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Results from Recent Testing - 2009--2010


Graphical Summary











HK-L20

February 26/10

Second of a pair matched loads, large loads of wet birch, stacked front to back.
White birch, 78.1 lb total, incl. 3.75 lbs kindling. 31.7% moisture.
North-South loading. Largest pieces first. Loaded onto a coal bed (Colorado method)
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.

Did not spike like last test, slower controlled start, yet hotter burn overall, slightly shorter.
Slightly drier, hotter firebox to start, so difference must have been in the stacking.
40% lower PM, 20% lower CO, 0.6% higher efficiency

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L19

February 25/10

First of a pair of matched loads, large loads of wet birch, stacked front to back.
White birch, 79.0 lb total, incl. 3.75 lbs kindling. 34.2% moisture.
North-South loading. Largest pieces first. Loaded onto a coal bed (Colorado method)
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.

Modified bell from HK-L17.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L18

February 21/10

Fuel load similar to HK-L16 and L17. Warm heater.
White birch, 51.6 lb total, incl. 3.75 lbs kindling. 31.7% moisture.
North-South loading. Largest pieces first. Loaded onto a coal bed (Colorado method)
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.

Modified bell from HK-L17.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L17

February 20/10

Second test of a control pair with cordwood. Matched set of fuel loads. Warm heater.
White birch, 53.1 lb total, incl. 3.75 lbs kindling. 28.3% moisture.
North-South loading. Largest pieces first. Loaded onto a coal bed (Colorado method)
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.

For this test, the bell attached to the heater was modified. A diverter brick was added
inside. The average stack temperature dropped 13 degrees, and the efficiency increased
by 1.5%.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L16

February 19/10

First test of a control pair with cordwood. Matched set of fuel loads. Warm heater.
White birch, 54.2 lb total, incl. 3.75 lbs kindling. 28.3% moisture.
North-South loading. Largest pieces first. Loaded onto a coal bed (Colorado method)
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L15

February 4/10

Series 4: Test #2 of a 2 test pair with matched cribs. Warm heater.
Colorado M-4 (MHA Fueling Protocol) cribs. Spruce at 19.4% average moisture.
Loading factor 0.15 . Reload
3.75 lbs kindling + 26.8 lb crib (19.30 % av moisture) + reload w. 27.4 lb crib (19.52% av moisture).
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.
Detailed moisture descriptions of cribs to follow.
Condar spreadsheet contains detailed lab notes.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L14

February 3/100

Series 3: Test #1 of a 2 test pair with matched cribs. Warm heater.
Colorado M-4 (MHA Fueling Protocol) cribs. Spruce at 19.1% average moisture.
Loading factor 0.15 . Reload
3.75 lbs kindling + 27.2 lb crib (19.02 % av moisture) + reload w. 26.8 lb crib (19.11% av moisture).
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.
Detailed moisture descriptions of cribs to follow.
Condar spreadsheet contains detailed lab notes.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L13

February 2/10

Cold heater.
Colorado M-4 (MHA Fueling Protocol) cribs. Spruce at 21.7% average moisture.
Loading factor 0.15 . Reload
3.75 lbs kindling + 27.0 lb crib (21.57 % av moisture) + reload w. 26.7 lb crib (21.85% av moisture).
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.
Lower PM than L12, which was 5% lower moisture (16.7%), also smaller load, and cool heater instead of cold heater.
Warmup run for L14/L15, which is the 3rd repeat test with matched cribs, in a warmed heater.
First test with a new batch of 2x4 lumber, from a different supplier than L05 - L12

condar


 

gas
Flue Gas Data

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Opacity

 

HK-L12

January 26/10

Series 3: Test #2 of a 2 test pair with matched cribs.
Cool heater. Fired 24 hours previously, but ashbox door and chimney damper left open by mistake.
Colorado M-4 (MHA Fueling Protocol) cribs spruce at 16.7% average moisture.
Loading factor 0.13 . Reload
3.75 lbs kindling + 18.8 lb crib (16.72 % av moisture, estimated) + reload w. 16.2 lb crib (16.72% av measured moisture).
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.
This test seems very close to the previous one. The colder start could account for the higher PM.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L11

