Broan-NuTone 688 Ceiling and Wall Ventilation Fan
A no-frills, rock-solid bathroom exhaust fan that earns a 7.5/10 — the Broan-NuTone 688 delivers reliable ventilation, whisper-quiet operation for its price tier, and dead-simple installation, making it the go-to pick for budget-conscious homeowners who just want the job done right.
Overview
The Broan-NuTone 688 is a straightforward ceiling and wall ventilation fan designed to do exactly one thing exceptionally well: move moisture and odors out of your bathroom efficiently and quietly. It is manufactured by Broan-NuTone, one of the most recognizable names in residential ventilation, and has been a staple in American homes for decades. This is not a fan loaded with Bluetooth speakers, LED nightlights, or humidity sensors — it is purely a ventilation workhorse built for homeowners who want dependable airflow without paying a premium for features they will never use.
At its core, the 688 is rated for 50 CFM (cubic feet per minute) of airflow and carries a 4.0 sone noise rating, which places it in the "noticeable but not disruptive" category for its price range. It fits standard ceiling or wall installations and includes a polymeric grille that blends unobtrusively into most bathroom ceilings. It is best suited for small bathrooms — think powder rooms, half baths, or utility bathrooms under 50 square feet — where its airflow rating is a perfect match for the square footage.
This fan is aimed squarely at the DIY renovator, the landlord replacing aging units across multiple units, or the first-time homeowner tackling a bathroom upgrade on a tight budget. It is widely available, easy to find replacement parts for, and backed by Broan-NuTone's reputation for durable residential products. If you are outfitting a master bath or a spa-style renovation, you will likely want to look higher up the product ladder — but for everyday bathrooms, the 688 holds its own remarkably well.
Key Features
Moves air efficiently in bathrooms up to 50 square feet, meeting HVI-certified performance standards for small spaces.
Installs in either ceiling or exterior wall configurations, giving it flexibility for bathrooms with varying structural layouts.
Audible during operation but not aggressively loud — appropriate for the price point and typical for entry-level ventilation fans.
The white plastic grille has a clean, neutral design that suits most standard bathroom aesthetics without drawing attention to itself.
The motor assembly plugs directly into the housing, making replacement or servicing a straightforward task even for non-electricians.
Certified by the Home Ventilating Institute, confirming that the fan's performance ratings are independently verified and accurate.
| Feature | Value |
|---|---|
| Airflow Rating | 50 CFM |
| Noise Level | 4.0 Sones |
| Mounting Type | Ceiling or Wall |
| Duct Size | 4-inch round |
| Motor Voltage | 120V |
| Power Consumption | 23 Watts |
| Recommended Room Size | Up to 50 sq ft |
| Grille Material | Polymeric (Plastic) |
| Grille Color | White |
| Certification | HVI Certified |
| UL Listed | Yes |
| Warranty | 3 Years Limited |
| Dimensions (Housing) | 9.875" x 9" x 5.75" |
| Grille Dimensions | 10.5" x 10.5" |
Pros & Cons
Pros
- Very affordable entry-level price point
- Flexible ceiling or wall installation
- Simple, DIY-friendly installation process
- HVI certified — performance is independently verified
- Plug-in motor makes future replacements easy
- Neutral grille design suits most bathrooms
- Backed by a reputable, established brand
- Widely available with easy parts sourcing
Cons
- 4.0 sones is noticeably louder than premium models
- Only 50 CFM — unsuitable for medium or large bathrooms
- No built-in light, humidity sensor, or smart features
- Plastic grille looks functional rather than stylish
- Not ideal for long duct runs due to lower static pressure
- Energy consumption is higher than modern DC-motor fans
Performance
In real-world use, the Broan-NuTone 688 performs exactly as its specifications suggest — and that is actually a compliment. In a small powder room or half bath around 40–50 square feet, it clears steam from a hot shower within a reasonable 10–15 minutes when paired with an appropriately short duct run. Condensation on mirrors visibly clears, and odor elimination is prompt and effective, which is ultimately the primary job description for this class of product.
Installation tip: For best performance, keep your duct run under 6 feet with no more than one 90-degree elbow. Longer or more complex duct runs will noticeably reduce the effective airflow delivered by this fan's motor.
The 4.0 sone noise rating is worth addressing directly. In a quiet house, you will hear this fan running — it produces a moderate hum that some homeowners find reassuring (a clear signal that ventilation is active) while others find mildly annoying. It is decidedly not a "whisper-quiet" fan, but it is also far from the rattling, industrial-sounding units that plagued older homes. Think of it as ambient white noise rather than a disruptive distraction. Sensitive sleepers in adjacent rooms are unlikely to be troubled by it.
