Fireback (2' from bottom)
Air temp 10' from fireplace
8am 9am 10am 11am 12 1pm 2pm 3pm
96 315 319 355 370 342 327 415
69 78 82 84 87 85 87 89
Temperatures in F
Fireplace warm from fire night before
Started fire after 8am
Added 2-3 pieces of wood each hour
*moved measuring point on wall
The results of my home test are attached. I returned the laser to the owner, so I'll have to call him to get a name and a manufacturer.
Some of the notable things about the test for me was the effect of the thicker masonry (see side of chimney & side of fireplace readings.) I will say that after reading the temperature at the back of the firebox, I am glad that I had the mason leave the 4" clearance between the masonry and the back wall. U.S. Gypsum states that "the maximum continued temperature at which wallboard can be exposed is 125 F."
On the performance end, the temperature reading of the sheetrock wall which faces the fireplace from 10.5' away validates the radiant effect of the rumford design.
I suppose to test it under a worst case scenario, someone would have to have reproduce an actual chimney fire, and take measurements of that. I'll let someone else do that.*
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Buckley Rumford Fireplaces
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