January 25/10

Series 3: Test #1 of a 2 test pair with matched cribs. Warm heater. See fuel notes.
Colorado M-4 (MHA Fueling Protocol) cribs spruce at 16.1% average moisture.
Loading factor 0.13 . Reload
3.75 lbs kindling + 18.8 lb crib (16.10 % av moisture) + reload w. 16.8 lb crib (16.10% av moisture).
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L10

January 24/10

Series 2: Test #2 of a 2 test pair with matched cribs. Warm heater.
Colorado M-4 (MHA Fueling Protocol) cribs spruce at 16.1% average moisture.
Loading factor 0.15 . Reload
3.75 lbs kindling + 26.6 lb crib (16.56 % av moisture) + reload w. 24.6 lb crib (15.60% av moisture).
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L09

January 23/10

Series 2: Test #1 of a 2 test pair with matched cribs at 16.1% moisture.Warm heater.
Colorado M-4 (MHA Fueling Protocol).
Loading factor 0.15. Reload
3.75 lbs kindling + 25.8 lb crib (16.28% moisture) + reload w. 25.8 lb crib (15.82% moisture).
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L08

January 22/10

Series 1: Test #2 of a 2 test pair with matched cribs. Warm heater.
Colorado M-4 (MHA Fueling Protocol) cribs spruce at 20.2% average moisture.
Loading factor 0.15 . Reload
3.75 lbs kindling + 24.0 lb crib (20.23% moisture) + reload w. 24.0 lb crib (20.25% moisture).
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L07

January 21/10

Series 1: Test #1 of a 2 test pair with matched cribs. Warm heater.
Colorado M-4 (MHA Fueling Protocol) cribs spruce at 19.7% average moisture.
Loading factor 0.15 . Reload
3.75 lbs kindling + 24.0 lb crib (20.9% moisture) + reload w. 25.0 lb crib (18.4% moisture).
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L06

January 20/10

Cold heater.
Colorado Method 4 (MHA Fueling Protocol) cribs of dry spruce.
Loading factor 0.15. Reload
3.75 lbs kindling + 22 lb crib + reload w. 22.6 lb crib.
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L05

January 12/10

Cold heater. Cold fuel. Cordwood. No draft, slow start, dirty burn.
9 pieces dry hardwiid. 4.5 lbs kindling. 59 lbs total.
Efficiency now is calculated at 95% oxygen recovery (Colorado method)

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gas
Flue Gas Data

opacity
Opacity

 

HK-L04

January 11/10

Warm heater. Small crib of very dry spruce. Same crib as L03, except spacers changed for more air, and no cold start.
3.75 lbs kindling. 38.5 lbs total.
Regular kindling insead of a crib.
Efficiency is calculated at 95% oxygen recovery (Colorado method).
Stack temperature corrected for height.

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gas
Flue Gas Data

opacity
Opacity

 

HK-L03

January 10/10

Cold heater. small crib of dry spruce. Spacers not correct - blocking some airflow through pile.
3.75 lbs kindling. 39.8 lbs total.
Efficiency now is calculated at 95% oxygen recovery (Colorado method). This yields a lower number
than normal operation.

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-L02

January 6/10

Warm heater. Large crib of 10% moisture spruce, followed by a load of 25% moisture hardwood
122.5 lbs total
Testo flue gas data was lost due to computer crash - estimated values are used to obtain a rough PM number
Efficiency is calculated at 95% oxygen recovery (Colorado method)

condar


 


Flue Gas Data - not available


Opacity - not available

 

HK-L01

January 5/10

Cold heater. Cold fuel. Cordwood. No draft, slow start, dirty burn.
9 pieces dry hardwiid. 4.5 lbs kindling. 59 lbs total.
Efficiency now is calculated at 95% oxygen recovery (Colorado method)

condar


 

gas
Flue Gas Data

opacity
Opacity

 

HK-K37

February 25/09

Warm heater. Previous fire 24 hrs.
White Birch, 20% moisture
Very large load. Two very large pieces (12.8 lbs ea) at bottom. 3 small pieces on top
10 pieces. 3.3 lbs kindling. 81.9 lbs total. Pieces larger than yesterday: 8.9 lbs vs. 5.9 lbs
Very staged burn. Clean start. No overamping.
Low CO. Low PM. Compared with run HK-K35, CO is lower, PM is higher.
Air control closed at 120 minutes. Data for calculation based on 120 minutes. Flue damper left open 1",
closed 6 hrs later.

