How to Calculate CFM for Your Commercial Hood System: A No-Nonsense Guide for Kitchen Pros

How to Calculate CFM for Your Commercial Hood System Without Losing Your Mind

Let me tell you about the first time I had to figure out CFM for a commercial hood system. I was standing in a half-renovated kitchen in East Nashville, staring at a grease-stained blueprint while the contractor tapped his foot. The health inspector was coming in two days, and I had no idea if our ventilation was up to snuff. That sinking feeling? Yeah, you know the one. Turns out, calculating CFM isn’t rocket science, but it’s not exactly intuitive either.

Here’s the thing: getting your CFM right isn’t just about passing inspections. It’s about keeping your kitchen from turning into a sauna, your staff from gasping for air, and your grease traps from becoming a science experiment. Overdo it, and you’re wasting energy (and money). Underdo it, and you’re looking at a kitchen that’s basically a biohazard. So, how do you strike that balance?

In this guide, I’m breaking down how to calculate CFM for your commercial hood system in a way that won’t make you want to throw your calculator out the window. We’ll cover the basics, the gotchas, and the real-world tweaks that most guides gloss over. By the end, you’ll be able to walk into any kitchen, eyeball the setup, and say, “Yep, this needs X CFM”-without the panic sweats.

The Absolute Basics: What the Heck Is CFM Anyway?

CFM 101: The Non-Boring Explanation

CFM stands for cubic feet per minute, and it’s the gold standard for measuring how much air your hood system moves. Think of it like this: if your kitchen is a bathtub, CFM is how fast you’re draining the water. Too slow? You’re swimming in steam and smoke. Too fast? You’re sucking out all the heat (and your utility bill is crying).

But here’s where it gets tricky: CFM isn’t just about the hood itself. It’s about the whole system, the hood, the ductwork, the fan, even the type of food you’re cooking. A hood over a charbroiler needs way more CFM than one over a salad station. And if you’re in a high-altitude city like Denver? Yeah, you’ll need to adjust for that too. (More on that later.)

So, how do you even start? First, let’s talk about the two main types of hoods you’ll deal with:

• Type I Hoods: These are your heavy hitters, designed for grease-laden vapors (think grills, fryers, woks). They’ve got grease filters and fire suppression systems because, well, fire is bad.
• Type II Hoods: These are for steam, heat, and odors (ovens, dishwashers, pasta cookers). No grease filters needed, but don’t skimp on the CFM unless you want your kitchen to feel like a tropical rainforest.

I remember installing a Type II hood over a dishwasher in a tiny café and thinking, “How bad could it be?” Famous last words. By the end of the lunch rush, the walls were sweating. Turns out, I’d lowballed the CFM. Lesson learned: always overestimate for steam-heavy setups.

Why Your CFM Calculation Can Make or Break Your Kitchen

Let’s get real for a second. If you mess up your CFM calculation, here’s what happens:

• Too Low: Your kitchen turns into a pressure cooker (literally). Smoke hangs in the air, grease builds up on surfaces, and your staff starts looking like they’ve run a marathon. Oh, and the health inspector? They’ll shut you down faster than you can say “ventilation issue.”
• Too High: You’re basically throwing money out the window. Over-ventilating means your HVAC system has to work overtime to replace the air you’re sucking out, which spikes your energy bills. Plus, you might create negative pressure, which can cause backdrafting (dangerous with gas appliances).
• Just Right: Your kitchen stays comfortable, your staff can breathe, and your equipment lasts longer because it’s not drowning in grease or steam. Oh, and you pass inspections without sweating bullets.

So, how do you get to “just right”? It starts with understanding the three main methods for calculating CFM. We’ll dive into each one, but first, let’s talk about the variables that’ll make or break your calculation.

The Variables That’ll Make or Break Your CFM Calculation

1. The Type of Cooking Equipment (And Why It Matters More Than You Think)

Not all cooking equipment is created equal. A deep fryer and a steam table might both sit under a hood, but they don’t produce the same amount of heat, grease, or steam. Here’s a quick breakdown of how different appliances affect your CFM needs:

• High-Grease Appliances (charbroilers, griddles, fryers): These are the CFM hogs. They produce a ton of grease-laden vapors, so you’ll need a Type I hood with a higher CFM. Rule of thumb? 100-150 CFM per linear foot of hood for these bad boys.
• Medium-Grease Appliances (ovens, ranges, tilting skillets): These still need a Type I hood, but you can get away with 80-120 CFM per linear foot.
• Low-Grease/Steam Appliances (steam tables, dishwashers, pasta cookers): These can use a Type II hood, and you’ll typically need 50-100 CFM per linear foot. But don’t skimp, steam is sneaky, and it’ll fill your kitchen fast if you’re not careful.

