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Masonry Fireplace
Clearances to Combustibles Test

UL-907 Protocol
OMNITEST Services, May, 2000

Lopez Labs Clearance to Combustibles Testing, MHA Annual Meeting, 2001
Lopez Labs Clearance to Combustibles Testing, MHA Annual Meeting, 2000
Lopez Labs Clearance to Combustibles Testing, Shawville, January 2000
See also: Masonry Fireplace Clearance to Combustibles Testing at OMNITEST, March 2000
Draft Report - Fireplace Clearance to Combustible Testing at OMNITEST
by Jim Buckley
Building Code Clearances to Combustibles Debate

Summary of Results
Measurement Locations
Data Sets
Thermal Simulation Software


Efforts are under way to update the clearances to combustibles requirements for the ASTM Guide to Solid Fueled Masonry Heaters.


Summary of Results:

Jerry Frisch supplied the results below of the recent clearances to combustibles tests at OMNITEST Services.


ASTM E1602 specifies a maximum surface temperature of 230F for masonry heaters.

The highest surface temperature reached on the fireplace back was 239F for a masonry fireplace using the UL-907 fueling protocol.


see Jim Buckley's Report

Measurement Locations:

5 calibrated thermocouples were located at the rear of the fireplace back
at 12" height increments, as shown below:


Surface temperature data were taken with a Raytek infrared thermometer by Jerry Frisch.
Simultaneous data were taken by by OMNI with calibrated thermocouples, using an
automated data aquisition system.

The IR thermometer data is shown in the graph below

Data Sets

Download the data in Excel 97 format. Check back regularly for updates






This page last updated on June 1, 2008

This page created on March 26, 2000