Do you need a Test Tank for a Denlar installation?
You may have heard conflicting information—some say a discharge or puff test is always required, while others believe that UL300A standards eliminate the need. The reality? The requirement for a field test depends entirely on your local Authority Having Jurisdiction (AHJ) and the inspector overseeing your project.
Denlar’s D1000 Series hoods meet all UL300A standards—the first and only mechanical fail-safe range hood designed to protect residential-style appliances used in limited commercial and nonprofit settings. This standard provides an important level of safety assurance, but local code officials still have final authority.
When should you plan for a Test Tank?
If your project is in an area where the AHJ typically requires a field discharge (or “puff”) test for the fire suppression system, you should plan ahead:
SUBMITTAL: https://denlarhoods.com/wp-content/uploads/2024/10/denlar_hoods_test_tank_e.pdf
- Offer the test tank as an optional add-on in your quotes (excluding the physical test and permitting) so you’re covered on every project without unnecessary cost.
- Or, partner with a licensed local fire suppression contractor who can manage the full cost of the test, permitting, and compliance requirements.
Either way, Denlar recommends clarifying expectations with the AHJ early in the project to avoid delays.
How do I identify the AHJ?
Because AHJs vary based on your project’s location, type of occupancy, and local codes, there’s no single national list. However, here’s where to start:
✅ Contact your local fire department or building department — They often serve as the AHJ or can direct you to the right authority.
✅ State Fire Marshal Offices — These offices can provide guidance and connect you to regional or local code officials:
- NFPA State Fire Marshal Directory
- ICC Government Member Directory
✅ General tip: Always verify with the local permitting office at the city or county level — that’s often where the AHJ authority resides.
State Fire Marshal Offices — Where to Start
Here are the state-level resources to help identify the AHJ:
State | Fire Marshal Website |
Alabama | |
Alaska | |
Arizona | |
Arkansas | |
California | |
Colorado | |
Connecticut | https://portal.ct.gov/DESPP/Division-of-State-Police/Office-of-State-Fire-Marshal |
Delaware | |
Florida | |
Georgia | |
Hawaii | |
Idaho | |
Illinois | |
Indiana | |
Iowa | |
Kansas | |
Kentucky | |
Louisiana | |
Maine | |
Maryland | https://mdsp.maryland.gov/Organization/Pages/StateFireMarshal.aspx |
Massachusetts | |
Michigan | |
Minnesota | |
Mississippi | |
Missouri | |
Montana | |
Nebraska | |
Nevada | |
New Hampshire | |
New Jersey | |
New Mexico | |
New York | |
North Carolina | |
North Dakota | |
Ohio | https://com.ohio.gov/divisions-and-programs/state-fire-marshal |
Oklahoma | |
Oregon | |
Pennsylvania | |
Rhode Island | |
South Carolina | |
South Dakota | |
Tennessee | |
Texas | |
Utah | |
Vermont | |
Virginia | |
Washington | |
West Virginia | |
Wisconsin | https://dsps.wi.gov/Pages/Programs/FirePrevention/default.aspx |
Wyoming |
The bottom line
Best practice: Before quoting or installing, confirm field test requirements with the AHJ for that specific location. Offering a flexible solution — whether that’s an optional test tank or partnering with a local suppression contractor — ensures compliance and keeps your project on track.