Clarification on Cal/OSHA Indoor Heat Illness Regulation Compliance
Hi Team,
I hope this message finds you well.
I’m reaching out for some clarification regarding the new California OSHA regulation for indoor heat illness prevention, specified under California Code of Regulations, Title 8, section 3396. As we work to ensure compliance, I have a question about the types of thermometers we can use to measure indoor temperatures.
While the regulation highlights the use of Wet Bulb Globe Temperature (WBGT) devices for their comprehensive assessment of heat stress (measuring temperature, relative humidity, air velocity, and radiant heat), I understand that the cost and complexity of WBGT devices might pose challenges, especially for small businesses. The regulation seems to have considered and rejected the mandatory use of WBGT devices due to these concerns.
Given this context, I’m looking to understand if a standard thermostat can be used instead of a WBGT or other complex devices to measure indoor temperature effectively. Are there any specific conditions or exceptions that allow for the use of simpler devices under this regulation?
Additionally, if anyone has recommendations for thermometer options that are compliant and effective for this purpose, I would greatly appreciate your input.
Thank you.
Comments (2)
Although I love to make short visits to CA I don't work there, nor would l like to. But if I were in your shoes I sure would not hesitate to call Cal OSHA and ask them!
Document your call and their answer. Even it is just an email to yourself or post it here. Might even be a FAQ of their website.
I am missing something. I don't see any mention of WBGT in the regulation. In fact, the regulation actually says radiant heat is not included in the heat index.
The regulation states that you must use temperature or heat index, whichever is higher. The good thing about California in the summer is that the air is so dry that ambient temperatures and heat index are usually the same.
As long as know the temperature and relative humidity, you can use the chart in Appendix A to calculate the heat index.