Hood Fans — Self-Circulating vs. Exterior Venting

When it comes to a hood fan and its interior venting, there are two options to consider; Self-Circulating (Duct-Free) vs. Exterior Venting (Vented). Self-Circulating Vents are typically seen in microwaves and basic hood fans while Exterior Venting is used for ceiling-mounted fans such as when a cooktop has been placed within an island. Below, we outline the pros and cons and highlight some of our recommendations to help with your decision.

Self Circulating (Duct-Free)

• Pros

  • Cost-effective (Adding new exterior venting may be costly if one does not exist in the current space)

  • Quiet (varies per model)

  • Lighting features 

  • The filter can trap oil and grease that disperse into the air 

  • Charcoal/Carbon filters are an option to reduce odors and smells 

• Cons

  • Smoke and odors may take longer to disappear

  • Odors recirculate throughout the room and can linger through the rest of home

Overview/Our Recommendations

• Wash/replace the filter of self-circulating fan every 2-3 months and approximately every 6 months for freestanding vents 

• Vent to outdoors if possible 

• Keep duct runs short to minimize bends for maximum airflow rate

• Ensure you purchase sufficient size: your hood fan should be the same width as your cooking surface or bigger. For example, 30” range with 30” fan OR 30” range with 36” fan if you desire this look and function. 

• Always check the installation and maintenance guides for your selected hood fan and hire a professional installer.

A note on Over-the-Range Microwave vs. Range Hoods; if you do a lot of cooking with heavy oils, spices and fish go for a ducted hood fan that vents out to the exterior to help rid the lingering smells and smoke. These hood fans tend to be more powerful for heavy cooking and frying. Even the best vent cannot vent as well as a range hood.

Questions? Connect with our team today — let’s start your renovation planning process!