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AirClear Kitchen

Kitchen ventilation literacy

See the invisible work above your stove

A range hood is not decorative trim. It is the primary control for combustion by-products, fine particles, and moisture that cooking releases into your home. AirClear Kitchen unpacks how hoods actually perform—so you can choose wisely and use what you already own more safely.

Why “turning on the fan” is only half the story

Effective capture depends on geometry and airflow working together. The hood must overhang the front burners enough to intercept the buoyant plume before it spreads across the room. A narrow hood mounted too high behaves like a ceiling fan near the cooktop: it moves air, but not necessarily through the polluted region you care about.

Manufacturers publish airflow in cubic feet per minute (CFM), yet raw CFM rarely equals what you feel at the pans. Duct friction, transitions, and outdoor termination caps can quietly shed performance. That is why duct design belongs in the same conversation as the hood model—especially in apartments where long, flexible runs are common.

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CFM: useful, if you know what it is measuring

CFM describes volumetric flow at a test condition. In real kitchens, hoods compete with house drafts, open windows, and even powerful bath fans on the same duct system. Treat published CFM as a comparator between models of similar class, not as a guarantee of face velocity at your burners.

For high-output cooking—woks, searing, or multiple burners—many designers size toward the upper end of common residential hoods, then verify duct capacity. Undersized ducts create noise and turbulence; you hear the struggle before you see the smoke leave.

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Rule-of-thumb, with humility

Some guides suggest roughly 100 CFM per linear foot of hood width for typical electric cooking, and more for heavy gas use. These shortcuts ignore ceiling height, island geometry, and makeup air rules in tight homes. Use them as conversation starters with a qualified installer—not as a substitute for local code and a site walkthrough.

If your hood feels weak, the duct run—not the motor—is often the first place to investigate.

Ducted exhaust vs recirculating: two different promises

Ducted to outdoors

This configuration removes a large share of pollutants from the dwelling—provided the duct is intact, insulated where needed, and terminated with an appropriate cap. Cold-climate homes may require attention to backdraft and condensation in vertical runs.

Recirculating (ductless)

Charcoal filters adsorb some odors and certain gases, but they do not replicate true exhaust. Maintenance becomes part of performance: saturated filters increase pressure drop and can make the fan work harder with diminishing returns. Plan filter replacements on a calendar, not when smells return.

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Filters, grease management, and fire sense

Baffle filters channel grease into removable trays; mesh filters intercept finer droplets but need frequent degreasing. Regardless of style, grease accumulation is a fuel load directly above heat. Cleaning is not housekeeping trivia—it is part of fire risk reduction.

If you cook often, schedule filter maintenance like you would brush maintenance on a bicycle chain: predictable wear, predictable intervals.

Noise in real life

Manufacturers cite sones at specific speeds. Higher speeds often trade comfort for capture. If a hood is too loud to run, it will not run—and the best engineering in the world cannot help a switch that stays off.

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Questions people ask after reading the brochure

Each topic opens a dedicated article with cross-links to the rest of the series.

Do I need makeup air?

Powerful exhaust can depressurize tight homes. Learn how pressure interacts with chimneys, ducts, and high-CFM hoods.

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Is a wider hood always better?

Width and depth both change capture area. Compare front-burner spillover, island geometry, and mounting height.

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Can I trust “filter life” indicators?

Charcoal saturation, humidity, and oil type all skew signals. Build a calendar-based replacement habit.

Open article

Go deeper on our story and policies

AirClear Kitchen is an independent editorial project. We do not sell appliances; we clarify how ventilation behaves so you can ask sharper questions.

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