Welcome to
Lopez Labs

The MHA Heater Testing Facilities

Recent Research

Lopez Labs Archive

Jerry Frisch with a prototype of his clean burning Frisch Rosin masonry fireplace system (1995). Norbert Senf holding the "2 min." sign.

Lopez Labs was established in 1992 by the Masonry Heater Association. It purpose is to obtain reliable North American performance data on masonry heaters and masonry fireplaces.

A variety of masonry heaters has been tested. At over one hundred and fifty test runs, this is the largest masonry heater performance database in North America. Lopez also participated with two other labs in a simultaneous field test series of masonry fireplaces at McNear Brick in California in 1995.

Lopez Labs facilities are located in Marysville, WA, and Shawville, Quebec.

A number of papers have been published describing the research at Lopez Labs. These are available at Lopez Labs Archive

Current Research

Fuel crib testing, February 2005

Recent Research

Clearances to Combustibles testing, April, 2001

View color animations and data from the 1997 test series

1997 Tests