Mason Lite See-Through Firebox Kit, 43", for 16" Class A UL103 Chimney | MFPST43 Ledge Lounger If your heater is no

If your heater is no longer heating efficiently or you’re seeing internal leaks

Pentair supports long term maintenance with readily available parts

The direct vent design vents combustion byproducts outside while drawing fresh air from outside

Useful for walkway

Mason Lite See-Through Firebox Kit, 43", for 16" Class A UL103 Chimney | MFPST43 Ledge Lounger If your heater is noMason Lite MFPST43 43 Inch See Through Firebox Kit For 16 Inch Class A UL103 Chimney The Mason Lite MFPST43 is a 43 inch see through firebox kit designed for two sided fireplace layouts. It uses a 16 inch Class A UL103 chimney and includes one bucket of mortar. This see through firebox is built for projects where the fireplace will be visible from both sides while maintaining a masonry style appearance. 43 inch see through firebox kit Designed for two