I am renovating a bathroom which has a smaller room with a condensing boiler. Does anyone know about the requirements for the access door? Do i need to have a fire rated door?


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  1. the DOB has it own set of rules but it is safe to do with a 2 hr fire rated wall and 90 minutes door opening out. yes you do need a fresh air intake

  2. Why does it need a vent if it relies on outside air for combustion?

  3. The room should be fully enclosed in the proper fire rated enclosure and it should have a fresh air intake for the boiler.