What is the minimum height for letters on a warning notice according to sauna heater regulations?

In sauna heater regulations, the minimum height for letters on a warning notice is set to ensure clarity and visibility to promote safety. A height of 1/4-inch is specified because it strikes a balance between being legible at a distance while not being excessively large, which could be impractical for many warning signs. This size is typically sufficient to alert users to critical safety information without causing visual clutter.

The choice of 1/4-inch reflects standards that prioritize user safety in environments like saunas, where clear and visible warnings are crucial due to the nature of the equipment involved. This height ensures that individuals can quickly identify safety instructions without difficulty, contributing to a safer environment for all users.