HearthCAT Fireplace Technology has been successfully tested in masonry fireplaces including new construction and retro-fits. HearthCAT has also been successfully tested in Isokern Modular Masonry fireplaces and FMI factory built fireplaces. All test results are consistently below the EPA Phase II Qualification threshold of 5.1 g/kg. The HearthCAT is also approved by many of the air districts in California for retro-fitting existing wood burning fireplaces.

HearthCAT Emission Control Technology is a patented catalytic system designed especially for wood burning fireplaces. The HearthCAT is positioned directly above the fireplace grate against the back wall of the firebox. The HearthCAT Hood captures the smoke and particulates while most of the dilution air bypases the hood and travels up the primary flue system. The HearthCAT™ System provides secondary ignition for the combustibles before they leave the firebox as harmful particulate pollution. The direct flame on the catalytic surface actually cleans the combustors. The HearthCAT System creates a clean wood burning fireplace. This is the only passive technology available for emission control of wood smoke emissions from fireplaces.

Winner of the 2009 Hearth & Home Vesta Award and the 2009 Enivormental Protection Agency Clean Air Excellence Award.

HearthCAT technology  is available nationwide through Whitacre Greer firebrick dealers.


HearthCAT Award Winning Fireplace Technology Literature
Clear Skies Unlimited HearthCAT Press Release
HearthCAT for Masonry Contractors
Masonry Magazine December 2010 HearthCAT Article
Green Fireplace Builders Coalition
Letter from United States Environmental Protection Agency
MFR-100 Clean Burning Site-Built Masonry Fireplace Owner’s Manual