I once worked with a BBQ joint that had a massive charbroiler under a hood that was sized for an oven. By the end of the night, the walls were coated in grease, and the staff was wearing bandanas like they were in a spaghetti western. Moral of the story? Match your CFM to the equipment, not the hood size.

2. Hood Style: Wall-Mounted vs. Island vs. Backshelf

The style of your hood changes how much air it needs to move. Here’s the deal:

• Wall-Mounted Hoods: These are the most common and the most efficient. They’re mounted against a wall, which helps contain the air and makes the hood more effective. You’ll typically need 100-150 CFM per linear foot for Type I hoods over high-grease equipment.
• Island Hoods: These are freestanding hoods (think open kitchens or food courts). They’re less efficient because air can escape from all sides, so you’ll need 15-30% more CFM than a wall-mounted hood. Pro tip: If you’re using an island hood, oversize it-trust me, you’ll thank me later.
• Backshelf Hoods: These are low-profile hoods that sit right above the cooking surface (common in fast-casual setups). They’re great for space-saving but require precise CFM calculations because they’re so close to the equipment. You’ll usually need 200-300 CFM per linear foot for high-grease appliances.

I installed a backshelf hood in a food truck once, and let’s just say it was a learning experience. The hood was so close to the griddle that it couldn’t capture all the grease, and by the end of the day, the ceiling looked like it had been through a deep-fryer apocalypse. Backshelf hoods need more CFM than you think-don’t make my mistake.

3. Ductwork: The Silent CFM Killer

Here’s something most guides don’t tell you: your ductwork can murder your CFM. Even if you calculate the perfect CFM for your hood, a poorly designed duct system will choke it. Here’s what to watch out for:

• Duct Length and Bends: Every foot of ductwork and every 90-degree bend adds resistance, which reduces airflow. The rule of thumb? Add 10-15% more CFM for every 10 feet of ductwork and 20-30% more for every 90-degree bend. If your ductwork looks like a pretzel, you’re in trouble.
• Duct Size: Your ductwork should be the same size as your hood’s exhaust collar. If it’s too small, you’re restricting airflow. If it’s too large, you lose velocity, and grease starts settling in the ducts (hello, fire hazard).
• Duct Material: Use galvanized steel or stainless steel for Type I hoods. Never use flexible ducting, it’s a grease trap waiting to happen.

I once had to troubleshoot a hood system where the CFM was spot-on on paper, but the kitchen was still a smoke show. Turns out, the ductwork had three 90-degree bends and a section that was half the size it should’ve been. Always inspect the ductwork before finalizing your CFM-it’s the difference between a system that works and one that doesn’t.

4. Altitude: The High-Altitude CFM Adjustment You’re Probably Forgetting

If you’re in Denver, Albuquerque, or any other high-altitude city, listen up. Air is thinner at higher elevations, which means your hood system has to work harder to move the same volume of air. Here’s how to adjust:

• For every 1,000 feet above sea level, add 3-5% more CFM.
• At 5,000 feet, you’re looking at 15-25% more CFM than the standard calculation.

I learned this the hard way when I installed a hood system in a Denver restaurant. The CFM was perfect for sea level, but at 5,280 feet? The kitchen was a disaster. The staff was constantly wiping down surfaces, and the health inspector nearly failed them. Always check your elevation-it’s an easy fix that most people overlook.

The 3 Methods for Calculating CFM (And When to Use Each)

Method 1: The Linear Foot Method (Quick and Dirty, But Effective)

This is the simplest way to calculate CFM, and it’s perfect for quick estimates or when you’re working with standard setups. Here’s how it works:

1. Measure the length of your hood in feet (e.g., a 10-foot hood).
2. Multiply that length by a CFM per linear foot factor based on your equipment type:

• High-grease equipment (charbroilers, fryers): 100-150 CFM/ft
• Medium-grease equipment (ovens, ranges): 80-120 CFM/ft
• Low-grease/steam equipment (steam tables, dishwashers): 50-100 CFM/ft

Adjust for hood style and ductwork (see previous sections).

