What is the maximum BTU per hour input rating for a listed unvented wall-mounted room heater equipped with an oxygen depletion safety shut-off system being installed in a bedroom?

The correct answer reflects the safety regulations regarding the use of unvented room heaters. For unvented wall-mounted room heaters equipped with an oxygen depletion safety shut-off system, the maximum allowable input rating for installation in a bedroom is set at 10,000 BTU per hour. This standard is in place to ensure safe operation in confined spaces, as these heaters consume oxygen from the room air and may pose a risk of oxygen depletion if not properly rated.

The specification for a maximum of 10,000 BTU per hour allows for adequate heating while minimizing the risk of asphyxiation or harmful gas buildup. Furthermore, safety standards provide guidelines regarding combustion appliances in residential spaces, especially bedrooms where occupants are likely to be sleeping, thus requiring stricter limits on emissions and oxygen consumption. The 10,000 BTU/hr limit provides a balance between effective heating and safety measures in compliance with regulatory codes.