Commercial Kitchen Exhaust Fan

With so many different features and options, not to mention technical details such as airflow and static pressure, you may be asking yourself “Which commercial kitchen exhaust fan is right for me?” To help you decide, we will take a look at the basics of selecting an exhaust fan for your specific needs.

All fans perform the same essential task – moving air from one place to another. Commercial kitchen exhaust fans are an essential part of your kitchen ventilation system. We depend on them to remove dust, dirt, grease-laden air, and smoke from our kitchens.

There are five main aspects to consider when choosing a commercial kitchen exhaust fan: model, static pressure, air volume flow rate, motor horsepower, and loudness. Understanding how these relate to your needs will help assist you in choosing the exhaust fan that is right for you. Continue reading

Heavy Duty L-Bar Exhaust Fan Hinge

The L-Bar Exhaust Fan Hinge Kit is the most affordable and easy to use hinge kit available for commercial kitchen exhaust fans. If you’re on a budget or just want something simple and durable, this is the hinge kit for you.

What Do Exhaust Fan Hinge Kits Do?

Even if you’re a veteran of the commercial kitchen ventilation industry, you may not understand why you need a hinge kit or what benefits an L-Bar Exhaust Fan Hinge Kit has to offer. Continue reading

Duct Access Doors

Duct access doors are a fundamental part of every commercial kitchen exhaust system. Why? Because duct access doors help facilitate the cleaning, maintenance, and inspection of exhaust systems. And this helps to keep fats, oils, and grease from accumulating on the surfaces of your ductwork. Understanding how grease gets into your ductwork in the first place is helpful in understanding the importance of duct access doors. Continue reading

food truck exhaust fan

Many communities are adopting regulations for food truck exhaust fans, hood, and ventilation system safety and maintenance in accordance with current NFPA 96 codes. For example, many state and local codes now require mobile food truck vehicles that use propane or natural gas for cooking to be equipped with a Type I or Type II commercial kitchen food truck exhaust hood. In some areas, food trucks are also required to meet NFPA 96 standards for scheduling inspection for grease buildup. Continue reading

food truck exhaust fan fire safety

There are currently no national codes, standards or guidelines specifically defined to provide minimum fire safety requirements for food truck exhaust fans. But that may all be about to change very soon.

Food Truck Industry Growth

By the time the NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations was adopted in the late 1940s, food trucks had already become quite popular. Continue reading

Roof Mounted Exhaust Fan

1) Inspect Your Equipment

Before installing your roof mounted exhaust fan, inspect the equipment for any interior or exterior damage. Make sure you have all of the accessory items and that they are also damage free. Check for and retighten any bolts or screws that may have become loosened. Then, turn the blower wheel by hand to make sure that it is able to rotate freely.

2) Select and Prepare Your Site

The next step in installing your restaurant kitchen exhaust fan is to select and prepare the site where you will install it. Locate the fan as close as possible to the area it will be serving in order to limit any long or twisted duct runs. The fan discharge should be located at least 10 feet away from any supply intakes.

Confirm that your fan supports are strong enough to hold your equipment and make sure you have enough clearance around your installation site to safely set up your equipment and lift it into its final position. And of course, before installing or servicing any commercial kitchen exhaust equipment, always disconnect the power.

Roof Curb for Roof Mounted Exhaust Fan

3) Curb and Ductwork

Most rooftop ventilators are designed to be installed on top of a prefabricated or factory built roof curb. Follow the curb manufacturer’s instructions for proper curb installation. Roof curbs should be connected to structural roof members with at least four lug screws, anchor bolts, or other appropriate fasteners per curb flange.

Curb flanges should be caulked to the roof. The fan should be installed on a curb and/or rail elevated no less than 14” above any surface. Be sure that the duct connection and fan outlet are properly aligned and sealed. Then, secure the fan to the curb through the vertical portion of the ventilator base assembly flange using a minimum of eight lug screws, anchor bolts, or other appropriate fasteners.

Depending on the type of curb installation and roofing material, shims may also be required. When you are done installing, double check all fasteners for tightness.

4) Roof Mounting

The roof mounted upblast exhaust fans sold by are specified for a specific CFM and static pressure. The ductwork attached to these units can significantly affect their airflow performance. Due to this, it is important that flexible ductwork and square elbows not be used. It is also very important to avoid unnecessary transitions and turns in the ductwork near the fan inlet. These can cause system effect and drastically increase the static pressure while reducing the airflow.

For more information, you can refer to the guides and recommendations for duct runs set forth by the Sheet Metal & Air Conditioning Contractors’ National Association.

If your ventilation system requires a backdraft damper, you would install that first and secure it within the roof curb. A note of caution— National Fire Protection Association (NFPA) 96 fire codes recommend that dampers should not be installed when an exhauster is used for the removal of smoke and/or grease laden vapors from commercial kitchen equipment. You should also consult with your state and local codes for any more detailed requirements.

