The hood and duct “system” consists of the hood, the duct, the exhaust fan, grease-removal
devices and the fire suppression system. These are some answers to common questions regarding the Hood and Duct installation process in the Village of Mundelein.

Do all new Hood and Duct systems need to be UL 300 compliant?

 
What information do I need to provide the Fire Prevention Bureau prior to installation?
 

What do I need to do after the Hood and Duct system has been installed?

 
Does the Hood and Duct system need to be connected to the alarm system?

 
Were should I install the Pull Station to manually activate the system?
 

Are there any special considerations to be aware of if the system is activated?

Do all new Hood and Duct systems need to be UL 300 compliant?

Yes, all installed systems shall be UL 300 compliant. As of January 1st 2010, The State of Illinois requires all new and existing Hood and Duct systems to be UL 300 compliant.

UL 300 is a test standard, which tests pre-engineered fire extinguishing systems for protection of
restaurant cooking areas. This includes exhaust hoods, plenums, and ducts; and cooking appliances such as deep fat fryers, griddles, range tops, woks, upright broilers, and various types of char-broilers.

 
In addition to fire extinguishing tests, splash tests are conducted to ensure that the operation of the
extinguishing system will not splash burning grease. Such splashing could result in spreading the fire
and/or injuring an operator trying to manually extinguish the fire.

The test conditions under UL 300 are intended to more closely resemble actual field conditions and the
hazards presented by “new” trends in cooking equipment:

• The deep fat fryer test appliance was changed from a fabricated pan (to simulate a fryer) to an
  actual commercial fryer with specified heating and cooling rates.
• The one-minute pre-burn after auto-ignition was changed to a two minute pre-burn for the deep fat
  fryer and other similar fire risks.
• The appliance “fuel-off” condition during pre-burn was changed to an appliance “fuel-on”condition.
• A minimum grease auto-ignition temperature of 685°F (363°C) was added.

What information do I need to provide the Fire Prevention Bureau prior to installation?
Plans with cut sheets shall be presented for review prior to installation of the system.

What do I need to do after the Hood and Duct system has been installed?

The Mundelein Fire Department requires you to contact the Fire Prevention Bureau, to witness
the testing of the system after completion of the install.

Does the Hood and Duct system need to be connected to the alarm system?

Yes, the Hood and Duct System shall be connected to the fire alarm system if the occupancy is
equipped with one.
 

Were should I install the Pull Station to manually activate the system?
A Pull station shall be within 10’ of the Hood and Duct and in the direction of egress.
 

Are there any special considerations to be aware of if the system is activated?

In the event of a Hood and Duct system activation, the gas and any electrical outlets under the
hoods shall turn off.