4.6.2. Stack Termination (NFPA 211 - Section 4) A metal chimney for an oven operating up to 500°F should extend at least three feet above the highest point where it passes through the roof and at least two feet above any portion of the building within ten feet laterally. For those ovens operating at temperatures greater than 500°F but less than 900°F, the chimney should extend at least ten feet above the highest point where it passes through the roof and at least ten feet above any portion of the building within 25 feet laterally. 4.6.3. Stack Clearances (NFPA 211 - Section 4) A metal chimney should have a clearance of not less than 24” from any wooden construction or combustible material. A metal chimney shall have a clearance no less than 2” from any non-combustible structure. A metal chimney erected on the outside of a building shall not be installed any closer than 24” to any door, window or walkway. Consult NFPA 211, Section 4 for details on installation of a chimney through any story of The exhaust fan static restriction was calculated using 20-foot tall, straight vertical exhaust stacks with no bends or turns. Any bends or turns in the exhaust stack may restrict the exhaust, causing a reduction in the maximum gallons of solvent that the oven can safely handle. Ensure that the oven was designed to operate with the needed ductwork configuration onsite before operating the oven. 5.Oven Component Installation This section will cover a detailed step by st ep of the diff erent components needed to be installed to make build an assembled oven. The following information is broken down by section: a building or a combustible roof. 4.6.4. General Requirements
> Process 1 – Floor Assembly > Process 2 – Wall Assembly
• 2(a) – Ovens WITHOUT Internal Support Structure • 2(b) – Ovens WITH Internal Support Structure
> Process 3 – Door Jamb and Door Header Assembly > Process 4 - Roof Assembly
> Process 5 – Heater Box Installation (Floor Mounted) > Process 6 – Heater Box Installation (Roof Mounted) > Process 7 – Flashing Walls and Roof > Process 8 – Recirculation Ductwork Installation > Process 9 – Product Door Opening Support Structure Assembly > Process 10 – Product Door Assembly
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