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 12 minutes)

opacity
Opacity

 

HK-K36

February 24/09

Warm heater. Previous fire 24 hrs.
White Birch, 20% moisture
Very large load. Two very large pieces (12.8 lbs ea) at bottom. 3 small pieces on top
10 pieces. 3.3 lbs kindling. 81.9 lbs total. Pieces larger than yesterday: 8.9 lbs vs. 5.9 lbs
Very staged burn. Clean start. No overamping.
Low CO. Low PM. Compared with run HK-K35, CO is lower, PM is higher.
Air control closed at 120 minutes. Data for calculation based on 120 minutes. Flue damper left open 1",
closed 6 hrs later.

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 18 minutes)

opacity
Opacity

 

HK-K35

February 23/09

Very warm heater. Previous fire 15 hrs.
White Birch, 20% moisture
Big load. Two very large pieces (12.3 lbs ea) at bottom. 3 small pieces on top
11 pieces. 3.5 lbs kindling. 68.3 lbs total. Pieces larger than yesterday: 5.9 lbs vs. 4.6 lbs
Very staged burn. Clean start. Slight, prolonged overamping at 23 minutes
Moderate CO. Low PM. Compare with run HK-K34
Air control closed at 94 minutes. Data for calculation based on 94 minutes. Flue damper left open 1",
closed 6 hrs later.

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 16 minutes)

opacity
Opacity

 

HK-K34

February 22/09

Hot heater. Previous fire 7 hrs.
White Birch, 20% moisture
Small pieces, big load, stacked front to back.
Ignition from top.
15 pieces. 3.3 lbs kindling. 73.0 lbs total. Pieces larger than yesterday: 4.6 lbs vs. 3.2 lbs
Very staged burn. Clean start. Moderate overamping at 25 minutes
Moderate CO. Low PM.
Compare with run HK-K33

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 8 minutes)

opacity
Opacity

 

HK-K33

February 22/09

Warm heater. Previous fire 13 hrs.
White Birch, 20% moisture
"Austrian style fuel". Very small pieces. 18 pieces. 3.9 lbs kindling. 60.4 lbs total. Pieces larger than yesterday: 3.2 lb vs. 2.1 lbs
Stacked front to back. Ignition from top
Very staged burn. Clean start. Overamping starting at 35 minutes.
Moderate CO. Low PM. Compare with run HK-K32
Data for calculation stopped at 70 minutes, when air control was closed.
Flue damper left open 0.5".

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 8 minutes)

opacity
Opacity

 

HK-K32

February 21/09

Warm heater. Previous fire 8 hrs. Hot firebox.
White Birch, 20% moisture
"Austrian style fuel".
Very small pieces. 17 pieces. 3.5 lbs kindling. 39.7 lbs total, stacked teepee style.
Very fast, clean start. CO peak at 12 minutes.
Fast burn - 50 minutes
Moderate CO. Low PM. Compare with run HK-K31
Data for calculation stopped at 50 minutes, when air control was closed.
Flue damper left open 0.5".

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 3 minutes)

opacity
Opacity

 

HK-K31

February 21/09

Warm heater. Previous fire 24 hrs.
Firebox door left open overnight - firebox not very hot.
White Birch, 20% moisture
"Austrian style fuel".
Very small pieces. 10 pieces. 4 lbs kindling. 35.5 lbs total, stacked teepee style.
False start, more kindling added at 6 minutes
Slow burn, low opacity, high oxygen, steady CO
Moderate CO. Moderate PM. Low stack temp, high oxygen, lower efficiency.
Data for calculation stopped at 80 minutes, when air control was closed.
Flue damper left open 1" and shut 4 hrs later.

