Cooking processes will generate emissions, products of combustion, heat etc., all of which are required to be kept within safe environmental limits by operation of a ventilation system. If this system fails or is not working correctly, the environment may become unsafe or unfit to work in.
An interlock device must be installed between a mechanical ventilation system and any gas appliance, so that, in the event of a system failure, the gas supply will be automatically shut off. Installation of manual bypasses to such interlock systems is not permitted.
DNM can help with proactive preventative maintenance and cleaning, which will help avoid appliances shutting down (often when you need them the most) due to failure of the ventilation system.