Thanks for the answer.
Can someone point me to portions of the code that might deal with this? It seems like that it is some given requirement to have fire rated wall between utility room and living quarters, but none has been able to tell me which code or portion thereof that spells this out.
I have a utility closet for water heater and furnace on the back of my house (residential). The side and back walls of the closer are common with living quarters. Normally, a 1 hour fire wall is required. My question is, since I have sprinklers in the house as well as the utility closet(required...