Kitchen Exhaust Duct Velocity

Commercial kitchen exhaust hoods shall comply with the.

Kitchen exhaust duct velocity. Air flow and velocity due to natural draft air flow volume and velocity due to stack or flue effect caused by indoor hot and outdoor. Without adequate ventilation and an ample supply of clean makeup air no kitchen will operate efficiently. Commercial kitchen grease ducts constructed in accordance with section 506 3 1 shall be enclosed by a field applied grease duct enclosure that is a listed and labeled material. If the effluent emis sions and exhaust duct size remains the same the result will not only be a decrease in exhaust velocity but a corresponding in crease in particle concentration.

Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more. Test results duct velocity 0 0 0 2 0 4 0 6 0 8 1 0 1 2 1 4 1 6 1 8 deposition flux µg ft min. Air ducts friction loss diagram a major loss diagram for air ducts imperial units ranging 10 100 000 cfm. The average ventilation velocity at the face of the enclosure shall be not less than 200 feet per minute.

Kitchen exhaust ductwork construction of 1 2mm or 0 9 stainless as per as1668 standard with seams sealed to prevent grease leakage. Air ducts velocity diagram air flow volume duct size velocity and dynamic pressure. A grease duct is a duct that is connected to the kitchen exhaust hood and is specifically designed to vent grease smoke and other harmful contaminants from commercial cooking equipment to the outside of a building. Air return intakes sizes and capacities size and capacity of air return intake.

Kitchen exhaust grease duct. Fundamentals of kitchen ventilation a. Chapter 5 exhaust systems 501 general. Factory built commercial kitchen grease ducts listed and labeled in accordance with ul 1978 and installed in accordance with section 304 1.

For instance an appliance may be found to operate effectively with reduced exhaust volumetric flow rate while maintaining capture and containment. Course content introduction ventilation is the single most important factor in the design construction and operation of commercial kitchens. A 8 2 1 1 ashrae research project 1033 rp final report effects of air velocity on grease deposition in exhaust ductwork documented that grease deposition is reduced as air velocity is reduced primarily due to less turbulence at the duct surface. 16 gage or stainless steel not less than 0 0450 inch 1 14 mm no.

Duct access panels every 3 metres of straight duct and change of direction. 18 gage in thickness. 500 1000 1500 2000 mean duct velocity fpm bottom. Ashrae energy efficient kitchen design author.

Spigot connections at 5 to 7m s.