Example: You’ve got a 12-foot wall-mounted hood over a charbroiler. Using the high-grease factor:

12 ft × 125 CFM/ft = 1,500 CFM.

Now, let’s say your ductwork has two 90-degree bends. Add 20% for each bend (40% total):

1,500 CFM × 1.4 = 2,100 CFM.

Easy, right? But here’s the catch: this method assumes your hood is perfectly sized for your equipment. If your hood is way bigger than your appliances, you’re over-ventilating. If it’s too small, you’re under-ventilating. So, when should you use this method?

• You’re doing a quick estimate for a standard kitchen.
• You don’t have time for complex calculations (e.g., you’re on a tight deadline).
• Your hood and equipment are proportionally sized (e.g., a 10-foot hood over a 10-foot line of equipment).

When should you ot use this method? If your setup is non-standard (e.g., a tiny hood over a giant charbroiler or an island hood in a large open space). For those, you’ll need Method 2 or 3.

Method 2: The Appliance Input Method (For the Detail-Oriented)

This method is more precise because it calculates CFM based on the actual heat output of your appliances. It’s a bit more work, but it’s worth it for complex setups. Here’s how it works:

1. Find the BTU (British Thermal Unit) input for each appliance. This is usually listed on the appliance’s spec sheet or nameplate. If you can’t find it, here are some averages:

• Charbroiler: 30,000-50,000 BTU/hr
• Griddle: 20,000-40,000 BTU/hr
• Fryer: 15,000-30,000 BTU/hr
• Oven: 25,000-50,000 BTU/hr
• Steam table: 5,000-10,000 BTU/hr

Add up the BTU inputs for all appliances under the hood.

Convert BTUs to CFM using this formula:

CFM = (Total BTU/hr × 0.0004719) ÷ 60

(The 0.0004719 factor converts BTUs to cubic feet, and the 60 converts hours to minutes.)

Adjust for hood style, ductwork, and altitude (same as Method 1).

Example: You’ve got a hood over a charbroiler (40,000 BTU/hr) and a griddle (30,000 BTU/hr). Total BTU input = 70,000 BTU/hr.

CFM = (70,000 × 0.0004719) ÷ 60 = 550 CFM.

Now, let’s say you’ve got a wall-mounted hood with 10 feet of ductwork and one 90-degree bend. Add 10% for the ductwork and 20% for the bend:

550 CFM × 1.3 = 715 CFM.

See how this gives you a more tailored CFM than the linear foot method? This is the way to go if:

• Your hood covers multiple types of equipment (e.g., a charbroiler and a fryer).
• You’re working with high-BTU appliances (like woks or wood-fired ovens).
• You want to optimize energy efficiency (because over-ventilating is expensive).

But here’s the downside: this method requires accurate BTU data. If you’re guessing at BTUs, you’re guessing at CFM. And if you’re working with older equipment that doesn’t have spec sheets? You might be better off with Method 1 or 3.

Method 3: The Capture and Containment Method (For the Perfectionists)

This is the most accurate (and most complex) method, and it’s what engineers use for large or custom setups. It’s overkill for most kitchens, but if you’re designing a high-end restaurant or a commercial kitchen with unique challenges, this is the way to go. Here’s how it works:

1. Determine the capture velocity: This is the speed at which air needs to move to capture contaminants. For most commercial kitchens, the standard is 50-100 feet per minute (FPM) at the hood opening. High-grease equipment needs higher velocities (75-100 FPM), while low-grease equipment can get away with 50-75 FPM.
2. Measure the hood opening area: Calculate the area of the hood’s opening in square feet. For a rectangular hood, this is length × width. For a canopy hood, it’s the area of the opening plus the overhang.
3. Calculate CFM: Multiply the capture velocity (in FPM) by the hood opening area (in square feet).

CFM = Capture Velocity (FPM) × Hood Opening Area (sq ft)

4. Adjust for hood style, ductwork, and altitude (same as before).

Example: You’ve got a 10-foot by 4-foot wall-mounted hood over a charbroiler. The hood has a 6-inch overhang on all sides, so the total opening area is:

(10 ft + 1 ft overhang) × (4 ft + 1 ft overhang) = 55 sq ft.

You’re using a capture velocity of 100 FPM (high-grease equipment):

CFM = 100 FPM × 55 sq ft = 5,500 CFM.

