What is the maximum allowable carbon monoxide (CO) monitor reading that permits an audit to continue upon entering a home?

The maximum allowable carbon monoxide (CO) monitor reading that permits an audit to continue upon entering a home is 70 ppm (parts per million). When conducting home energy audits, it's essential to ensure the safety of both the auditor and the occupants. A reading of 70 ppm signifies a level of carbon monoxide that is concerning, but it is still below the threshold that would necessitate an immediate evacuation of the premises or termination of the audit.

Higher CO levels can indicate unsafe indoor air quality, which poses risks of poisoning or serious health issues. Values above this threshold could lead to more severe health risks and require further investigation or immediate action to mitigate the risk.

If the reading is at or below 70 ppm, it indicates that while caution is needed, the immediate circumstances may allow the audit to continue, provided that proper safety protocols are followed. This understanding is key for building analysts to ensure they are working within safe limits while tending to their assessments and assisting homeowners.