Esse Engineering WarmHeart User manual

Non-Confidential Business Information
(Non-CBI)
Certification Test Report
Esse Engineering Ltd.
Models: WarmHeart, BakeHeart
Wood-Fired Freestanding Room Heater, Non-Catalytic
Prepared for: Esse Engineering Ltd.
3131 Baptiste Rd. Mill Bay
B.C. Cananda, VOR 2P3
Prepared by: OMNI-Test Laboratories, Inc.
13327 NE Airport Way
Portland, OR 97230
[phone]
Test Period: December 15, 2020 – December 16, 2020
Report Issued: April 27, 2021
Report Number: 0224WS009E
All data and information contained in this report are confidential and proprietary to Esse
Engineering Ltd. Its significance is subject to the adequacy and representative character of
the samples and to the comprehensiveness of the tests, examinations, or surveys made. The
contents of this report cannot be copied or quoted, except in full, without specific, written
authorization from Esse Engineering Ltd. and OMNI-Test Laboratories, Inc. No use of the
OMNI-Test Laboratories, Inc. name, logo, or registered mark (O-TL) is permitted, except as
expressly authorized by OMNI-Test Laboratories, Inc. in writing.
-Document Edition # 000 (4/27/21) -

Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
AUTHORIZED SIGNATORIES
This report has been reviewed and approved by the following authorized signatories:
Evaluator:
__________________________
Bruce Davis, Testing Manager
OMNI-Test Laboratories, Inc.

Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
TABLE OF CONTENTS
PREFACE...............................................................................................................(3 pages)
1. SAMPLING PROCEDURES AND TEST RESULTS........................................................4
Introduction..........................................................................................................................5
Individual Run summaries ...................................................................................................6
Summary Tables
Table 1 - Particulate Emissions Results...............................................................................7
Table 2 - Particulate Emissions Results (First Hour)...........................................................7
Table 3 – B415.1 Efficiency and CO Emissions .................................................................7
Table 4 - Test Facility Conditions .......................................................................................8
Table 5 – Kindling and Start-up Fuel Description Summary ..............................................8
Table 6 - Fuel Measurements and Cordwood Descriptions - Test.......................................9
Table 7 - Dilution Tunnel Gas Measurements and Sampling Data .....................................9
Table 8 - Test Configurations ............................................................................................10
2. PHOTOGRAPHS/APPLIANCE DESCRIPTION/DRAWINGS......................................11
Fuel Photographs ...............................................................................................................13
Appliance Description .......................................................................................................18
3. TEST DATA BY RUN......................................................................................................19
Run 1..................................................................................................................................26
Run 2..................................................................................................................................44
Run 3..................................................................................................................................54
Run 4..................................................................................................................................62
4. QUALITY ASSURANCE/QUALITY CONTROL ..........................................................72
Sample Analysis.................................................................................................................74
Calibrations – ASTM E2515, ASTM E3053.....................................................................84
Example Calculations ......................................................................................................100
5. LABELING & OWNER’S MANUAL............................................................................112
Appendix A Alt-125 E3053 Letter
Appendix B Revision History Table

Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
Section 1
Sampling Procedures and Test Results
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Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
INTRODUCTION
Esse Engineering Ltd. retained OMNI to perform U.S. Environmental Protection Agency (EPA)
certification testing on the WarmHeart Freestanding woodstove. The WarmHeart Freestanding
wood stove is a Non-Catalytic-type room heater. The firebox is constructed of mild steel. Usable
firebox volume was measured to be 1.09 cubic feet and the stove is vented through 6” flue collar
located on the stove top. Stove model BakeHeart shares the same firebox and emissions control
system, the oven under the firebox is the only difference. It was determined no additional testing
was required to include this design variant.
Testing was performed at Nelke Consulting. The altitude of the laboratory is 500 feet above sea
level. The unit was received in good condition and logged in on 12/15/20, then assigned and
labeled with OMNI ID #2400A. OMNI representative Bruce Davis conducted the certification
testing and completed all testing by December 16, 2020.
This report is organized in accordance with the EPA-recommended outline and is summarized in
the Table of Contents immediately preceding this section. The results in this report are limited to
the item submitted.
SAMPLING PROCEDURE
The WarmHeart wood stove was tested in accordance with the U.S. EPA 40 CFR Part 60,
Subpart AAA – Standards of Performance for New Residential Wood Heaters using ASTM
E2515 and EPA Alt-125, ASTM E3053. Particulate emissions were measured using sampling
trains consisting of two Teflon coated 47mm filters (front and back). See Appendix A for details
on EPA Alt-125.
The model WarmHeart was tested for thermal efficiency and carbon monoxide (CO) emissions
in accordance with CSA B415.1-10 using Maple cordwood. A spread sheet provided by CSA
was used to calculate efficiency values.
An ambient filter (Background) was not operated during this series, there were no operations in
the area that would have generated additional particulate into the ambient air. Running an
ambient filter can only reduce emissions by backing out any particulate not generated by fuel in
the appliance, it can never increase emissions. Tests conducted without an ambient filter are
worse case.
SUMMARY OF RESULTS
The weighted average emissions of the three test runs included in the results indicate a
particulate emission rate of 2.15 grams per hour. The WarmHeart results are within the emission
limit of 2.5 g/h for affected facilities tested with cordwood, manufactured on or after May
15, 2020.
The proportionality results for all 3 test runs were acceptable. Quality check results for each test
run are presented in Section 2 of this report.

Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
INDIVIDUAL RUN SUMMARIES
Run 1 - Test procedures followed to produce a high burn rate with a primary air setting of
fully open. Observed burn rate was calculated from a hot to hot cycle at 3.37
kg/hr. Emissions results were calculated using particulate sampling from kindling,
start-up fuel, and test fuel load combined (cold to hot). Burn rate, and efficiency
were calculated using data from the test fuel load only (hot to hot). Gravimetric
analysis of probe assemblies did not produce negative weights, train precision
meets specified limits. No sampling anomalies occurred, this test run was
determined to be valid and appropriate for inclusion in the weighted average.
Run 2 - Test procedures were followed to produce a low burn rate with a primary air
setting of full closed. Observed burn rate was calculated at 0.73 kg/hr. Emissions
and efficiency results were calculated using a hot to hot burn cycle, a coal bed
generated by the high burn procedure was used. Gravimetric analysis of probe
assemblies did not produce negative weights, train precision meets specified
limits. No sampling anomalies occurred, this test run was determined to be valid
and appropriate for inclusion in the weighted average.
Run 3 - Test procedures followed to produce a high burn rate with a primary air setting of
fully open. Observed burn rate was calculated at 2.77 kg/hr. Burn rate was
calculated using data from the kindling, start-up, and fuel load (cold to hot). No
sampling occurred, this test run was not included in the weighted average.
Run 4 - Test procedures were followed to produce a medium high burn rate with a
primary air setting of 6” from the left stove leg to the right edge of the air control.
Observed burn rate was calculated at 0.70 kg/hr. Burn rate was 0.03 kg/h slower
than the low burn operated at an air setting of full closed due to the way the logs
fell during the combustion process, coal bed adjustment with intent to increase
combustion occurred at 4 hours 50 minutes into the test due to 0 weight loss in 10
minutes. Emissions and efficiency results were calculated using a hot to hot burn
cycle, a coal bed generated by a high burn conducted in test three was used.
Gravimetric analysis of probe assemblies did not produce negative weights, train
precision meets specified limits. No sampling anomalies occurred, this test run
was determined to be valid and appropriate for inclusion in the weighted average.
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Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
Table 1 – Particulate Emissions
Run
Burn Rate
Calculated from a
Hot to Hot burn
cycle
(kg/h dry)
ASTM E2515
Emissions
(g/h)
ASTM E3053
Weighting Factor
(%)
ASTM E3053 Weighted
Emissions
(g/h)
1 3.37 14.44 20 0.888
2 0.73 1.85 40 0.740
4 0.70 1.30 40 0.520
The sum of weighted particulate emission of 3 test runs: 0.888 + 0.740 + 0.520 =
2.15 grams per hour.
1. Based on a cold start including kindling and start-up fuel.
Table 2 – Particulate Emissions (First Hour)
Run
ASTM E2515
Emissions – First Hour
(g/h)
1 3.21
2 5.80
4 3.89
Table 3 – B415.1 Efficiency and CO Emissions
Run
Heat
Output
(BTU/h)
HHV
Efficiency
(%)
LHV
Efficiency
(%)
CO Emissions
(g/MJ Output)
CO Emissions
(g/kg Dry Fuel)
CO Emissions
(g/min)
1 48,685 74.4 79.5 5.58 79.50 1.526
2 10,486 75.9 81.2 7.41 112.36 1.365
4 10,001 75.4 80.7 5.51 82.98 0.968
Weighted average HHV efficiency of three test runs: 14.88 + 30.36 + 30.16 = 75.4%.
Average CO Emissions of three tests: (1.526 + 1.365 + 0.968) / 3 = 1.286 g/min
