This is the way they installed the the new heads. Center of sprinkler to wall is exactly 4". I think we're struggling with a power trip right now. It is in a small closet. But from all the references and opinions above, I would continue to think that the bulb is the center of the detector and it is the center of the detector that must be at 4" of the wall. The distance of the deflector is not that important as NFPA talk consider the dead-air space and operation time
This is the way they installed the the new heads. Center of sprinkler to wall is exactly 4". I think we're struggling with a power trip right now. It is in a small closet. But from all the references and opinions above, I would continue to think that the bulb is the center of the detector and it is the center of the detector that must be at 4" of the wall. The distance of the deflector is not that important as NFPA talk consider the dead-air space and operation time
We're the engineers behind the conception. Yes in Canada. Closets are 2'1"D X 5'4"W X +/- 8' H
It’s the gallons of paint thinner and such they are storing in the closet ...Boy one second delay, is going to take out the entire closet.......