Now, let’s say your ductwork has 20 feet of length and two 90-degree bends. Add 20% for the ductwork and 40% for the bends:

5,500 CFM × 1.6 = 8,800 CFM.

Whoa, that’s a lot! But remember, this method is for large or complex setups. When should you use it?

• You’re designing a custom hood system (e.g., for a wood-fired pizza oven or a wok station).
• You’re working with on-standard equipment (e.g., a rotisserie or a smoker).
• You need to meet strict code requirements (e.g., for a hospital or school kitchen).

When should you ot use this method? If you’re working with a standard kitchen and don’t have time for complex calculations. For most setups, Method 1 or 2 will get you 90% of the way there.

Real-World Tweaks: What the Manuals Won’t Tell You

1. The Overhang Rule (And Why It’s a Game-Changer)

Here’s a pro tip that’ll save you a ton of headaches: your hood should overhang your equipment by at least 6 inches on all sides. Why? Because heat and grease don’t magically stop at the edge of your appliances. If your hood is the same size as your equipment, you’re missing a lot of contaminants.

I once saw a hood installed with zero overhang over a griddle. By the end of the first week, the wall behind the griddle was coated in grease. The fix? Extend the hood by 6 inches on each side. Problem solved. Always add overhang-it’s cheap insurance.

2. The Makeup Air Dilemma (And How to Avoid Negative Pressure)

Here’s something most people don’t think about: if you’re sucking air out of your kitchen, you need to replace it. If you don’t, you’ll create negative pressure, which can cause:

• Backdrafting (dangerous with gas appliances).
• Doors that are impossible to open (because the kitchen is sucking air from the dining room).
• HVAC systems that work overtime (hello, sky-high energy bills).

So, how do you calculate makeup air? It’s simple: your makeup air should equal 80-90% of your exhaust CFM. For example, if your hood system is pulling 2,000 CFM, you’ll need 1,600-1,800 CFM of makeup air.

Where does the makeup air come from? It can be supplied through:

• Dedicated makeup air units (the best option, these bring in tempered air to match your kitchen’s temperature).
• HVAC systems (if your HVAC is sized to handle the extra load).
• Passive vents (the cheapest option, but not ideal, these can bring in cold or hot air, making your kitchen uncomfortable).

I worked with a restaurant that skipped makeup air to save money. The result? The kitchen was so negative that the front door would slam shut on its own, and the staff complained about headaches from the poor air quality. Don’t skip makeup air-it’s not optional.

3. The Grease Filter Factor (And Why It’s Not Just About Fire Safety)

Grease filters aren’t just there to prevent fires, they also affect your CFM. Here’s why:

• Mesh filters: These are cheap and effective, but they create more resistance, which can reduce your CFM by 10-20%. If you’re using mesh filters, you’ll need to bump up your CFM to compensate.
• Baffle filters: These are the gold standard. They’re more expensive, but they create less resistance and are easier to clean. You won’t need to adjust your CFM as much with baffle filters.

I once had a client who insisted on using mesh filters to save money. The hood’s CFM was perfect on paper, but in reality, it couldn’t keep up because the filters were choking the airflow. We swapped them out for baffle filters, and the problem disappeared. Invest in good filters-they pay for themselves in efficiency.

4. The Seasonal Adjustment (Because Winter and Summer Aren’t the Same)

Here’s a weird one: your CFM needs can change with the seasons. Why? Because hot air rises faster than cold air. In the summer, your hood system might struggle to keep up because the hot air is escaping faster. In the winter, it might be overkill because the cold air is denser and easier to capture.

So, what do you do? If you’re in a climate with extreme seasons, consider:

• Variable speed fans: These let you adjust CFM based on the season (or even the time of day).
• Seasonal CFM calculations: Calculate your CFM for both summer and winter conditions, then split the difference. For example, if you need 2,000 CFM in the summer and 1,500 CFM in the winter, aim for 1,750 CFM.

I installed a hood system in a Chicago restaurant that worked perfectly in the winter but failed in the summer. The fix? A variable speed fan that adjusted CFM based on the kitchen’s temperature. Think about seasons-it’s a small tweak that makes a big difference.