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 3 minutes)

opacity
Opacity

 

HK-K30

February 20/09

Warm heater. Previous fire 24 hrs.
White Birch, 20% moisture
4 large pieces, 3 medium pieces, 3 small pieces. 4.5 lbs kindling, 76.2 lbs total
Pieces loaded in hot heater, 8 hrs after fire, and baked in firebox for 14 hours.
Standard log cabin stacking. Side kindling, newspaper near top. Kindling not baked.
3 small pieces on top, next to the kindling.
Good bright ignition. Huge CO spike at 14 minutes. Fire overamped (see animation). CO never really cleaned up
High CO. Moderate PM.
Data for calculation stopped at 90 minutes, when air control was closed.
Cold air bypass open. Doors not taped. Flue damper left open 1" and shut 4 hrs later.

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 5 minutes)

opacity
Opacity

 

HK-K29

February 19/09

Warm heater. Previous fire 24 hrs.
White Birch, 20% moisture
5 large pieces, 3 small pieces. 4.5 lbs kindling, 67.2 lbs total
Standard log cabin stacking. Side kindling, staged.
3 small pieces on top, next to the kindling.
Good clean ignition. Moderate CO spike at 25 minutes
Moderate CO. Low PM.
Data for calculation stopped at 90 minutes, when air control was closed.
Cold air bypass open. Doors not taped. Flue damper left open 1" and shut 4 hrs later.

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 10 minutes)

opacity
Opacity

 

HK-K28

February 18/09

Warm heater. Previous fire 24 hrs.
White Birch, 20% moisture
6 large pieces. 1 small piece. 4.5 lbs kindling, 63.4 lbs total
Standard log cabin stacking. Side kindling, staged.
Wood was cold. The single small piece was put at the front of the second row.
Slow ignition due to cold wood, then overamping due to the small piece, then underamping (rebound from the overamping). See gas curves.
High CO. Relatively high PM.
Data for calculation stopped at 90 minutes, when air control was closed.
Cold air bypass open. Doors not taped. Flue damper left open 1" and shut 4 hrs later.

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 10 minutes)

opacity
Opacity

 

HK-K27

February 17/09

Warm heater. Previous fire 24 hrs.
White Birch, 20% moisture
Small pieces. 9 pieces, 4.5 lbs kindling, 60.6 lbs total
Standard log cabin stacking. Top kindling. See stacking photo.
Well staged ignition, avoiding CO spike at start.
Data for calculation stopped at 90 minutes, when air control was closed.
Cold air bypass open. Doors not taped. Flue damper left open 1" and shut 4 hrs later.

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 13 minutes)

opacity
Opacity

 

HK-K26

February 16/09

Warm heater. Previous fire 24 hrs.
White Birch, 20% moisture
Large pieces. 8 pieces, 4.5 lbs kindling, 69.4 lbs total
Standard log cabin stacking. Side kindling, staged from top.
Data for calculation stopped at 100 minutes, when air control was closed.
Cold air bypass open. Doors not taped. Flue damper left open 1" and shut 6 hrs later.

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 13 minutes)

opacity
Opacity

 

HK-K25

February 15/09

Warm heater. Previous fire 24 hrs.
White Birch, 20% moisture
Large pieces. 7 pieces, 4.5 lbs kindling, 64.1 lbs total
Pieces stacked front to back. Kindling as shown
Bad stacking, bad kindling location. Pile didn't catch, newspaper was added at 23 minutes
Pile poked twice. Slow burn, elevated oxygen, continuous low level CO..
Data for calculation stopped at 120 minutes, when air control was closed.
Cold air bypass open. Doors not taped. Flue damper shut 2 hrs after air was shut.

