An oven used to demoisturize the boards would typically operate in the 250 F temperature range. Some nonmetallic materials will off-gas at that temperature, but it will not be high enough to "melt lead".
More than likely, a local code will require ventilation of the oven at a minimal flow rate of 50 CFM. If it were my oven, I would ventilate it. This will also reduce the chance of condensation of the off-gassed products on the cooler parts of the oven, such as a window.
Rick Perkins
President
Chem Logic
Rick Perkins is a chemical engineer with more than 33 years of Materials & Processes experience. He has worked with Honeywell Aerospace in high-reliability manufacturing, as well as with several oil-field manufacturing companies. He also has a good understanding of environmental, health, and safety regulations.
Best practice would be to have the oven vented to a scrubber or to the outside. There can be residual solvents, flux residues etc. present on a board (especially once it has gone through some assembly processes) that can be potentially harmful and/ or irritating when exposed to heat.
Kevin Beattie
Quality Manager
Sunstone Circuits
Kevin is part of the Sunstone Management team. In his role as Quality Assurance Manager, Beattie’s 25+ year background in Printed Circuit Board manufacturing is a tremendous asset to the Sunstone team. In addition, he brings valuable experience from his previous roles in the following areas: process engineering, new process introductions, support of nearly every manufacturing process, and extensive knowledge of Continuous Improvement, ISO, IPC, and various other industry requirements.
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