Restaurant Exhuast Fan Maintenance & Repairs

Now that we’ve covered exhaust fan basics including cleaning and general maintenance in parts one and two of of our Complete Guide to Restaurant Exhaust Fans blog series, we’ll focus on how to deal with a few common maintenance and repair issues.

While many repairs and mechanical problems require the expertise of a professional electrician or kitchen exhaust technician, routine maintenance can be as easy as ensuring the shaft bearings are greased or replacing a worn fan belt. These types of simple adjustments can be accomplished with a basic tool kit (hammer, Allen wrenches, socket wrench set, vise grips, nuts, bolts, washers, etc.)

Here are a few common issues you can easily take care of yourself. Continue reading

In part one of this blog series we discussed the basics of restaurant exhaust fans as well as the two most commonly used upblast exhaust fans — belt drive and direct drive. Today we’ll be going over exhaust fan cleaning and general maintenance.

Restaurant Exhaust Fan Cleaning

Exhaust fans require cleaning on a regular basis in order to keep grease, dirt, and other contaminants from building up in the hood and ductwork, and a greasy exhaust fan will clog up the works in more ways than one.

Regular exhaust fan cleaning is necessary in order for your exhaust system to run efficiently and keep it in good working order. And one of the most important reasons to keep your exhaust fan clean is to reduce your risk for fire. In addition, exhaust fan cleaning is required by NFPA fire codes and may also be enforced by state and local laws.

How often you clean your kitchen exhaust system depends on a number of factors, but regular maintenance is important no matter what. Power washing with a strong degreasing agent will take care of the day-to-day build up, but this has to be done carefully.

The chemicals in most degreasers, and the grease itself, are not good for the environment. Washing the exhaust fan where the runoff can contaminate ground water or soil, can also lead to costly fines. There are “green cleaning” methods that can be followed, which include trapping and properly disposing of dirty runoff water.

When cleaning an upblast fan, never place it upside down or past the perpendicular position as this will allow water and debris to run off into the motor and its housing. This shouldn’t be an issue if the fan is mounted with a hinge kit. This provides a safer and more efficient way to access interior mechanisms and keep the fan locked in place while servicing it. A hinge kit is also required by NFPA fire code standards.

For thorough cleaning, you will need a high-pressure washer for all exterior surfaces including underneath the fan blades. Pay attention to any electrical components and avoid getting them wet with cleanser. Utility fans that are affixed to the roof can be cleaned in much the same way as an upblast fan, by using the cleanout access port for access to the fan bowl.

Restaurant Exhaust Fan Maintenance

Most fan failures can be directly related to poor service and maintenance. For trouble-free operation of an exhaust fan, it is imperative to follow a schedule of regular maintenance check-ups.

Here are some important tips to keep in mind when maintaining your fan:

  • Do not attempt maintenance on a fan until the electrical supply as been completely disconnected.
  • Always keep the fan discharge, and approaches to the ventilator, clean and free from any obstruction.
  • Most often, fan motors are permanently lubricated but you should check the bearings periodically. If they have grease fittings, lubricate them each season. Bearings should be lubricated every 2 months. The type of grease and the amount of grease is shown to the right. CAUTION: Bearings are sealed and over-greasing them can cause damage. Do not grease until grease comes out of the seals and only add the appropriate amount.
  • All fasteners should be checked for tightness each time maintenance checks are preformed prior to restarting unit.
  • Fans require very little attention when moving clean air. However, oil and dust may accumulate and cause some imbalance. If the fan is installed in a corrosive or dirty atmosphere, periodically inspect and clean the wheel, inlet and other moving parts to ensure smooth and safe operation.

Restaurant Exhaust Fan Guide eBook

Download your free copy of our Restaurant Exhaust Fan Guide and get even more tips on efficient rooftop exhaust fan cleaning here. Plus, be sure to check out the next installment in our series on upblast exhaust fans where we’ll talk about common maintenance and repair issues.

Looking for the lowest price on upblast fans and accessories? Visit us online or call us 877.394.9731 and find out why is the #1 choice for commercial hood filters and kitchen exhaust products.

One of the most important parts of a commercial kitchen ventilation system is the upblast exhaust fan. It’s a hard working piece of equipment that must be functioning properly at all times.

For that reason, we get more questions about exhaust fans than any other product. Whether you’re looking to buy, replace, or repair a fan…there is a lot to know.