Common Mistakes (And How to Avoid Them)

1. Ignoring the “Rule of Thirds” for Hood Placement

The “rule of thirds” is a simple but often overlooked guideline for hood placement. Here’s how it works:

• The bottom of the hood should be no more than 1/3 of the hood’s height above the cooking surface. For example, if your hood is 3 feet tall, the bottom should be no more than 1 foot above the equipment.
• The top of the hood should extend at least 1/3 of the hood’s height above the cooking surface. So, if your hood is 3 feet tall, the top should be at least 1 foot above the equipment.

Why does this matter? Because if your hood is too high, it won’t capture contaminants effectively. If it’s too low, it’ll interfere with your staff’s workflow. I’ve seen hoods installed 6 feet above a griddle (way too high) and 6 inches above a steam table (way too low). Follow the rule of thirds-it’s a simple way to get your hood placement right.

2. Forgetting to Factor in Appliance Diversity

Here’s a mistake I see all the time: someone calculates CFM based on the biggest appliance under the hood and ignores the rest. For example, they’ll size a hood for a charbroiler but forget about the fryer next to it. The result? A hood that can’t handle the combined load.

How do you avoid this? Add up the CFM requirements for all appliances under the hood, then adjust for overlap. For example, if you’ve got a charbroiler (1,500 CFM) and a fryer (1,000 CFM) under the same hood, you don’t need 2,500 CFM, you might get away with 1,800-2,000 CFM because the hood can capture some of the overlap.

I once worked with a kitchen that had a hood sized for a single griddle, but they added a fryer later. The hood couldn’t keep up, and the kitchen was a mess. Always plan for the worst-case scenario-your future self will thank you.

3. Skimping on Duct Insulation (Because Condensation Is the Enemy)

If your ductwork runs through unconditioned spaces (like an attic or crawl space), insulate it. Why? Because if the ductwork gets too cold, condensation will form inside, and that condensation will mix with grease to create a sludge that clogs your ducts. Trust me, you do ot want to deal with that.

How do you insulate ductwork? Use fiberglass or foam insulation with a vapor barrier. And make sure it’s rated for grease, regular insulation won’t cut it.

I’ve seen ductwork so clogged with grease sludge that it had to be completely replaced. Insulate your ducts-it’s a small cost that prevents a big headache.

4. Not Testing Your CFM (Because Assumptions Are Dangerous)

Here’s the thing: calculating CFM is only half the battle. The other half? Testing it to make sure it’s working. How do you do that? With a balometer or anemometer-tools that measure airflow. Here’s what to look for:

• Capture velocity: Use an anemometer to measure the speed of air at the hood opening. It should be 50-100 FPM (depending on your equipment).
• Exhaust flow: Use a balometer to measure the total CFM at the exhaust collar. It should match your calculation (within 10%).

I once calculated a perfect CFM for a client, but when we tested it, the airflow was 30% lower than expected. Turns out, the ductwork had a hidden kink. Always test your CFM-it’s the only way to know for sure.

Putting It All Together: A Step-by-Step CFM Calculation

Alright, let’s walk through a real-world CFM calculation step by step. We’ll use a hypothetical kitchen with the following setup:

• A 12-foot wall-mounted Type I hood over a charbroiler (40,000 BTU/hr) and a griddle (30,000 BTU/hr).
• Ductwork: 20 feet of length with two 90-degree bends.
• Location: Nashville, TN (sea level).

Step 1: Choose Your Method

Since we’ve got multiple appliances with known BTU inputs, we’ll use Method 2 (the Appliance Input Method).

Step 2: Calculate Total BTU Input

Charbroiler: 40,000 BTU/hr

Griddle: 30,000 BTU/hr

Total BTU input = 70,000 BTU/hr

Step 3: Convert BTUs to CFM

Use the formula: CFM = (Total BTU/hr × 0.0004719) ÷ 60

CFM = (70,000 × 0.0004719) ÷ 60 = 550 CFM

Step 4: Adjust for Hood Style

We’re using a wall-mounted hood, so no adjustment is needed for hood style (island hoods would require 15-30% more CFM).

Step 5: Adjust for Ductwork

Add 10% for 20 feet of ductwork and 20% for each 90-degree bend (40% total):

550 CFM × 1.5 = 825 CFM

Step 6: Check Against the Linear Foot Method

Just to be safe, let’s see what the linear foot method gives us. We’ve got a 12-foot hood over high-grease equipment (125 CFM/ft):

12 ft × 125 CFM/ft = 1,500 CFM

Adjust for ductwork (same as before):

1,500 CFM × 1.5 = 2,250 CFM

Hmm, that’s a big difference. Why? Because the linear foot method assumes the hood is perfectly sized for the equipment, but in this case, the hood is much larger than the appliances. The Appliance Input Method is more accurate here.