Installation is refreshingly uncomplicated. The housing mounts between joists using the included brackets, the duct connects via a standard 4-inch collar, and the motor plugs in without any wiring to the motor itself — only the line voltage connections to the housing require wire nuts. Most competent DIYers report completing a straightforward ceiling replacement in under an hour. The plug-in motor design also means that if the motor ever fails outside of warranty, a replacement motor can be swapped in minutes rather than requiring full fan replacement.
Room size matters: The 688 is HVI certified for bathrooms up to 50 square feet. Using it in a larger bathroom will result in insufficient moisture removal and potential long-term mold risk. For 50–100 sq ft spaces, look at 80–110 CFM models from the same Broan-NuTone lineup.
Over extended use, the fan remains consistent in its performance. There are no reports of significant motor degradation or rattling developing over time in well-installed units, which speaks to the build quality at this price tier. The grille does collect dust like any bathroom fan, but it pops off easily for cleaning — a practical design choice that is often overlooked in budget products.
Value for Money
The Broan-NuTone 688 occupies the lower end of the bathroom fan market, and at that price, it represents genuinely strong value. You are not paying for features you do not need, and you are getting a well-built, HVI-certified product from a brand with decades of ventilation expertise behind it. For landlords managing multiple rental units, this cost efficiency is particularly compelling — replacing bathroom fans across a portfolio of apartments without breaking the budget is a real consideration, and the 688 answers that call reliably.
For the budget-conscious homeowner doing a quick bathroom refresh or replacing a decades-old fan that has finally given up, the 688 makes perfect economic sense. The 3-year limited warranty provides adequate peace of mind at the price, and the ease of motor replacement extends the functional lifespan of the unit well beyond what you might expect from an entry-level product. When you factor in the plug-in motor — which means you are essentially buying a serviceable, long-term fixture rather than a disposable one — the value proposition strengthens considerably.
Where the value argument weakens is for homeowners who want premium features or ultra-quiet operation. Spending a modest amount more opens up access to fans rated at 1.5 sones or below, with built-in LED lighting and humidity-sensing controls. If those features matter to you, the 688 is not the right product regardless of its price. It is also worth noting that its 23-watt power draw is higher than newer DC-motor fans, so over many years of daily use, the operating cost difference can narrow the apparent savings somewhat. That said, for its intended purpose and audience, the Broan-NuTone 688 delivers dollar-for-dollar performance that is hard to beat in its category.
Final Verdict
The Broan-NuTone 688 earns a solid 7.5 out of 10. It will not win any awards for quiet operation or stylish design, and it is firmly limited to small bathrooms by its 50 CFM airflow rating. But within those constraints, it does its job consistently, installs easily, and is backed by a trustworthy manufacturer and a serviceable warranty. It is the right fan for the right situation — and knowing exactly what that situation is will determine whether it is the perfect purchase or the wrong tool for the job. For small bathrooms, budget installations, and straightforward replacements, it is one of the best choices available at its price point.
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What size bathroom is the Broan-NuTone 688 suitable for?
The 688 is HVI certified for bathrooms up to 50 square feet. As a general rule, you need approximately 1 CFM per square foot of bathroom space, so this fan's 50 CFM rating makes it ideal for small powder rooms, half baths, and compact utility bathrooms. For larger spaces, you should step up to an 80 CFM or higher model to ensure adequate moisture control and mold prevention.
Is the Broan-NuTone 688 hard to install?
No — it is considered one of the more DIY-friendly bathroom fans available. The housing mounts between ceiling joists using adjustable brackets, connects to a standard 4-inch duct, and the motor simply plugs into the housing without any motor-side wiring. Most homeowners with basic electrical knowledge complete an installation in 45–60 minutes. Always turn off power at the breaker before beginning any electrical work.
How loud is the Broan-NuTone 688?
The 688 is rated at 4.0 sones, which is audible during operation. To put that in context, ultra-quiet premium fans run at 0.3–1.5 sones, while older bathroom fans can hit 6 sones or more. The 688 sits in the middle range — you will notice it is running, but it produces a steady hum rather than a harsh rattle. Most users find it acceptable, especially considering the price.
Can the motor be replaced if it fails?
Yes — this is one of the 688's practical advantages. The motor assembly uses a plug-in connection to the housing, so if the motor fails after the warranty period, you can purchase a compatible replacement motor and swap it out in minutes without replacing the entire unit or its ductwork. Broan-NuTone motor replacement parts are widely available through major hardware and home improvement retailers.
Does the Broan-NuTone 688 come with a light or other features?
No. The 688 is a ventilation-only fan with no built-in light, nightlight, heater, humidity sensor, or smart home connectivity. This keeps its cost low and its installation simple, but if you need any of those features, you will need to look at other models in the Broan-NuTone lineup or consider competing brands that offer combination fan and light units in a similar price bracket.