Restaurant Exhaust Fan Guide eBook

That’s why we created a new eBook – The Complete Guide to Upblast Exhaust Fans. Using that book, we are publishing a 4 part blog series that will cover everything you need to know about restaurant exhaust fans including:

  • Exhaust Fans 101
  • Cleaning & Maintenance Guidelines
  • Safety Tips
  • Troubleshooting & DIY Repairs

Let’s get started… Continue reading

The Complete Guide to Upblast Exhaust Fans

Upblast exhaust fans are an essential part of any commercial kitchen ventilation system. Whether you’re purchasing a new rooftop ventilator, or want to learn more about the proper maintenance and troubleshooting of your existing upblast fan, our new guide is an indispensable tool with all the information you need.

The experts at have put together The Complete Guide to Upblast Exhaust Fans to help you with everything from how to select the right type of upblast exhaust fan to proper maintenance, repair tips and answers to frequently asked questions. Best of all, it’s completely free! Continue reading

Air Filter MERV Ratings

What is a MERV?

Minimum Efficiency Reporting Value, or MERV, is a scale that rates the effectiveness of air filters. Created by the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) in 1987, air filter MERV ratings relate to the relative effectiveness of the filters they’re assigned to.

How Do MERV Ratings Work?

Filters are rated on two different performance factors as measured by testing both the upstream and downstream airflows of a given air-cleaning appliance. The first factor evaluated is how effective a filter is in removing large (greater than 1 micron in size) particles like pollen, pet dander, and byproducts from dust mites. The other factor is efficiency in filtering out particles less than 1 micron in size, such as smoke from cooking or tobacco, household dusts, bacteria, viruses, and even benzene gas. (As a matter of perspective, the eye of a needle (depending on the type of needle, of course) is somewhere in the 500-200 micron range.)

What is the Best MERV Rating for Your Needs?

Given that some 98 percent of all indoor air particles are under one micron in size, a filter’s ability to remove these minute yet potentially harmful specks is especially important when it will be used to improve the quality of indoor air. Continue reading

Having access to the internal mechanisms of a restaurant exhaust fan is an integral part of routine maintenance, cleaning, and repair. It’s also necessary for fire safety inspectors to have safe and easy access so they can ensure everything is up to code as specified by the National Fire Protection Association. Lastly, properly opening and closing the fan lessens the likelihood that damage could inadvertently occur to the fan bowl or seals.

Here we’ve outlined the safest ways to open and close upblast exhaust fans while ensuring both the safety of your employees and the safeguarding of your company’s – or your client’s – equipment. Continue reading

Kitchen exhaust hood and duct cleaning is faster and easier when you have the right equipment. Some of the most essential tools for hood cleaners are scrapers and blades. Not only are they the quickest way to get rid of accumulated grease buildup, they also help ensure that you have direct cleaning access to the entire system.

Kitchens with solid fuel cooking appliance are actually required by NFPA 96 fire codes to scrape clean the combustion chamber to its original surface at least once per week. But no matter what kind of cooking is done, a commercial kitchen exhaust system will eventually accumulate a dangerous amount of grease. And unless it is properly scraped and cleaned, it will eventually become a fire hazard.

With all steel construction and a durable comfort grip, our 4″ Heavy Duty Scraper can tackle the toughest hood cleaning jobs. It is available in a 13″ or 18″ length, features a steel end cap, and includes one heavy duty blade. Continue reading

Flame Gard Type II Hood Filter

Safety, performance, efficiency and code compliance are all important factors when selecting a hood filter. Reduce grease buildup in your hood system and help extinguish your chances of a grease fire by choosing the Flame Gard Type II hood filter as your kitchen’s first line of defense.

Unsurpassed Performance

The Flame Gard Type II is known for its unsurpassed grease capturing, flame blocking, and air flowing performance. It is an extremely durable baffle filter that never needs replacing. It offers trouble-free operation and is UL tested and classified, NSF listed, and meets NFPA 96 requirements.

Flame Gard Type II filters are constructed of high quality solid stainless steel and weigh about twice as much as comparable filters. They provide a positive flame barrier and are designed to handle high-heat, high grease applications. The filter maintains its structural integrity even when directly exposed to flames and can withstand temperatures in excess of 2200°F. Continue reading


Exhaust hoods are an essential investment in any commercial kitchen. The needs of a commercial kitchen place high demands on a hood capable of filtering out grease, dirt and other possible contaminants.

The most effective hoods are designed to incorporate other components to further increase the efficiency of your filtering system. Among these accessories are grease cups, also known as grease trays.

Continue reading

TRINE Heavy Duty Aluminum Filter Made In USA

If you are looking for a hard working, premium, American made baffle grease filter, our Heavy Duty Aluminum Baffle Grease Filters from TRINE are the perfect choice.

Not only are they the most durable aluminum baffle grease filters available on the market; they are also lightweight, affordable, and provide dependable and positive flame barrier protection. Plus, the bright and shiny finish of these attractive filters makes them a great selection for kitchens with an open design.

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