V. Exhaust Requirements
The exhaust ducting for the Heller oven should be designed and installed by a qualified HVAC
(heating, ventilation, and air conditioning) technician capable of calculating air flow from suction
blowers and flow losses in upstream and downstream ducting. Refer to enclosed facility install
drawing for appropriate exhaust requirements.
The latitude for exhaust airflow is quite wide and tolerant of variations in exhaust blower
efficiency. As a general guideline, exhaust volume is insufficient if an odor comes out of the oven. If
the heaters in the reflow zones are operating above 70% power during production processing, there
is too much exhaust flow.
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