The type of hood your commercial kitchen needs depends on the cooking equipment you use. Type I hoods are required for appliances that produce grease-laden vapors, including fryers, griddles, charbroilers, and woks. Type II hoods are designed for equipment that generates only heat, moisture, or steam without grease, such as ovens, steamers, and dishwashers. There is no one-size-fits-all solution because the right hood depends on your equipment, kitchen layout, and local code requirements. Business owners planning a new commercial kitchen in Clayton, Delaware, often begin with Commercial Hood Installation in Clayton, where a licensed hood fabricator can review the equipment list and ensure the system meets NFPA 96 and International Mechanical Code requirements before construction begins.
This is one of those questions that sounds simple but actually depends on several moving parts. Getting the hood type wrong, or assuming one hood can cover equipment it was never designed for, is a common reason kitchens run into problems during permitting and inspection.
Why the Right Hood Type Depends on Your Equipment
The biggest factor in choosing a hood isn’t the size of your kitchen or how many burners you’re running. It’s whether your cooking equipment produces grease laden vapor. That distinction is what code officials are actually looking at, because it determines the fire risk the ventilation system has to manage. A kitchen running a deep fryer has a very different exhaust requirement than a kitchen running only convection ovens, even if both spaces are roughly the same size.
This is why a generic answer to “what hood do I need” rarely holds up. The honest answer is that it depends on the equipment underneath the hood, and that has to be evaluated equipment by equipment rather than guessed at from a general kitchen layout. Two kitchens can look nearly identical from the dining room and still require completely different hood systems once you look at what’s actually cooking in the back.
Type I Hoods: For Grease Producing Equipment
Type I hoods are designed for cooking equipment that releases grease laden vapor into the air. Fryers, griddles, charbroilers, ranges, and woks all fall into this category. Because this equipment creates a documented fire risk, Type I hoods are required under NFPA 96 to include grease filtration, a compliant exhaust path, and an integrated fire suppression system tied into the hood and the fuel or electrical shutoffs for the equipment below it.
If your kitchen includes any equipment in this category, a Type I hood isn’t optional. This is also where licensed fabrication matters most, since the hood, ductwork, and suppression system all have to be engineered together as one functioning system rather than installed as separate pieces.
Type II Hoods: For Heat and Steam Without Grease
Type II hoods are used over equipment that produces heat, steam, or odor but does not release grease into the air. Ovens, steamers, dishwashers, and some types of warming equipment typically fall into this category. Because there’s no grease laden vapor to manage, Type II hoods generally don’t require the same fire suppression integration that Type I hoods do, although local code requirements still apply and should be confirmed before installation.
It’s worth noting that some equipment people assume is “low risk” actually produces enough grease to require a Type I hood anyway. This is exactly the kind of detail that depends on the specific equipment model and how it’s used, not a general assumption about the type of food being cooked.
Why Mixed Equipment Lines Need Careful Planning
Most commercial kitchens don’t run a single type of equipment. A kitchen might have a fryer, a flat top, and an oven all positioned near each other, which means the hood system has to account for both grease producing and non grease producing equipment in the same space. In some cases, this means installing separate Type I and Type II hood sections, and in other cases it means designing the entire hood as Type I to cover the highest risk equipment in that area.
This is one of the clearest examples of why hood selection can’t be reduced to a simple checklist. The right configuration depends on exactly which pieces of equipment are grouped together, how they’re spaced, and what the local code official will require for that specific layout.
Menu changes add another layer to this. A kitchen that opens with a simple oven and steamer setup might add a fryer or charbroiler a year later as the menu grows, and at that point the original Type II hood is no longer adequate for what’s cooking underneath it. This is a common gap that shows up during routine inspections or when a kitchen tries to add equipment without revisiting the ventilation system first, and it’s one more reason hood planning should account for where the kitchen is headed, not just what it’s running on day one.
Why a Generic Answer Doesn’t Work Here
It would be easy to publish a simple chart that says “fryers need this, ovens need that,” and call it a day. The problem is that real kitchens rarely match a chart exactly. Equipment gets swapped, menus change, and kitchens get renovated without always updating the ventilation to match. A hood that was correctly sized for the original equipment lineup can become inadequate or even a code violation once new equipment is added, which is why hood selection has to be confirmed against the actual equipment in place, not assumed from a general category.
This is also why working with a fabricator rather than relying on general guidance matters. A fabricator who custom builds the system around your specific kitchen can catch these mismatches before installation, rather than after an inspector flags them.
Why Licensed Fabrication Matters
Choosing the right hood type is only the first decision. The hood still has to be sized correctly, fabricated to handle the equipment’s heat and grease load, and integrated with ductwork, makeup air, and fire suppression as a complete system. This is specialized work that falls outside general HVAC licensing in many states, including Maryland’s HVACR licensing law, which treats commercial hood system work as its own category separate from general heating and cooling systems.
Since 1980, CRS Hoods has installed more than 10,000 commercial kitchen exhaust systems across Pennsylvania, New Jersey, Delaware, and Maryland, with systems that consistently pass inspection on the first attempt. CRS Hoods approaches every kitchen as a custom fabrication project, evaluating the actual equipment lineup before recommending a Type I or Type II configuration, rather than applying a standard hood to a kitchen it wasn’t designed for.
Final Thoughts
There’s no single answer to what type of hood a commercial kitchen needs, because the right choice depends entirely on the equipment producing grease, heat, or steam underneath it. Type I and Type II hoods exist to address very different fire risks, and getting that distinction wrong can stall a kitchen’s opening or create a real safety gap. Working through your equipment lineup with a licensed fabricator before construction begins is the most reliable way to get this decision right the first time.
Frequently Asked Questions
How do I know if I need a Type I or Type II hood?
It depends on whether your cooking equipment produces grease laden vapor. Fryers, griddles, charbroilers, and similar equipment require a Type I hood with fire suppression. Equipment that only produces heat or steam, like ovens and steamers, typically falls under Type II, though this should be confirmed for the specific equipment model.
Can one hood cover both grease producing and non grease producing equipment?
In some layouts, yes, but the hood generally has to be designed as Type I if any grease producing equipment falls within its capture area. The exact configuration depends on how the equipment is grouped and what local code requires for that layout.
Does a Type II hood need a fire suppression system?
Generally no, since Type II hoods are used over equipment that doesn’t produce grease laden vapor, but local code requirements can vary, so this should be confirmed with a licensed fabricator and local code official before installation.
What happens if the wrong hood type is installed for the equipment in use?
An improperly matched hood is likely to fail inspection and may not provide adequate fire protection for the actual cooking equipment in the kitchen, which can lead to costly rework or delays in opening.
Who decides what hood type a kitchen needs?
The hood type is determined by the cooking equipment in use and verified against NFPA 96 and the International Mechanical Code, typically by a licensed hood fabricator working with the local code official during the permitting process.
