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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Rooftop Grease Buildup and How To Prevent It
• July 27, 2026
Categories: Hoods
Rooftop Grease Buildup: Causes, Risks, and How to Prevent It Rooftop grease buildup is a common (and often overlooked!) issue in commercial kitchens. If your commercial kitchen exhaust hood system isn’t properly maintained, grease can escape t...

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Safely Using Deep Fryers Within A Food Truck
• July 24, 2026
Categories: Food Trucks
Food Truck Deep Fryer Safety: Ventilation, Setup & Best Practices Using a food truck deep fryer can be a game-changer for your menu, but it also introduces serious safety and ventilation considerations. In a compact space, proper setup, cleaning...

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Roof Curbs for Exhaust Fans: A Complete Guide
• July 20, 2026
Categories: Fans
A roof curb might look simple, but it plays a critical role in your commercial kitchen ventilation system. If you’re installing an upblast exhaust fan, choosing the right roof curb for an exhaust fan ensures proper support, weather protection, ...

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Avoiding Common Food Truck Health Code Violations
• July 16, 2026
Categories: Food Trucks
Avoiding Common Food Truck Health Code Violations Running a food truck takes more than great recipes and a busy service window. To stay open and profitable, your mobile kitchen also needs to meet strict food truck health code requirements. Even...

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