HOODMART BLOG

Round vs Rectangular Exhaust Hood Duct Systems
• July 30, 2026
Categories: Ductwork
Round vs. Rectangular Exhaust Hood Duct Systems
When building or upgrading a commercial kitchen, ventilation design is one of the most important decisions you’ll make. While selecting the right hood system is critical, the ductwork behind it plays an equally important role in safety and performance.
Many kitchen systems require either round ducting or rectangular ventilation ducting. So how do you determine which option is best for your space?
Let’s break down the differences in grease control, airflow efficiency, cleaning, and fire safety.
Grease Buildup: Why Duct Shape Matters
Grease and smoke are unavoidable byproducts of commercial cooking. How your duct system handles them directly impacts maintenance and fire risk.
Round Duct Systems
Round ducts are widely preferred in commercial kitchens for several reasons:
• No sharp corners for grease to accumulate
• Less surface area for buildup
• Grease naturally settles at the lowest point
• Easier cleaning access
Because of the smooth, circular interior, round duct systems reduce grease buildup compared to rectangular ventilation ducting. This lowers the risk of grease duct fires and simplifies long-term maintenance.
Rectangular Duct Systems
With extractor fan rectangular ducting or a range hood rectangular duct configuration, the flat surfaces and sharp corners create problem areas:
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Ductwork Packages: Simplifying Installation with HoodMart
• April 18, 2024
Categories: Ductwork
Simplified Kitchen Installations: HoodMart's Comprehensive Ductwork Packages If you're setting up or remodeling a new kitchen, wouldn't finding a shortcut that makes the process easier without cutting corners be a relief? That's what HoodMart's ...

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Do Not Neglect Your Exhaust Hood Ductwork
• November 09, 2022
Categories: Ductwork
A properly function exhaust hood system is imperative to a high operating commercial kitchen space. The components that make up an exhaust hood system require maintenance and cleaning, but if you keep up with these items you can expect a long life sp...

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Hoodmart Guide to Ductwork Cleaning
• September 10, 2019
Categories: Ductwork
Restaurants and commercial kitchen spaces rely on their exhaust hood system to keep the air in their kitchen clean of odors, smoke, and components such as grease and oil. Like the kitchen relies on the exhaust hood system to clean the air, the exhaus...

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The Importance of Access Panels
• January 02, 2019
Categories: Ductwork
Whether it be a residential or commercial kitchen space, every kitchen is unique. Just as unique as the kitchen itself is the kitchen exhaust system. There are many variables that come into play when designing your exhaust system – space, frequ...

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