TEST REPORT

TEST OF A CATALYTIC WOOD BURNING STOVE FOR EMISSIONS AND EFFICIENCY 

PER EPA METHODS 28 AND 5G-3, FEBRUARY 1988 

Client: Woodstock soapstone 

Attention: Rafael Sanchez

TESTED BY: 

Services Polytests 

411 St-Jacques 

Napierville, QC, J0J 1L0 

TEST DATES : Oct. 16 to nov. 1st , 2013 

REPORT DATE : January 23rd 2014 

Project number : P-1212 

All service are subject to the following general policy: Reports are submitted for exclusive use of the clients to whom they are addressed. Their 

significance is subject to the adequacy and representative character of the samples and to the comprehensiveness of the tests, examinations or 

surveys made. This document may not be reproduced except in its entirety without the written permission from Services Polytests. 

Tested/ written by : 

Danick Power, Jr Eng 

 

Verified by : 

Gaétan Piédalue, P.Eng 
Napierville, Jan. 23rd, 2014 

Client : Woodstock Soapstone 

Project :P-1212 

Page 2 of 29 

SUMMARY

1 Introduction ........................................................................................................................................... 4

1.1 General .......................................................................................................................................... 4

1.2 Test unit information .................................................................................................................... 4

1.3 Results ........................................................................................................................................... 4

1.4 Pretest information ....................................................................................................................... 4

2 Summary of test results ......................................................................................................................... 5

2.1 Emissions ....................................................................................................................................... 5

2.2 Weighted average calculation....................................................................................................... 6

2.3 Test facility conditions .................................................................................................................. 7

2.4 Fuel qualities ................................................................................................................................. 7

2.5 Dilution tunnel flow rate measurements and sampling data (5G-3) ............................................ 8

2.6 Dilution tunnel dual train precision .............................................................................................. 8

2.7 General summary of results .......................................................................................................... 9

3 Process description .............................................................................................................................. 10

3.1 Discussion ................................................................................................................................... 10

3.2 Unit dimensions .......................................................................................................................... 10

3.3 Air supply system ........................................................................................................................ 11

3.4 operation during test .................................................................................................................. 12

3.5 Star-up operation ........................................................................................................................ 13

3.6 Sampling locations ...................................................................................................................... 13

3.7 Drawings ..................................................................................................................................... 13

3.8 Emissions efficiency testing equipment list ................................................................................ 13

4 Sampling methods ............................................................................................................................... 13

4.1 Particulate sampling ................................................................................................................... 14

5 Quality assurance ................................................................................................................................ 14

5.1 Instrument calibration ................................................................................................................ 14

5.1.1 Gas meters .............................................................................................................................. 14

5.1.2 SCALES .................................................................................................................................... 14

5.1.3 Gas analyzers .......................................................................................................................... 14

5.2 Test method procedures ............................................................................................................. 14

5.2.1 Leak check procedures ........................................................................................................... 14

5.2.2 Tunnel velocity flow measurement ........................................................................................ 14

5.2.3 Pm sampling proportionality C5g-3) ....................................................................................... 14
Napierville, Jan. 23rd, 2014 

Client : Woodstock Soapstone 

Project :P-1212 

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List of appendix 

APPENDIX 1: Raw data, forms and results 

APPENDIX 2: Proportionality results 

APPENDIX 3: Calibration data 

APPENDIX 4: Unit pre burn 

APPENDIX 5: Participants 

APPENDIX 6: Drawings and specifications 

APPENDIX 7: Operator’s manual 

APPENDIX 8: Photographs of test set up 

APPENDIX 9: Test load photographs 

APPENDIX 10: Laboratory Operating Procedures 

APPENDIX 11: Sample calculations 

APPENDIX 12: Volume calculations 

APPENDIX 13: Operating instruction 

APPENDIX 14: Drawing Air flow pattern 

APPENDIX 15: Application for wood stove program 

 
Napierville, Jan. 23rd, 2014 

Client : Woodstock Soapstone 

Project :P-1212 

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1 INTRODUCTION

1.1 GENERAL

Laboratory 

• Location: Services Inc., 411 St-Jacques st, Napierville QC, Canada JOJ 1LO 

• Elevation: 100 feet above see level 

Test program 

• Purpose: unit qualification E.P.A. Phase II 

• Test dates: October 16th to November 1st, 2013 

• Test methods used: 

o Particulate emissions: methods 28 and 5G-3 as referred into 40 CFR Part 60 Subpart 

AAA 

o Efficiency: CSA B415.1-10 

1.2 TEST UNIT INFORMATION

General 

• Manufacturer: Woodstock Soapstone 

• Product type: catalytic hybrid wood stove 

• Combustion system: primary air with secondary air baffle and Catalyst (hybrid system) 

