The Smoke Pen emits test smoke when and where it is needed, says the company. To use, insert a patented smoke-emitting wick into the pen and adjust the wick to provide 3/8 inch of exposed wick. Next, ...
Duct smoke detector maintenance requirements are not included in the NFPA standard that covers HVAC systems (NFPA 90A or 90B); however, the International Code Council’s 2015 Mechanical Code does state ...
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