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 18 minutes)

opacity
Opacity

 

HK-K24

February 14/09

Slightly warm heater. Large load 48 hrs previous, damper closed
White Birch, 20% moisture
Very large pieces. 8 pieces, 4.5 lbs kindling, 73.5 lbs total
Pieces stacked front to back. Kindling on right side, lit from top
Very fast and clean start. 2pc left-to-right on rear grate, to provide delayed ignition from
the grate location. This was a mistake - load overamped, very high CO starting at about 10 minutes
Low PM, high CO. Efficiency loss from CO alone was 4.6%
Data for calculation stopped at 90 minutes, when air control was closed.
Cold air bypass open. Doors not taped. Flue damper shut 2 hrs after air was shut.

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 19 minutes)

opacity
Opacity

 

HK-K23

February 12/09

Very warm heater - large load yesterday, with damper closed, weather warmer than during most of the testing.
White Birch, 20% moisture
Very small pieces. 16 pieces, 4.5 lbs kindling, 61.4 lbs total
Pieces stacked front to back. Kindling on top.
Sluggish start. Chimney was cold, 59F. Slight spillage on start. Water condensed on the glass, big CO spike.
Data for calculation stopped at 90 minutes, when air control was closed.
Cold air bypass open. Doors not taped. Flue damper shut 2 hrs after air was shut.

Condar Summary
condar

 

gas
Flue Gas Data (Note: time on gas graph is offset by 8 minutes)

opacity
Opacity

 

HK-K22

February 11/09

Slightly warm heater - damper had been left open, ashbox air control closed. Cold air bypass was open.
White Birch, 20% moisture
Small, 11 pieces, 4.5 lbs kindling, 62.6 lbs total
Pieces stacked front to back. Kindling stacked between two pieces on right(see stacking pattern)
Zero CO spike at the beginning. Extremely clean start. Overamped at 19 minutes.
Low oxygen value (good efficiency)
Data for calculation stopped at 81 minutes, when air control was closed.
Flue damper left open. Cold air bypass open.
Same as yesterday, except door and ashbox door taped shut (reduced leakage).

Condar Summary
condar

 

gas
Flue Gas Data

opacity
Opacity

 

HK-K21

February 10/09

Slightly warm heater - damper had been left open, ashbox air control closed. Cold air bypass was open.
White Birch, 20% moisture
Small, 11 pieces, 4.5 lbs kindling, 62.6 lbs total
Pieces stacked front to back. Kindling stacked between two pieces on right(see stacking pattern)
Zero CO spike at the beginning. Extremely clean start. Overamped at 19 minutes.
Low oxygen value (good efficiency)
Data for calculation stopped at 81 minutes, when air control was closed.
Flue damper left open. Cold air bypass open.
Same as yesterday, except door and ashbox door taped shut (reduced leakage).

Condar Summary
condar

 

gas
Flue Gas Data

opacity
Opacity (Note: time on gas graph is offset by 8 minutes),

 

HK-K20

February 9/09

Slightly warm heater - damper had been left open, ashbox air control closed.
No seal on doors.
White Birch, 20% moisture
Large, 7 pieces, 4.5 lbs kindling, 62.8 lbs total
Pieces stacked front to back.
Kindling stacked between two pieces on right (see stacking pattern)
Zero CO spike at the beginning. Very low CO overall.
Very low PM. Very steady oxygen value.
Data for calculation stopped at 90 minutes, when air control was closed.
Flue damper left open. Cold air bypass open.

Condar Summary
condar

 

gas
Flue Gas Data

opacity
Opacity

 

HK-K19

February 8/09

Slightly warm heater - damper had been left open, ashbox air control closed. No seal on doors.
White Birch, 20% moisture
Small wood, 11 pieces, 4.5 lbs kindling, 64.2 lbs total
Pieces stacked front to back. Kindling on top, favoring right side (see stackin pattern)
No CO spike at the beginning. Very steady oxygen value.
Data for calculation stopped at 71 minutes, when air control was closed.
Flue damper left open. Cold air bypass closed.

