Data Analysis - 185 Masonry Heater Tests from 2006 - 2019

Download the PDF: Data Summary190225-2.pdf

Excerpts:

Here's another run at a summary based on the 185 masonry heater runs at the MHA lab that we are compiling for NESCAUM. These are all the cordwood runs, no cribs. There were 2 masonry heaters, a Heatkit and the MHA Research Heater. The MHA heater used the Austrian eco-labelled firebox air system. The Heatkit had various air systems over the years, but the last 13 runs (2014 series) were done with the eco air system.

Some initial observations:

• more eco-box runs in the clean group
• the clean group had 10% cold firebox starts. The dirty group had 45% cold firebox starts. (48 hours minimum between firings).
• out of 11 runs total with wood moisture higher than 30%, 4 runs are in the dirty group, none in the clean group
• 15 of the clean runs are side ignition, and only 2 are top ignition.
• 8 of the dirty runs are top ignition, 10 are side ignition
• if we exclude cold start runs and wet wood, there are 8 eco box runs in the clean group and 3 in the dirty group.

Norbert