Install The Right Hinge, Not Just Any Hinge

Install The Right Hinge, Not Just Any Hinge

In previous Omni blogs, we have established why installing a hinge kit on rooftop exhaust fans is so important. Hinges prevent fans from crashing down on the heads and hands of hood cleaners and other service providers. They provide support which increases the effectiveness and longevity of the fan. Without hinges, the heavy, unwieldy and greasy fan must be lifted off of the base and set on the roof before cleaning. The fan can easily be dropped, leading to foot injuries and possible severe damage to the fan and the roof. Thanks to the efforts of concerned people and organizations, codes and standards that address the necessity for hinges, and better educated code enforcers and decision makers in the restaurant industry, exhaust fans without hinges are becoming the exception instead of the rule.

That’s a great start. But there is a lot more involved with making sure service people and property are safe than putting any old hinge on a fan and thinking “OK, we’re safe and we’re compliant with codes now. Glad that’s been taken care of.” It would be simple if all exhaust fans were pretty much the same. But they aren’t. They come in all sorts of sizes, shapes, weights and configurations. Many have unique oddities that require a unique hinge. They may be mismatched or tapered or wall mounted, which would necessitate hinge modifications.

Fan bases vary a great deal in length. A good rule of thumb is that a hinge arm should extend two-thirds of the fan base length on smaller or medium sized fan bases (up to 30 inches) and as close to the entire length as possible for longer bases or heavier fans. Piano or door style hinges and other shorter hinges don’t come close to meeting that standard. But they are hinges. Sometimes a restaurant owner or landlord is asked by the fire marshal to have a hinge installed on a fan. They might find the cheapest one available just to comply. It may satisfy the request, but it doesn’t fulfill the intent, which is the safety of service providers and property. A deficient hinge can lead to a false sense of security to the service provider so if the hinge fails, the worker may not be prepared to avoid the falling fan.

Even if a hinge is the right size for a fan, that might not be enough. Almost all hinges that don’t have the Omni name on them use chains or cables to hold the fan open. Chains in particular are subject to breaking (no stronger than the weakest link) and neither prevents fans from suddenly slamming down, especially in windy conditions. This is why the NFPA 96 standard says that hinge kits must have service hold open retainers as the safe device to hold open fans in place. Omni’s standard and Quick Fit Super Hinges all include the service hold open retainer and therefore are the only NFPA 96 compliant hinges on the market. The variety of sizes, the adaptability to unusual fans and a lifetime warranty are other reasons why the Omni Super Hinge is the gold standard in the industry. At Omni we strive to find new solutions to a variety of grease containment issues and we would love the opportunity to work with you. Give us a call at (847) 468-1772!

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Protect your restaurant from costly grease fires. Learn key fire prevention tips, NFPA 96 compliance insights, and rooftop safety solutions from Omni Containment Systems.
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In a commercial kitchen, the focus is often on what’s in plain sight: clean counters, properly functioning appliances, and seamless service. But hidden just above the kitchen line — in the ductwork of the exhaust system — are critical risks that can’t afford to be ignored. One of the most significant yet overlooked contributors to kitchen fires is poor duct access. Without proper access, routine cleaning becomes incomplete or impossible, allowing dangerous grease buildup to persist unchecked. These hazards can ignite in a flash, threatening lives, destroying property, and leading to costly downtime. In addition, failure to maintain accessible duct systems can violate fire codes and invalidate insurance coverage. If your kitchen exhaust system isn’t fully accessible, the consequences can be far more than just inconvenient — they can be catastrophic. Why Duct Access is a Fire Safety Essential Grease, fats, and oils naturally accumulate inside the ducts of every kitchen exhaust system. 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Cleaning Plans That Reinforce Safety While access doors are foundational, a comprehensive cleaning and inspection plan is equally important. Grease buildup inside ducts should never exceed 0.002 inches (50 microns). Measuring this accurately — and consistently — helps you schedule cleaning before that threshold is crossed. Omni makes this easy with our stainless-steel grease comb , a simple but powerful tool that allows your team to check grease depth on the spot. This proactive approach ensures you're never left guessing whether it's time for professional cleaning. For most commercial kitchens, professional duct cleanings are recommended every six to twelve months, depending on cooking volume and equipment type. In addition, components like filters and containment tray pads should be inspected and replaced every three to six months to ensure optimal performance and containment of grease particles before they reach the ductwork. 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Poor duct access allows grease to build silently, turning your exhaust system into a ticking time bomb. But with the right access doors, cleaning tools, and maintenance strategy, you can eliminate those risks before they become real threats. Omni Containment Systems provides everything you need to take control of your kitchen exhaust safety. With Access Armor™, grease monitoring tools, and expert guidance, you can ensure that your ducts are clean, your kitchen is compliant, and your business is protected — from the inside out. Ready to take the first step toward safer ducts and fewer fire hazards? Contact us today to learn more about our products and compliance solutions.
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