All fans operational and rotations visually verified by observation of the arrows stamped on them.A performance evaluation of the system can be performed only if all the following items have been completed:.(i.e., excessive negative pressure, excessive quantities of hot or cold air in the kitchen, etc.). The prime objective of balancing is to insure that each hood will capture all the contaminants producedīy the equipment it covers without causing undesirable conditions in the kitchen.Reading should be taken on the motor to make certain it is not overloaded. When fan pulleys are adjusted, belts should then be re-checked for correct tension and an amperage.Perforated supply plenums discharging air around the hood should be set to the designed discharge velocity.This willĪchieve the most efficient contaminant capture. In the center and several ovens on the ends, the risers should be evenly balanced. For example, if a hood with multiple make-up air risers has a charbroiler A hood with multiple make-up air risers should be balanced according to the cooking.If smoke goes out of the hood, adjustment is needed. The simplest means of doing the performance test is using a T-T Puffer fromĪctivate the puffer and use it to trace effluent around the entire perimeter of the hood,Įmitting smoke a few inches under the lower edges of the hood. Smoke or steam produced by actual or simulatedĬooking, such as with smoke candles, smoke puffers, etc." This field test shall be conducted withĪll appliances under the hood at operating temperatures.Ĭapture and containment shall be verified visually by observing Holder shall verify capture and containment performance of Holder shall furnish the necessary test equipment and devicesĥ07.16.1 Capture and containment test. The test shall verify the rate of exhaust airflow requiredīy Section 507.13, makeup airflow required by Sectionĥ08, and proper operation as specified in this chapter. Of a ventilation system serving commercial cookingĪppliances. Upon completion and before final approval of the installation Which is currently effective in most parts of the U.S., are as follows: Outside air will in some way affect the operation of a system, most commonly that affect is a negative one.Ī test and balance, as well as the simple performance test in International Mechanical Code section 507.16.1 shouldīe included in all jobs, as code inspectors are increasingly enforcing these requirements. Any change in the pressure differential between inside and Maintain a constant pressure in the space. In any building where effluent and hot air is removed, that mass of air must be replaced to The testing and balancing of a system is necessary to insure proper and efficient operation of that system as
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