In accordance with NFPA 96, if you are installing an upblast kitchen hood exhaust fan, you will need to ensure that the discharge is at least 40 inches above the rooftop. Run the power cord through the conduit tube, which is located on the top skirt, outside of the unit. Then, secure the ventilator curb through the vertical portion of the ventilator base assembly flange using lug screws, anchor bolts, or other suitable fasteners.

5) Electrical

Now it’s time to connect the fan motor to your power source. Check to make sure that the voltage and phase of the power supply and the wire amperage capacity are compatible with the requirements listed on the nameplate of your fan motor.

Make sure the power line wiring is de-energized. Also, be sure to lock and tag the disconnect switch or breaker to prevent an accidental power up. The disconnect switch is located on the exterior of upblast fans and in the interior of downblast fans. On downblast direct drive fans, the disconnect function is built into the speed controller.

According to the National Electric Code, short circuit protection should be supplied by a dedicated branch circuit that is run to a junction box. Before you power up the fan, check the ventilator wheel again for free rotation and make sure that the interior of the fan is free of any loose debris or shipping materials. Be sure to check all fasteners for tightness and then re-install the motor dome. Please note that if any of the original wire supplied with the fan has be replaced, it must be replaced with type TW wire or equivalent.

6) Roof Mounted Exhaust Fan Accessories

A grease pipe is usually positioned towards the roof slope to provide single-point drainage of water and residue. Some means for collection such as an exhaust fan grease box must be provided. It can be placed directly under the exhaust fan trough or an adapter and pipe can be used to carry the water and residue to a remote collection point. offers a wide range of rooftop grease containment systems to suit any need.

Roof Mounted Exhaust Fan AccessoriesCode of the NFPA 96 fire codes states that “approved upblast fans with motors surrounded by the airstream shall be hinged.” Not only is it required, but a hinged exhaust fan is also much safer and easier to clean and maintain. So when installing a roof mounted fan, it’s smart idea to also go ahead and install an exhaust fan hinge kit. carries twenty different hinge kits to meet the needs of a variety of budgets and fan sizes. Please note that exhaust fans with hinge kits require extra slack in the wiring to the fan to allow it to be tilted back to a fully open position.

Another affordable solution to NFPA fire code requirements is our weatherproof exhaust fan access panel. It can be installed in less than 30 minutes and provides a four-inch opening for easy inspection and cleaning of fan blades.

One of our most popular roof mounted fan accessories is our exhaust fan safety handle. These unique handles provide a safer way to lift and close the inner fan and duct work without causing any damage to the fan bowl or seals. By providing easier access, they help prevent maintenance issues during cleaning, servicing, and fire inspection.

Before attempting to assemble, install, operate or maintain any commercial kitchen ventilation equipment, it is important to carefully read and save all of the materials that came with the product. And of course, protect your equipment, yourself, and those around you by observing all safety information.

If you have any questions about installing your roof mount fan, feel free to give our customer service specialists a call at 877.394.9731 or live chat with us on our website.

Restaurant Kitchen Exhaust Fan Replacement Parts

It’s just another Friday in your commercial kitchen — until someone notices that the upblast exhaust fan isn’t functioning properly. Your repair technician determines the problem is a simple fix but they don’t have the replacement part you need in stock.

After several more phone calls to locate the part, you realize you have no other choice but to shut down for the weekend. The worst part it is that you could have avoided all of this by keeping a few spare restaurant kitchen exhaust fan replacement parts on hand. Continue reading

Commercial Kitchen Ventilation Systems

Most of the tasks in commercial kitchens are accomplished with relatively simple tools: stoves provide a flame for cooking, refrigerators keep food cold, and knives chop. But one of the key exceptions to this principle is with a commercial kitchen ventilation system. What looks to be a simple box that allows air to escape is, in fact, a complex system of interconnected parts that must operate together for efficient ventilation.

In the harsh environment of a commercial kitchen, it’s critical to rely on an effective hood system to keep the work environment safe and clean, as well as to protect expensive equipment from damaging grease build-up. Thankfully manufacturers now produce ventilation systems that are lighter, more durable, and more able to handle the rigorous demands placed upon them. Continue reading

Ductmate Access Doors

At, we are dedicated to providing restaurant owners and managers with a diverse selection of hood accessories, which is why we are proud to carry high-quality duct access doors from Ductmate. Ductmate is the largest manufacturer of HVAC accessories in all of North America, and they are committed to offering a variety of different duct access doors to fit any situation or budget.

In addition to manufacturing durable, easy-to-install access doors, Ductmate is devoted to sustainability efforts, and they regularly incorporate green manufacturing processes into many of their products. They are also a member of the Green Building Alliance and the US Green Building Council so that you can ensure the safety of your kitchen while reducing your environmental impact. Continue reading

Food Truck Exhaust Fan

If you’re starting your own food truck business you have hundreds of decisions to consider, but one of the most important will be what type of ventilation system to install in your truck. Ventilation systems are the heart of any mobile kitchen, and they have to work hard in order to move a lot of smoke and debris out of a very cramped space. The best hoods are durable enough to handle the demands of a food truck kitchen, and efficiently keep the environment clean so you can do your best work. Continue reading