Get The Inside Scoop On Kitchen Exhaust Fan Types
Upgrading your kitchen exhaust fan can make a big difference in air quality, odors, and smoke control. But with so many types of kitchen ventilation fans out there, how do you choose? From ducted range hoods to powerful inline fans, this guide breaks down the pros and cons of common residential and commercial kitchen exhaust options.
We'll look at key factors like CFM ratings, noise levels, ducting considerations and more. Read on for an in-depth look at the inner workings of kitchen exhaust fans so you can determine the best solution for your needs.
Overview of Common Kitchen Exhaust Fan Types
There are several main types of kitchen ventilation fans, each with their own strengths and ideal applications:
Ducted Hoods
Ducted range hoods are installed over the cooktop and vent directly outside via ductwork. This makes them very effective at capturing smoke, grease, and odors at the source. Ductwork does make them trickier to install, however. Ducted hoods come in under-cabinet and chimney styles.
Ductless/Recirculating Hoods
Ductless hoods recirculate air through filters instead of venting outside. They are easier to install but won't remove smoke and odors as effectively. The filters require regular cleaning and replacement.
Downdraft
Downdraft vents are built into the cooktop or range. They pull air downward and often vent via ductwork. Downdrafts are a good choice for island cooktops without overhead ventilation.
Chimney Hoods
Chimney hoods mount to the wall or ceiling and feature a large overhead canopy. They give a dramatic look while powerfully removing contaminants. Ducted or ductless designs are available.
Inline Fans
Inline fans are installed remotely, like in the attic or roof. They are paired with ductwork and often used in commercial kitchens. Inline fans can be incredibly powerful but are less convenient to access.
Ceiling or Wall-Mounted Fans
Less powerful than hoods, these fans mount on walls or ceilings away from the primary cooking area. They work well for light ventilation needs.
Ducted vs Ductless Hoods
One of the biggest decisions is whether you need a ducted or ductless hood. Here are the key differences:
Ducted Hoods
Ducted range hoods are the most effective choice because they actively vent contaminants outside. However, installing ductwork can add significant cost and may not be feasible in some homes. Ducting must also be properly maintained.
Ductless/Recirculating Hoods
Ductless models recirculate air through reusable aluminum mesh and/or charcoal filters. They trap grease and absorb some odors. However, they aren't as effective for removing smoke. The filters require cleaning and replacement every few months.
Pros and Cons of Each Type
In summary, ducted hoods are superior for ventilation but ductless offer more flexibility. Ductless are also the only option if ducting isn't possible. Just be prepared for reduced smoke removal and more filter maintenance.
Commercial Kitchen Exhaust Fan Options
Commercial kitchens have greater ventilation needs due to high heat, grease output and codes. Some top choices include:
Wall-Mounted Hoods
Wall-mounted hoods are workhorses in restaurant kitchens. They come in various widths and feature durable materials and fire suppression capabilities.
Island Canopy Hoods
Island canopy hoods are essential for ventilating larger island cooking setups. Stainless steel and galvanized steel construction stand up to high temperatures.
Inline Fans
Inline fans let you mount the motor remotely for easier access. Look for stainless steel housings and squirrel cage blowers. CFM ratings of 5,000+ are common.
Commercial Kitchen Codes and Regulations
Be sure to follow requirements like minimum airflow based on kitchen size and fire suppression systems. Work with experienced commercial kitchen contractors.
Residential Kitchen Exhaust Fan Choices
Home kitchens can choose from several effective yet affordable options:
Under-Cabinet Hoods
Under-cabinet hoods mount below upper cabinets over the cooktop. They come in sleek, low-profile designs in widths like 30" or 36".
Chimney Hoods
Chimney hoods make a striking visual statement while offering powerful ventilation. Look for features like dishwasher safe filters, halogen lights and variable speed fans.
Downdraft Vents
Downdraft vents are great for island cooking setups. Look for models with a high CFM rating and built-in controls.
Ceiling or Wall-Mounted Fans
For homes without adequate hood space, wall or ceiling exhaust fans can provide basic ventilation. Choose a quiet, ENERGY STAR certified model sized appropriately for your kitchen.
Key Factors When Selecting a Kitchen Exhaust Fan
Beyond just ducted vs. ductless, keep these factors in mind when selecting any kitchen ventilation system:
CFM and Airflow
CFM (cubic feet per minute) measures airflow. Look for a CFM aligned with your kitchen size and cooking habits. Insufficient airflow results in lingering smoke and odors.
Noise and Sones Ratings
Hood fans can generate noticeable noise. Compare sones ratings (lower is quieter). Look for features like multiple fan speeds and vibration dampening.
Ducting Considerations
For ducted systems, consider duct routing, materials (metal is best), transitions, and terminus. Get ductwork professionally installed for maximum airflow.
Style and Placement
Hood type and mounting should suit your cooktop, kitchen layout and ceiling height. Prioritize proper CFM over aesthetics.
Operating and Maintaining Your Kitchen Exhaust Fan
To keep your kitchen ventilation performing its best:
Cleaning and Filter Replacements
Regularly clean grease from hood filters. Replace charcoal filters every few months. Have ducts professionally cleaned annually.
Signs of Problems and When to Repair/Replace
Replace hoods displaying rust, flaking paint or dysfunctions. Watch for changes in fan noise or performance.
Improving Efficiency and Performance
Seal ductwork, ensure adequate CFM ratings, and eliminate airflow obstructions. Consider upgrades like inline fans or makeup air systems.
The right kitchen exhaust fan clears the air, captures smoke and contains cooking odors. Carefully weigh ducted vs. ductless designs, CFM needs and noise levels. Prioritize hood placement and airflow paths. With proper selection, installation and maintenance, your kitchen ventilation will keep the air clean for years to come.