Step 7: Final CFM

Based on the Appliance Input Method, we’re going with 825 CFM. But let’s round up to 900 CFM to account for any inefficiencies (better safe than sorry).

Step 8: Add Makeup Air

We’ll need 80-90% of 900 CFM for makeup air:

900 CFM × 0.8 = 720 CFM

So, we’ll need a makeup air system that can supply at least 720 CFM.

Step 9: Test and Adjust

Once the system is installed, we’ll test the CFM with a balometer to make sure it’s hitting 900 CFM. If not, we’ll adjust the fan speed or check for ductwork issues.

Final Thoughts: CFM Isn’t Just a Number, It’s Your Kitchen’s Lifeline

Look, I get it. Calculating CFM can feel like one of those tedious, overly technical tasks that you’d rather ignore. But here’s the truth: your hood system is the unsung hero of your kitchen. It keeps the air clean, the staff comfortable, and the health inspector happy. And getting your CFM right? That’s how you make sure it does its job.

So, what’s the takeaway? Here’s your CFM cheat sheet:

• Match your CFM to your equipment-don’t guess.
• Adjust for hood style, ductwork, and altitude-these variables matter.
• Test your CFM-assumptions are dangerous.
• Don’t forget makeup air-negative pressure is a nightmare.
• Overestimate slightly-it’s better to have too much CFM than too little.

And if you’re still feeling overwhelmed? Start with the linear foot method for a quick estimate, then refine it with the Appliance Input Method if you’ve got the data. The key is to get in the ballpark and adjust as needed.

Now, I’ve got a question for you: What’s the biggest CFM mistake you’ve ever made (or seen)? Drop it in the comments, I’m always curious to hear war stories from the trenches. And if you’re staring at a hood system right now, wondering if it’s up to snuff, go grab a tape measure and a calculator. Your kitchen (and your staff) will thank you.

FAQ: Your Burning CFM Questions, Answered

Q: How do I know if my current hood system has enough CFM?
A: The easiest way is to test the capture velocity at the hood opening with an anemometer. It should be 50-100 FPM (depending on your equipment). If it’s lower, your CFM is too low. You can also look for signs like smoke lingering in the air, grease buildup on surfaces, or staff complaining about poor air quality. If you’re seeing any of these, it’s time to recalculate and adjust.

Q: Can I use the same CFM calculation for a Type I and Type II hood?
A: Nope! Type I hoods (for grease-laden vapors) need more CFM than Type II hoods (for steam and heat). For example, a Type I hood over a charbroiler might need 100-150 CFM per linear foot, while a Type II hood over a steam table might only need 50-100 CFM per linear foot. Always match your CFM to the hood type and the equipment it’s serving.

Q: What’s the biggest factor that affects CFM?
A: Hands down, it’s the type of cooking equipment. High-grease appliances like charbroilers and fryers produce way more contaminants than low-grease appliances like steam tables or dishwashers. That’s why a hood over a charbroiler needs almost twice the CFM of a hood over a pasta cooker. Other big factors include hood style (island hoods need more CFM than wall-mounted hoods), ductwork (long or bendy ducts reduce CFM), and altitude (higher elevations require more CFM).

Q: Do I need to hire a professional to calculate CFM, or can I do it myself?
A: You can absolutely do it yourself-if you’re comfortable with basic math and understand the variables we’ve covered. The methods in this guide (linear foot, appliance input, and capture and containment) are all doable with a calculator and a tape measure. That said, if you’re working with a complex or custom setup (like a wood-fired oven or a large open kitchen), it might be worth hiring an HVAC engineer or a kitchen ventilation specialist. They’ll have the tools and expertise to fine-tune your CFM and ensure everything meets code. For most standard kitchens, though, you can handle it yourself, just double-check your work!

@article{how-to-calculate-cfm-for-your-commercial-hood-system-a-no-nonsense-guide-for-kitchen-pros,
    title   = {How to Calculate CFM for Your Commercial Hood System: A No-Nonsense Guide for Kitchen Pros},
    author  = {Chef's icon},
    year    = {2026},
    journal = {Chef's Icon},
    url     = {https://chefsicon.com/how-to-calculate-cfm-for-your-commercial-hood-system/}
}