• INTRODUCTION
• Masonry Heaters.
• Heaters Studied.
• AIRTIGHT HOUSING AND MASONRY HEATING ISSUES
• Outside Combustion Air.
• House Depressurization.
• Spillage: Outside Air and Airtight Doors.
• Tailout.
• Underfire air.
• TEST PROCEDURE
• Data Collection.
• DTR Calibration.
• Air Consumption.
• Tailout.
• System Leakage.
• Door Leakage.
• Damper Curves.
• DESCRIPTION OF THE TESTS
• 01TEM.
• 02SEN.
• 03SEN.
• 04SEN.
• 05MSB.
• 06MSB.
• 07AND.
• 08AND.
• Leakage and Tailout Test: 10SEN-re.
• Leakage Test: LK-SEN.
• Leakage Test: LK-AND.
• Door Leakage Tests.
• DTR Calibration.
• A simple check against theoretical values can be done at 10 Pa. Here, the flow equation reduces to A = Q * .0004(), where Q is flow in L/s and A is the orifice area in m2. For example, the .0036 orifice is in good agreement with this equation, with a measured flow of 9.5 L/s versus a theoretical value of 9.0 L/s.
• DISCUSSION
• Air Consumption.
• House Depressurization.
• Outside Combustion Air.
• Tailout.
• Door Leakage.
• System Leakage.
• North American manufactured masonry heaters typically consist of a core that is site-assembled and then faced with a brick veneer. The effect on system leakage of a brick veneer with solid grout between the veneer and the heater core was demonstrated. System leakage would add to the effective ELA of the heater-chimney system and correspondingly higher air consumption and chimney flows. The core system in a masonry heater requires a method to account for thermal expansion, and this is accomplished in a number of ways by different manufacturers. Ideally one should not have to rely exclusively on workmanship in the veneer for tightness. This might be difficult to control, particularly with masons first making the transition to masonry heater construction. One solution would be to develop standard details that would address this issue. Building codes could address this as well. A performance rather than a prescriptive approach would also be an option: at 20 L/s flow rates for example, actual flue gas velocity can be measured inexpensively with a pitot tube inserted into the chimney damper slot.
• CONCLUSIONS
• REFERENCES

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