDEELS Universal Motor Replacement SM550
Product overview: 120V with plug, 60Hz, 0.29A, 3000 RPM, 50 CFM. This universal model replaces EM550 and several other EM/65100 variants. Compatible brands include Nu-tone Br-oan, Gulf Motors, Uppco, Ventorola E498-1, Sears 569, and Dayton. The replacement blade is 4 1/2″ in diameter with a 1″ height; shaft length about 3/16″ x 1 3/4″ and a 6″ wire with two plugs. Mounting studs are 1 7/8″ on center, with a 5/8″ coil stack.
Best for: Those replacing EM550 or multiple older models with a single universal kit. It suits users who want broad compatibility without buying several separate parts.
Caution: Check the exact model number you’re replacing to ensure plug-and-play compatibility, especially if your unit uses a different coil configuration.
Qofaoye Universal Fan Motor Kit
Product overview: 120V with plug, 50 CFM, 0.6A, 3000 RPM, 60Hz. This kit emphasizes a plug-and-play setup with an easy install, including a mounting guide and nuts. It uses a precision-balanced 5/8 coil pack plus aerodynamic blades to maintain noise below 1.5 sones. The shaft is 3/16″ x 1 3/4″ with a 6″ wire and two plugs. Mounting studs are centered at 1 7/8″ with a 5/8″ coil pack, and the blade measures 4 5/8″ x 1 1/8″.
Best for: DIY users who want a quick upgrade with clear instructions and minimal tools. It’s a good fit for homes where quiet operation matters during busy morning routines.
Caution: Although marketed as universal, confirm your fan housing accepts a 4 5/8″ blade diameter and 1 1/8″ blade height to avoid fit issues.
XABJU S99080176 180 CFM Motor
Product overview: 180 CFM power with replacement compatibility for 505-A, 505-B, 505MG, 507 series, and SP-61K32 models. A copper-wound motor is noted for low-noise operation and durability, with built-in vibration reduction to extend motor life. The kit offers a robust option for higher airflow needs, especially in larger bathrooms or attic spaces in need of stronger ventilation.
Best for: Users upgrading larger bathrooms or spaces requiring stronger airflow where 50 CFM units are insufficient. It’s a fit for those who prioritize high ventilation power even if it’s beyond typical 50 CFM replacements.
Caution: This motor targets higher airflow setups; verify your housing’s size and mounting compatibility before purchasing to avoid overkill or fitting issues.
BOJACK 50CFM Replacement Kit
Product overview: 50 CFM, 0.65 A, 3000 RPM, 120V, 60 Hz. Shaft measures 1.75″ long and 3/16″ in diameter, with a 6″ wire and two-prong plug. The kit emphasizes UL certification for safety, with a focus on stability and durability in typical bathroom environments.
Best for: Homeowners replacing older Nu-Tone/Br-oan or Uppco units where UL certification and straightforward installation are priorities.
Caution: Be mindful of the 2-prong plug configuration if your existing wiring differs; you may need a ready-to-connect plug format for a seamless install.
Znektis Universal Quiet Motor Kit
Product overview: 50 CFM, 3000 RPM, 120 V, compatible with Nu-Tone Br-oan 50 CFM models. Includes shaft 3/16″ x 1 3/4″, 6″ wire with two polarized plugs, and 1 7/8″ center mounting with a 5/8″ coil pack; fan blades are 4 5/8″ x 1 1/8″. The unit emphasizes quiet operation with a dynamically balanced ABS blower wheel and sound levels under 1.8 sones.
Best for: Those prioritizing near-silent operation in smaller bathrooms or in bedrooms adjacent to bathrooms. The design focuses on reduced noise while maintaining airflow.
Caution: If your current housing differs from Nu-Tone Br-oan dimensions, confirm compatibility to avoid mounting or blade clearance issues.
FRIGESWIFT SM550 Replacement Motor
Product overview: 50 CFM, 120V, 60Hz, 3000RPM with a 4 1/2″ blade and 3/16″ shaft. The kit notes reversible airflow options and compatibility with several model families, including EM550 and EM750. A 6″ wire and 1 7/8″ mounting center are provided along with a 5/8″ coil stack.
Best for: Users replacing or upgrading a middle-power bathroom exhaust fan, especially when a reversible option is desired or when replacing a broad set of supported models.
Caution: Confirm the reverse rotation capability aligns with your existing duct setup to avoid improper airflow direction after install.
Buying Guide
Key considerations for selecting a bathroom exhaust motor kit:
- Airflow needs: Match CFM to room size; 50 CFM is common for small bathrooms, but larger spaces may require higher airflow like 180 CFM in select cases.
- Voltage and plug type: Ensure 120V supply and the included plug configuration fits your wiring plan.
- Mounting dimensions: Check shaft diameter, shaft length, mounting center distance, and blade clearance to fit your housing.
- Noise level: Look for products advertised under 1.5–1.8 sones for quiet operation, especially in bedrooms or shared spaces.
- Compatibility: Consider universal replacement models if your unit brand is Nu-Tone, Br-oan, Uppco, Sears, Dayton, or similar; verify model numbers before purchase.
- Installation ease: Plug-and-play sets reduce the need for tools and expertise; DIY installers should follow included mounting guides.
- Durability and safety: UL certification and copper-wound motors generally indicate robust design and safer operation under standard bathroom conditions.
Frequently Asked Questions
- What does 50 CFM mean for a bathroom fan?
– CFM stands for cubic feet per minute and measures the volume of air the fan can move. A typical small bathroom benefits from around 50 CFM for effective humidity control. - Are universal replacement motors compatible with Nu-Tone and Br-oan brands?
– Yes, many universal kits are designed to fit Nu-Tone/Br-oan and similar models, but check shaft size, blade diameter, and mounting spacing first. - Is it hard to install a motor replacement kit?
– Most kits advertise plug-and-play or simple mounting. A basic toolset and following the included guide usually suffices for DIY installation. - Will a higher CFM motor increase energy use?
– Higher airflow can draw more power, but most 50 CFM units run efficiently at 0.29–0.6A; select based on need, not just power. - Can these motors be reversible?
– Some models like FRIGESWIFT SM550 offer reversible airflow; verify this feature if you need air direction control. - What should I verify before buying?
– Confirm shaft diameter and length, mounting center distance, blade size, and the specific model numbers your housing expects.