Condar Summary
condar

 

gas
Flue Gas Data

opacity
Opacity

 

HK-K18

February 7/09

Slightly warm heater - damper had been left open, ashbox air control 1/2 open.
White Birch, 20% moisture
9pieces, 4.5 lbs kindling, 61.6 lbs total
Pieces tacked front to back. Kindling on top, favoring right side (see stackin pattern)
No CO spike at the beginning. Very steady oxygen value.
Data for calculation stopped at 71 minutes, when air control was closed.
Flue damper left open. Cold air bypass open. See surface temp curves

Condar Summary
condar

 

gas
Flue Gas Data

opacity
Opacity

 

HK-K17

February 6/09

Cool heater - damper and ashbox door had been left open from yesterday's burn
White Birch, 20% moisture
12 pieces, 4.5 lbs kindling, 64.4 lbs total
Smaller pieces, stacked front to back. Kindling on top.
No CO spike at the beginning, a very significant result.
Data problems with Testo analyzer, see notes below gas graph.

Ashbox door closed, air inlet left open 50% to simulate a slightly leaky heater. Damper left open.
Cold air bypass closed.

Very good numbers, but not reliable due to data loss. See notes with gas graph.

Condar Summary
condar

 

gas
Flue Gas Data
Equipment problems. First 18 minutes missing, data loss due to power failure. Values estimated from memory.
Testo malfunction between 42 minutes and 80 minutes - data interpolated between adjacent values.
Ashbox door was closed at 101 minutes, and air control closed 50%. Only gas data up to 101 minutes was used to
calculate efficiency and emissions.

 

HK-K16

February 5/09

Warm heater
White Birch, 20% moisture
9 pieces, 4.5 lbs kindling, 63.6 lbs total
Smaller pieces, kindling stacked tighter than HK-K15, to slow down start
Slower start. CO and PM spikes, delayed and smaller than HK-K15.

Air left open, flue damper left open. Data collection stopped at 120 minutes.
Very low efficiency at the end, which reduced overall average to 70.0%, slightly lower than others
This is a reference run to get surface temperature data for a cycle with damper open plus ashbox door open (worst case).

Condar Summary
condar

 

gas
Flue Gas Data

opacity
Opacity

 

HK-K15

February 4/09

Warm heater
White Birch, 20% moisture
8 pieces, 4.5 lbs kindling, 60.6 lbs total
Smaller pieces, very fast start in kindling stack.
CO spike at beginning, PM spike.

Air closed at 72 minutes with glowing coal bed.
Flue damper left open.

Condar Summary
condar

 

gas
Flue Gas Data

opacity
Opacity

 

HK-K14

February 3/09

Warm heater
White Birch, 20% moisture
6 pieces, 4.5 lbs kindling, 62.3 lbs total
Two large logs on bottom.

Air closed at 100 minutes with glowing coal bed.
Flue damper left open.

Condar Summary
condar

 

gas
Flue Gas Data

opacity
Opacity

 

HK-K13

February 2/09

Cold heater
White Birch, 20% moisture
6 pieces, 4.5 lbs kindling, 63.0 lbs total

Condar Summary
condar

 

gas
Flue Gas Data

opacity
Opacity

 

HK-K12

January 19/09

Warm heater
Air closed at 115 minutes. Damper cut back. Closed at 275 minutes.
Somewhat tight stacking, resulting in a bit of PM.
Large kindling, slower start.

White Birch, 20% moisture
7 pieces, 4.5 lbs kindling, 63.0 lbs total

Condar Summary
condar

 

gas
Flue Gas Data

opacity
Opacity

 

HK-K11

January 18/09

Warm heater.
Air closed at 112 minutes. Damper left open.
Very staged burn, with evenly shaped half logs.
No overamping, very low CO

White birch, 20% moisture
7 pieces, 4.8 lb kindling, 63.5 lbs total

Condar Summary
condar

 

gas
Flue Gas Data

opacity
Opacity

 

HK-K10

January 17/09

Warm heater. Surface temperatures are being tracked for damper comparisons, and data will be added later
Damper closed at end of run.

