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 maximum BTU per hour input rating for a listed unvented wall-mounted room heater equipped with an oxygen depletion safety shut off system installed in a bedroom is important for safety and compliance with building codes. This specific rating is 10,000 BTU/hr.

The reason for this limit is primarily related to ensuring adequate oxygen levels in a confined space like a bedroom. Unvented heaters can consume oxygen as they burn fuel, leading to potential hazards—especially in smaller, enclosed areas. The oxygen depletion safety shut off system is designed to mitigate risks by automatically turning off the heater if oxygen levels drop to an unsafe threshold, but the maximum input rating helps ensure that the system does not operate under conditions or in spaces that could pose health risks.

Options presenting higher BTU ratings exceed the safety measures put in place to protect individuals in a sleeping area. Maintaining this limit of 10,000 BTU/hr safeguards both occupants and property by ensuring sufficient ventilation and reducing the risk of harmful carbon monoxide buildup.