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2019 MHA Research Heater Tests

Test MHA-1908
February 7, 2019

Random loading, red oak, log cabin stacking, top ignition. Cold firebox.
Pieces loaded in order of increasing weight. 2344 stacking.
69.3 lbs including 2.0 lbs kindling
Estimated moisture 15%.
Run #2 of a cold firebox test series. Heater fired every 2nd day.
This is the second test that was fully automated - once the Condar and Testo were set up
and turned on, there was no intervention until the Condar was turned off at 90 minutes.
The Testo data was started before the test and run for 30 minutes past the 90 minute test.

Pisla HTT 602 door, 22" wide
Austrian eco firebox, see  http://www.heatkit.com/research/lopez-2014-03-01.html

This was the sixth full run  using the new automated Condar controller


Condar spreadsheet results at 90 minutes.

Condar Spreadsheet

Testo Raw Data 

Lab Notes 


Flue gas graph to 90 minutes.


Testo gas graph.  Blue line is stack temperature and purple line is oxygen.
The Testo data was started before ignition and run for 30 minutes past the 90 minute test. At the end it was run in free air for approx 10 minutes.


Random loading, red oak, log cabin stacking, top ignition. Cold firebox.
Pieces loaded in order of increasing weight. 2344 stacking.
63.6 lbs including 2.0 lbs kindling



Burn sequence. Time lapse taken at 2 minute intervals.
The white square marks the normal 90 minute mark for end of test.
With the Austrian eco-labelled air system, coals are not normally burned up, and the air is turned off at 90 minutes. For this load in actual use, air would be turned down at 90 minutes, and turned off around 120 minutes.


This page was updated on February 7, 2019
This page was created on February 7, 2019