White birch, 20% moisture
7 pieces, 4.3 lb kindling, 60.3 lbs total

Oxygen calibration error. Oxygen values were adjusted in the Condar spreasheet. See Testo spreadsheet for
details.

Condar Summary
condar

 

gas
Flue Gas Data

opacity
Opacity

 

HK-K09

January 16/09

Warm heater. Surface temperatures are being tracked for damper comparisons, and data will be added later
Damper left open at end of run

White birch, 20% moisture
8 pieces, 4.3 lb kindling, 63.1 lbs total

Very nice clean, staged start. Fast start.
Slightly smaller wood (8 pieces)

Condar Summary
condar

 

gas
Flue Gas Data

opacity
Opacity

 

HK-K08

January 15/09

Warm heater. Surface temperatures are being tracked for damper comparisons, and data will be added later
Damper closed at end of run. (Jan 17/09: damper was found not to be closing all the way. See heatkit.com/research/2009/lopezk-labjack.htm)

White birch, 20% moisture
7 pieces, 4.3 lb kindling, 62.1 lbs total

Very nice clean, staged start.
Pieces stacked a little looser than HK-K07 (yesterday)

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HK-K07

January 14/09

Warm heater. Surface temperatures are being tracked for damper comparisons, and data will be added later
Damper left open at end of run.

White birch, 20% moisture
6 pieces, 4.5 lb kindling, 60.5 lbs total

pieces stacked close together. 2 bottom pieces did not allow air circulation,
slowed down the burn, resulting in slightly higher oxygen and lower efficiency

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HK-K06

January 13/09

Warm heater. Surface temperatures are being tracked for damper comparisons, and data will be added later
Damper closed at end of run. (Jan 17/09: damper was found not to be closing all the way. See heatkit.com/research/2009/lopezk-labjack.htm)

White birch, 20% moisture
6 pieces, 4.5 lb kindling, 63.2 lbs total

False start, had to light kindling newspaper at middle of pile.
First test with grate air open.
Noticeably better burn. Low CO, low PM

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HK-K05

January 12/09

Warm heater. Surface temperatures are being tracked for damper comparisons, and data will be added later
Damper left open, with cold air bypass open.

White birch, 20% moisture
6 pieces, 4.5 lb kindling, 63.4 lbs total

Large CO and PM spike about 15 minutes in.
5% efficiency loss due solely to CO, about 3% higher than normal.
Grate air inadvertently closed for entire run.

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HK-K04

January 11/09

Warm heater. Surface temperatures are being tracked for damper comparisons, and data will be added later.
Damper closed at end of run. (Jan 17/09: damper was found not to be closing all the way. See heatkit.com/research/2009/lopezk-labjack.htm)

White birch, 20% moisture
6 pieces, 4.5 lb kindling, 63.7 lbs total

Equipment malfunction from minute 0 to 35. Gas values during that interval estimated from previous test.

Kindling mis-start, see details below. Higher PM than previous tests, at 1.5 g/kg.
Grate air inadvertently closed for entire run.

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HK-K03

January 10/09

Warm heater. Surface temperatures are being tracked for damper comparisons, and data will be added later

White birch, 20% moisture
6 pieces, 4.5 lb kindling, 62.3 lbs total

Grate air inadvertently closed for entire run

 

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HK-K02

January 9/09

Warm heater. Surface temperatures are being tracked for damper comparisons, and data will be added later

White birch, 20% moisture
7 pieces, 4.5 lb kindling, 63.7 lbs total

Slightly lower PM due to warm heater. Very consistent CO and efficiency with yesterday
Grate air inadvertently closed for entire run

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HK-K01

January 8/09

This is the first run in the HK-K series. Cold heater, warmup run.

Aim is to run a set of consistent repeat runs, to energize the heater identically, for a series of chimney damper tests

White birch, 20% moisture
6 pieces, 4.5 lb kindling, 65.1 lbs total

Difficulty lighting the kindling from the top, with a cold heater.
Fuel pieces were a bit large, 10.1 lbs average

Grate air inadvertently closed for entire run

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This page was updated on March 2, 2010
This page was created on February 3, 2009