Best 8 Inch Exhaust Fan Motor Options for 2026
Choosing the right 8 inch exhaust fan motor can improve bathroom ventilation, reduce moisture, and cut noise. The following products are commonly used as direct replacements or compatible upgrades for 8-inch housing fans. Each option includes key specifications, compatibility notes, and typical installation considerations to help you pick a dependable, efficient motor. Below is a quick summary of the selected products.
| Product | Brand | CFM | Voltage | Approx. Power | Notes |
|---|---|---|---|---|---|
| BOJACK Bathroom Vent Fan Motor | BOJACK | Unknown | 120V | 30W | UL/CSA certified; 6.496″ wire length; 0.60 AMP; 3500 RPM |
| Siasky Universal Vent Motor Kit | Siasky | 50 CFM | 120V | Low | Quiet, 6″ wire, balanced coil and blades |
| Broan-NuTone RE70BN Motor Kit | Broan-NuTone | 70 CFM | 120V | Moderate | DIY friendly replacement for many 70 CFM fans |
| yrjns S97015162 Motor Assembly | yrjns | 80 CFM | 120V | Moderate | Compatible with many NuTone/Broan models; 8″ x 8-1/4″ housing |
| RLOZUI 8 Inch Exhaust Fan Motor | RLOZUI | Variable | 110V | Low–Mid | Double bearing brushless design; durable housing |
BOJACK Bathroom Vent Fan Motor 120V
The BOJACK motor is a direct replacement option for select bathroom exhaust fans. It operates at 120V and 60 Hz with a current draw around 0.60A and about 30 W of power. At 3500 RPM, the motor supports robust air movement while maintaining energy efficiency. A 6.496″ wire length helps with flexible installation, especially in tight ceilings or chase spaces. The unit is UL/CSA certified, emphasizing safety and reliability for residential use. This motor suits 8″ housing setups when the fan model and mounting pattern align with its shaft and mounting points.
Siasky Universal Vent Motor Kit
The Siasky kit is designed as a universal motor replacement for several Nu-Tone/Br-oan style exhaust fans. It provides 120V operation at about 50 CFM, with a 0.6A draw and roughly 3000 RPM at 60 Hz. The kit features a balanced 5/8 coil pack and aerodynamic blades to keep noise low—often under 1.5 sones. Dimensions include a 3/16″ shaft and 6″ wire length with two plugs, making it suitable for many 8″ housing units. The motor is marketed as broadly compatible with multiple brands, which can simplify upgrades in homes with mixed components.
Broan-NuTone RE70BN Motor Kit
The RE70BN replacement motor kit is designed for 70 CFM Broan-NuTone fans, with the promise of up to 40% more power for some 50 CFM models. It aims to improve ventilation efficiency, helping remove odors and moisture more effectively. Installation is described as quick and DIY-friendly, typically avoiding need for wiring or drywall work in many cases—often a simple swap that completes in about 10 minutes. This makes the RE70BN a practical upgrade for 8″ housing fans that use compatible motor mounting patterns and shaft dimensions.
yrjns S97015162 Motor Assembly
The S97015162 assembly is a broader replacement option for 8″ x 8-1/4″ housing fans, compatible with an array of Broan NuTone models including 676-G, 683-C, and 684-D series. It provides up to 80 CFM and can potentially raise airflow by up to 60% compared with older motors. It operates around 2.5 sones for quieter performance and uses a straightforward installation process that involves a few screws and plug-in connections. This makes it a solid candidate for upgrading bathroom ventilation while maintaining compatibility with common duct and housing dimensions.
RLOZUI 8 Inch Exhaust Fan Motor
The RLOZUI motor is marketed for 8 inch exhaust fan installations, with a 110V supply and an 80W power rating. The unit emphasizes a durable metal build, anti-corrosion and anti-scratch properties, and includes an automatic closing valve design to prevent backdrafts. The double ball bearing outer rotor brushless motor is highlighted for efficiency and quiet operation, contributing to longer service life and reduced friction. This motor is suitable for broader HVAC setups requiring robust performance in 8″ housing configurations.
Buying Guide: Key Purchase Considerations
- Compatibility: Confirm housing dimensions (often 8″ x 8-1/4″ for many NuTone/Broan models), shaft size, mounting holes, and wiring type. Some motors list broad compatibility, but physical fit still matters.
- CFM and noise: Higher CFM improves moisture removal but may increase noise. Look for motors with noise ratings (sones) aligned to your comfort level, typically under 2–3 sones for bathrooms.
- Electrical specs: Ensure voltage (120V in US) and amperage fit your circuit. Some replacements use 2-prong plugs, while others require direct wiring.
- Installation practicality: DIY-friendly kits save time but verify if wiring or drywall work is needed. Replacement motors with simple plug-in connections are ideal for casual homeowners.
- Durability: UL/CSA certification and motor design (brushless vs. shaded-pole, bearing type) influence longevity and maintenance needs.
- Brand and model compatibility: When replacing a specific model, prefer OEM-style kits or explicitly listed compatible models to minimize mismatch risks.
- Noise and efficiency features: Balanced rotors, low-friction coil packs, and blade design contribute to quieter operation and energy efficiency over time.
In selecting an 8 inch exhaust fan motor, weigh the balance between compatibility, airflow requirements, and installation ease. For updated bathrooms with moisture control as a priority, prioritize higher CFM options paired with quiet operation. For simple swaps on older homes, a straightforward plug-and-play kit with universal compatibility can offer a practical, no-fuss upgrade.