King Of Prussia, PA: Finnish Contraflow Masonry Heater

Our clients in King Of Prussia, Pennsylvania have worked for years to retrofit their older home into a modern, zero net energy design. The ambitious plan began with a small addition, improved insulation, and active solar photo-voltaic panels. With these stages complete, it was time to install the clean burning masonry heater into the center of the home.

The homeowner opened the family room floor and built the masonry base to support the masonry heater in the crawl-space below. Once the concrete hearth pad is complete, the masonry heater core and block shell begin simultaneously. The photo below shows the finished high temperature core surrounded by the block heater facing.

The block masonry chimney sits to the left of the Finish fireplace. The masonry chimney transitions to a double wall metal pipe to exit the house.

The block shell is completed after the core. A brick arch spans the bake-oven opening. The travertine bake-oven shelf and mantle are also installed in the block shell. The photo below shows the completed shell and heated bench.

After the heater facing is complete, the two coats of stucco are applied to the heater. Once the stucco sets overnight, the heater door hardware is installed including the loading door, the bake-oven door, ash-box door, and soot clean out doors.

The masonry heater design also includes a large wood storage box to the right of the loading doors.

Fire Works Masonry