• Unit tested: 210 

Particularities 

• Options: Esthetic, optional side panel 

• Product line similarities: N/a 

1.3 RESULTS

Emission results obtained 

• Weighted average emission rate: 1.03g/hr 

• Maximum rate cap: 2.38gr/hr run 6 max burn rate 4.06kg/hr 

Conformity: E.P.A. Phase II 

1.4 PRETEST INFORMATION

Unit condition: The unit was received by carrier 2013 October 7th . The 50hrs of aging is made in week of 

October 7th, 2013. 
Napierville, Jan. 23rd, 2014 

Client : Woodstock Soapstone 

Project :P-1212 

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Set up 

• Venting system type: steel pipe and insulated chimney 

• System height from floor: 15 feet 

• Particularities: The unit was tested with the Top flue configuration 

Break in period 

• Duration: the unit received from the manufacturer and run for at least 50 hours at a category 2 

burn rate with adequate documentation of fuel additions and flue and unit temperatures during 

the week of October 7th, 2013. 

• Fuel: cordwood 

2 SUMMARY OF TEST RESULTS

2.1 EMISSIONS

Run Number Test Date Burn Rate Adjusted Heating 

 (kg/hr) Emission Efficiency 

 Rate (g/hr) (% Overall) 

1 16-10-2013 0,939 0,83 84,5% 

3 21-10-2013 2,148 0,81 78,6% 

4 22-10-2013 1,703 1,05 80,1% 

5 23-10-2013 0,796 0,73 82,9% 

6 24-10-2013 4,064 2,38 74,7% 

7 30-10-2013 1,851 1,36 80,0% 

8 01-01-2013 1,264 1,17 81,2%

 
Napierville, Jan. 23rd, 2014 

Client : Woodstock Soapstone 

Project :P-1212 

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2.2 WEIGHTED AVERAGE CALCULATION

 (E) 

 Ave. Heat (K) 

 Burn Emission Output Weighting 

Test 

No. Rate Rate g/hr (OHE) (BTU/HR) Prob. Factor 

5 0,80 0,732 82,9% 12340 0,2171 0,3219 

1 0,94 0,826 84,5% 14890 0,3219 0,3679 

8 1,26 1,173 81,2% 19287 0,5850 0,5190 

4 1,70 1,050 80,1% 25636 0,8410 0,2972 

7 1,85 1,355 80,0% 27820 0,8823 0,0907 

3 2,15 0,811 78,6% 29540 0,9317 0,1127 

6 4,06 2,376 74,7% 57028 0,9950 0,0683 

sum 1.03 g/hr 

Weighted Average Emissions Rate: 1.03gr/hr 

Weighted Average Overall Efficiency: 82% 

 
Napierville, Jan. 23rd, 2014 

Client : Woodstock Soapstone 

Project :P-1212 

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2.3 TEST FACILITY CONDITIONS

Run Room Barometric Relative 

Air 

Velocity 

Number Temperature pressure humidity 

 Before After Before After Before After Before After 

 (F) (F) (in.Hg) (in.Hg) (%) (%) (ft/min) (ft/min) 

1 77 67 29,973 29,796 47,2 84,6 9 38,3 

3 73 83 30,062 29,914 40,4 38,4 8 11 

4 74 83 29,707 29,678 41,7 31,6 14 11 

5 74 80 29,737 29,766 30,2 60,2 8 13 

6 73 83 29,707 29,707 28,9 24,5 13 19 

7 81 86 30,268 30,180 25,8 21,4 32 11 

8 76 84 29,205 29,235 49 30 12 15 

2.4 FUEL QUALITIES

Run Pre-test Load Test Load 

Number Loading Moisture Coal Weight Density Moisture Piece Number Number 

 Weight Content bed Wet Wet Content Length of of 

 Wet Dry Weight Basis Basis Dry (in.) 2X4's 4x4's 

 Basis Basis (lbs) (lbs) (lbs/cuft) Basis 

 (lbs) (%) (%) 

1 15,00 20,57 4,8 23,00 7,188 21,18 20,5 0 4 

3 16,30 22,89 4,5 21,95 6,859 21,44 20,25 0 4 

4 16,25 21,97 4,6 22,05 6,891 22,36 20,25 0 4 

5 15,50 21,54 4,7 21,95 6,859 22,45 20,25 0 3 
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Client : Woodstock Soapstone 

Project :P-1212 

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6 18,35 23,89 4,8 22,75 7,109 22,88 20,25 0 4 

7 18,15 21,97 4,8 22,35 6,984 22,62 20,25 0 4 

8 15,00 20,77 4,9 22,85 7,141 23,66 20,25 0 4 

2.5 DILUTION TUNNEL FLOW RATE MEASUREMENTS AND SAMPLING DATA (5G-3) 

Average dilution tunnel measurements Sam pie Data 

Run 

Burn 

 Volumetrie Total Volume sampled Particulate catch 

Number Rate Flow Rate Temperatures (DSCF) (mg) 

