Kozy Heat Chaska 34 Gas Insert Type_Grilling Tools The cartridge screws directly onto

The cartridge screws directly onto the suction fitting in the floor of the filter well

Crafted with comfort in mind

The Chaska 25 is actually the second-most-efficient insert in the Kozy Heat lineup behind only the premium Chaska 335S

Available options typically include: Black Brick Refractory — clean

The Caldera 74148 filter cartridge is a factory-original replacement for select Caldera Aventine® spas

Kozy Heat Chaska 34 Gas Insert Type_Grilling Tools The cartridge screws directly ontoThe Kozy Heat Chaska 34 is a slim profile direct vent gas fireplace insert engineered specifically for older masonry fireplaces where deeper inserts simply won't fit. With a modulating 18,500 to 34,000 BTU hr burner, 77% efficiency, just 16 inches of depth, and three media options (log, rock, or glass), the Chaska 34 turns an old wood burning fireplace into a clean, efficient, customizable gas unit in installations that other inserts can't physically