What is the minimum exhaust ventilation capacity required if carbon monoxide is greater than 300 ppm following servicing?

The minimum exhaust ventilation capacity required when carbon monoxide levels exceed 300 ppm following servicing is established to ensure adequate removal of harmful gases from the environment. A continuous ventilation rate of 25 cubic feet per minute (CFM) is deemed effective in maintaining air quality and reducing the risks associated with elevated carbon monoxide levels.

This standard is based on safety protocols that prioritize the health of occupants by ensuring that any potentially lethal concentrations of carbon monoxide can be effectively diluted and removed. Continuous ventilation at 25 CFM allows for a steady flow of fresh air which helps mitigate the risks associated with this gas, thereby protecting individuals from its toxic effects.

While some other options may suggest varying capacities for intermittent or lower continuous ventilation, the context of a carbon monoxide reading above 300 ppm necessitates a robust and continuous response. This helps to ensure that the environment remains safe until further remedial actions can be taken.