 (Min) (dscf/min) (°R) 1 2 1 2 

1 550 141,11 556,00 117,915 114,428 5,70 4,90 

3 229 137,59 573,63 51,043 49,492 2,40 2,20 

4 288 138,72 562,86 61,426 59,664 3,80 3,70 

5 613 139,72 552,63 132,608 128,666 5,30 5,10 

6 124 129,06 615,84 23,931 23,196 4,50 3,90 

7 268 141,85 564,18 58,574 56,791 4,70 4,80 

8 398 133,93 557,38 86,269 84,213 6,50 6,00 

2.6 DILUTION TUNNEL DUAL TRAIN PRECISION

Run Sam pie Ratio Total Emission (g) 

Number Train 1 Train 2 Train 1 Train 2 % Deviation 

1 658,19 678,25 3,75 3,32 6,05% 

3 617,29 636,65 1,48 1,40 2,81% 

4 650,39 669,61 2,47 2,48 0,12% 

5 645,88 665,67 3,42 3,39 0,41% 
Napierville, Jan. 23rd, 2014 

Client : Woodstock Soapstone 

Project :P-1212 

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6 668,70 689,92 3,01 2,69 5,59% 

7 649,00 669,38 3,05 3,21 2,60% 

8 617,87 632,96 4,02 3,80 2,80% 

2.7 GENERAL SUMMARY OF RESULTS

Run Burn Average Change in Initial static pressure Primary Run 

Number Rate Surface surface Draft tunnel Air Time 

 (kg/hr) Temperature Temperature (in. H2O) (in. H2O) Setting (min) 

 (F) (F) 

1 0,939 316,47 -32,6 0,052 0,032 

 Pull handle 

1/4" 550 

3 2,148 389,73 80,4 0,065 0,036 

 Pull handle 

1.5" 229 

4 1,703 367,00 75,5 0,065 0,036 

 Pull handle 

3/4" 288 

5 0,796 314,93 -96,0 0,065 0,029 fully close 613 

6 4,064 480,93 110,8 0,078 0,034 Fully open 124 

7 1,851 394,76 29,3 0,067 0,032 

 Pull handle 

3/4" 268 

8 1,264 334,42 64,7 0,042 0,036 

 Pull handle 

1/2" 398 

 
Napierville, Jan. 23rd, 2014 

Client : Woodstock Soapstone 

Project :P-1212 

Page 10 of 29 

3 PROCESS DESCRIPTION

3.1 DISCUSSION

At the beginning of the test program, the manufacturer aiming a category 2 for the first test with the

primary inlet little open. For the second test the manufacturer was looking for a category 1 and the 

primary inlet was fully close, but at 10Lbs the load stop burning and this test was a failure due to stop 

burning. Run 3 was aiming for a category 3 but fall in a category 4. For the run 4, the category 3 was meet 

with success. At run 5, a category 1 is aiming and meet with success at 0.796Kg/hr. Run 6 is the maximum 

burn rate with the primary inlet fully open. Run 7 & 8 were made to confirm the overall efficiency in 

category 3. 

3.2 UNIT DIMENSIONS

Baffle

• Location: between top of combustion chamber and hearth 

• Restriction: 2 X (2 1/2 in x 6 1/2 in.) at the front of unit 

• Dimensions: covers the hearth area minus the restriction at front 

• Material: Stainless steel 

Bricks

• Inside Firebox chamber refer to appendix 6 (soapstone guide) 

Flue gas exhaust

• Location: top flue located at the top, or back flue located at the back 

• Dimensions: 6 in. diameter 

• Material: cast iron 

Gasket

• Location: door, window, casing and catalyst. Refer to appendix 6 (gasket list) for details. 

Overall unit dimension

• Firebox dimensions : 22.5 in wide x 17.75 in. deep x 11.34 to 16.30 in. high 

• Usable volume : 3.22 cuft 

Convection fan

• Manufacturer : No blower supplied with unit 

• Model : N/a 

• Air flow : N/a 
Napierville, Jan. 23rd, 2014 

Client : Woodstock Soapstone 

Project :P-1212 

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Catalyst

• Dimensions: 5.25 X 10 X 2.625 in. 

• Number cell/sqin: 49 cpsi 

• Location: on the top of combustion chamber 

• Make, model: PG-K-535 Catalyst , Durafoil 

• Accessibility: To remove, lift the top and slide from the opening 

Catalyst bypass mechanism

• 20 in. x 3 in. 

• Location: on the top of combustion chamber 

• Method of control: A trap that closes by gravity, activated through a dandle in front of the unit 

above the window. 

3.3 AIR SUPPLY SYSTEM

Description 

• Primary air: window wash design with air intake at the back of unit 

• Secondary air: secondary baffle design with air intake at the back of unit 

Characterization 

The following table shows the inlet and outlet sections of each system. The air introduction system 

number is referred on a set of drawings in Appendix 6. 

AIR INTRODUCTION SYSTEM INLET (1) sq. in. OUTLET 

Identification Type Imin Imax Controlled (sq. in.) 

A * Primary nozzles 0.500 0.500 no 

0.027 

(2 holes of 0.187 dia.) 

B * Primary Airwash 0.000 3.820 

Manual 

adjustment 

5.313 

(0.3125" X 17") 

C * Secondary fireback 0.175 4.064 

Manual 

adjustment 

3.655 

(113 holes of 0.203" dia.) 

D * Catalyst Air 0.000 1.790 

Automatic 

adjustment 

(Bimetal coil) 

1.533 

(20 Holes of 0.3125" dia.) 

* This section would be filled by measuring and comparing with the manufacturer’s drawings included in

the test report . 

Legend

Identification: Tag name referred on drawings in Appendix 14, section airflow pattern 

Type: Characterization of air intake 
Napierville, Jan. 23rd, 2014 

Client : Woodstock Soapstone 

Project :P-1212 

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Imin: Minimum air intake of a particular air channel 

Imax: Maximum air intake of a particular air channel 

Controlled: Determines if a provision for air control is present 

Outlet: Total air outlet of a particular air channel 

Note: surfaces are expressed in sq. Inches 

3.4 OPERATION DURING TEST

Run #1 

This run was performed on October 16th , 2013. It lasted 550 minutes and a category 2 burn rate was 

obtained at 0.94kg/hr, With emission 0.83g/hr. 

Run #2 (failed test) 

This run was performed on October 17th , 2011. The load of the unit stop burning at 10Lbs, a category 1 

was targeted 

Run #3 

This run was performed on October 21st , 2013. It lasted 229 minutes and a category 4 burn rate was 

obtained at 2.15kg/hr, With emission 0.81g/hr. For this test a category 3 was targeted and missed, the 

primary air inlet was not fully open. another test for category 3 and 4 will be done. 

Run #4 

This run was performed on October 22nd , 2013. It lasted 288 minutes and a category 3 burn rate was 

obtained at 1.7kg/hr, With emission 1.05g/hr. 

Run #5 

This run was performed on October 23rd , 2013. It lasted 613 minutes and a category 1 burn rate was 

obtained at 0.796kg/hr, With emission 0.7g/hr. 

Run #6 

This run was performed on October 24th , 2013. It lasted 124 minutes and a category 4 burn rate was 

obtained at 4.06kg/hr, With emission 2.4g/hr. 

Run #7 

This run was performed on October 30th , 2013. It lasted 268 minutes and a category 3 burn rate was 

obtained at 1.85kg/hr, With emission 1.4g/hr. 
Napierville, Jan. 23rd, 2014 

Client : Woodstock Soapstone 

Project :P-1212 

Page 13 of 29 

Run #8 

This run was performed on November 1st , 2013. It lasted 398 minutes and a category 3 burn rate was 

obtained at 1.26kg/hr, With emission 1.2g/hr. 

• Details: Refer to the front page of each test run data sheets found in appendix for the detailed 

test sequence showing air supply settings and adjustments, fuel bed adjustments and 

operational specifics of the test unit. 

Test fuel cribs 

• Type of wood: Douglas fir, grade c or better, 19 to 25% dry basis moisture content 

• Description: for each test, description of the fuel crib is found on the front page of each test run 

data sheet together with photograph in appendix. 

 

3.5 STAR-UP OPERATION

The complete manufacturer’s firing procedure of each burn rate category is fully described in appendix

13. 

Sampling systems 

3.6 SAMPLING LOCATIONS

Particulate samples are collected from the dilution tunnel at a point 15 feet from the tunnel entrance. The 

tunnel has two elbows and two mixing baffles in the system ahead of the sampling section. The sampling

section is a continuous 10 foot section of 6 inch diameter pipe straight over its entire length. Tunnel 

velocity pressure is determined by a standard pitot tube located 48 inches from the beginning of the 

sampling section. Thermocouple is installed on the pitot tube to measure the dry bulb temperature. MC

is assumed, as allowed, to be 4%. Tunnel samplers are located 56 inches downstream of the pitot tube 

and 16 inches upstream from the end of this section. 

3.7 DRAWINGS

Various drawings of the stack gas sampling train and of dilution tunnel system are found in Appendix 1.

3.8 EMISSIONS EFFICIENCY TESTING EQUIPMENT LIST

The complete test equipment list together with all corresponding calibration data can be found in 

Appendix 3. 

 

4 SAMPLING METHODS