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Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
Table 4 – Test Facility Conditions
Run
Room Temperature
(°F)
Barometric Pressure
(Hg)
Air Velocity
(ft/min)
Before After Before After Before After
1 64 66 29.42 29.45 <50 <50
2 68 66 29.45 29.52 <50 <50
3 67 68 29.22 29.20 <50 <50
4 68 66 29.19 28.96 <50 <50
Table 5 – Kindling and Start-up Fuel Description Summary
Maple Cordwood
Run
Kindling
Weight
Wet Basis
(lbs)
Start-up
Fuel Weight
Wet Basis
(lbs)
Residual
Start-up
fuel weight
(lbs)
1 2.00 3.00 1.3
3 2.10 3.20 1.3
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Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
Table 6 – Fuel Measurement and Cordwood Description Summary – TEST
All tests conducted using Maple Cordwood
Run
Test Fuel
Wet Basis
(lbs)
Firebox
Volume
(ft3)
Fuel Loading
Density Wet
Basis
(lbs/f
t
3)
Test Fuel
Dry Basis
(lbs)
Test Fuel
Consumed
During Test
Dry Basis (lbs)
Nominal
Piece
Length
(in)
1 10.5 1.09 9.6 8.56 + 4.21 10.5 [email protected]
2 12.6 1.09 11.6 10.3 10.3 [email protected]
3 10.8 1.09 9.9 8.65 + 4.53 10.8 [email protected]
4 12.6 1.09 11.6 10.2 10.2 [email protected]
Table 7 – Dilution Tunnel Gas Measurements and Sampling Data Summary
Run
Length of Test
(min)
Average Dilution Tunnel Gas Measurements
Velocity
(ft/sec)
Flow Rate
(dscf/min)
Temperature
(°F)
1 99 19.61 213.3 91
2 385 20.17 225.6 77
4 395 19.91 219.5 77
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Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
OMNI-Test Laboratories, Inc.
Table 8 – Test Configurations
Run Startup Procedures Combustion Air
1
Fuel Loading: Kindling and start-up fuel loaded together; a torch was used
for 60 seconds to establish a top-down fire. At 37 minutes placed fuel load
into the firebox. Loading required less than 1 minute to complete.
Door: For kindling and start-up fuel, loading door was closed by 150
seconds. Test fuel load: fuel loading door was closed 2 minutes and 30
seconds after loading.
Primary Air: Air control fully open for the entire test.
Secondary: No user control for secondary air.
Fan: N/A
Bypass: N/A
Fully open for
entire test.
2
Fuel Loading: Test fuel loaded onto coal bed generated by test number 1 by
45 seconds.
Door: Closed by 3 minutes.
Primary Air: Fully open, then set to full closed by 12 minutes.
Secondary: No user control for secondary air.
Fan: N/A
Bypass: N/A
Fully open for first
12 minutes, then
set to full closed.
3
Fuel Loading: Kindling and start-up fuel loaded together; a torch was used
for 60 seconds to establish a top-down fire. At 40 minutes placed fuel load
into the firebox. Loading required less than 1 minute to complete.
Door: For kindling and start-up fuel, loading door was closed by 150
seconds. Test fuel load: fuel loading door was closed 2 minutes and 30
seconds after loading.
Primary Air: Air control fully open for the entire test.
Secondary: No user control for secondary air.
Fan: N/A
Bypass: N/A
Fully open for
entire test.
4
Fuel Loading: Test fuel loaded onto coal bed generated by test number 3 by
40 seconds.
Door: Closed by 2 minutes 30 seconds.
Primary Air: Fully open, then set to 6” from left leg by 15:30 minutes.
Secondary: No user control for secondary air.
Fan: N/A.
Bypass: N/A
Fully open for first
15.5 minutes, then
set to 6” from left
leg.
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Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
OMNI-Test Laboratories, Inc.
Section 2
Photographs/Appliance Description/Drawings
11 of 161

Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
OMNI-Test Laboratories, Inc.
Esse Engineering Ltd.
WarmHeart
Test Dates: August 4, 2020 – August 5, 2020
12 of 161

Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
OMNI-Test Laboratories, Inc.
Esse Engineering Ltd.
WarmHeart
Run 1 – Kindling and start-up fuel Run 1 Kindling and start-up fuel
Run 1 – Ignition of kindling Run 1 Fuel load
13 of 161

Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
OMNI-Test Laboratories, Inc.
Esse Engineering Ltd.
WarmHeart
Run 1 Test Fuel Load In Stove Run 1 Remaining Coal Bed
Run 2 Test Fuel Load Run 2 – Test Fuel Loaded into Stove
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Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
OMNI-Test Laboratories, Inc.
Run 3 – Kindling and start-up fuel Run 3 Ignition of kindling
Run 3 – Test Fuel Load Run 3 – Test Fuel Loaded into Stove
15 of 161

Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
OMNI-Test Laboratories, Inc.
Run 3 - Remaining Coal After Test Run 4 – Test Fuel Load
Run 4 – Test Fuel Loaded into Stove Run 4 – Air control setting
16 of 161

Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
OMNI-Test Laboratories, Inc.
Run 4 – Coal bed prior to stir Run 4 – Coal bed after stir
Run 4 - Remaining Coal After Test
17 of 161

Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
OMNI-Test Laboratories, Inc.
WOOD HEATER DESCRIPTION
Appliance Manufacturer: Esse Engineering Ltd.
Wood Stove Model: WarmHeart, BakeHeart
Type: Freestanding Non-Catalytic Wood Fired Room Heater
WOOD HEATER INFORMATION
Materials of Construction: The unit is constructed primarily of cast iron and mild steel.
The firebox is lined with fire compressed vermiculite panels that measures 12.0” x 13.9”
at the rear. The feed door has a 12.8 x 9.4 glass panel and 13mm diameter glass fiber seal.
Air Introduction System: Air is introduced into three different areas of the fire chamber
and is controlled by one sliding control rod. Secondary air is introduced into the rear of
the fire box through the bottom, it is then channeled up into the secondary air tubes
located under the baffle. Air wash air is introduced through an opening in the bottom of
the fire box. It is then channeled up to a manifold across the top of the door, air is
directed down across the glass and into the fire chamber. A lower primary air orifice is
mounted on the firebox floor near the loading door. Air is routed through the bottom of
the firebox and into the lower orifice manifold, it is then directed horizontally into the
coal bed near the front of the combustion chamber.
Combustion Control Mechanisms: Combustion air control mechanism is a sliding rod
with flat plates attached that cover and uncover air inlets when the rod is moved from left
to right.
Combustor: N/A
Internal Baffles: A fire brick baffle is mounted above the secondary air tubes, a ½” thick
ceramic wool blanket rests on top for additional firebox insulation.
Other Features: The BakeHeart model has an oven mounted below the firebox, oven is
heated by heat transfer through the firebox bottom, flue gas passageway is not directed
around the oven. Additional testing was not required to include this model design.
Flue Outlet: The 6” diameter flue outlet is located at the rear of the top of the appliance.
WOOD HEATER OPERATING INSTRUCTIONS
Specific Written Instructions: See Section 4 of this report. All markings and
instruction materials were reviewed for content prior to printing.

Esse Engineering Ltd.
Model: WarmHeart, BakeHeart
Project Number: 0224WS009E
OMNI-Test Laboratories, Inc.
Section 3
Test Data by Run
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OMNI-Test Laboratories, Inc.
Conditioning Data - ASTM E3053/ ASTM E2515
Manufacturer:
Model:
Tracking No.:
Project No.:
Test Date:
Technician:
Operation Category:
Elapsed Time
(hr) Scale(lb) Flue (F) Elapsed Time (hr) Scale(lb) Flue(F)
00.0 221.6 26 2.8 354.0
15.2 301.0 27 1.5 226.0
21.7 203.0 28 0.8 196.0
31.2 159.0 29 0.3 180.0
40.7 147.0 30 0.3 302.4
50.2 147.0 31 4.8 350.0
67.2 392.0 32 1.8 243.0
72.0 297.0 33 1.3 200.0
81.2 227.0 34 0.9 183.0
90.7 194.0 35 0.5 170.0
10 0.2 177.0 36 0.2 160.0
11 7.5 429.0 37 5.5 405.0
12 2.1 327.0 38 1.8 251.0
13 0.9 253.0 39 1.1 206.0
14 0.4 220.0 40 0.5 186.0
15 0.1 201.0 41 0.0 173.0
16 5.5 452.0 42 5.8 399.0
17 1.4 276.0 43 1.9 271.0
18 0.7 232.0 44 1.5 209.0
19 0.3 201.0 45 1.1 189.0
20 9.8 386.0 46 0.6 178.0
21 2.5 373.0 47 0.3 164.0
22 1.2 236.0 48 0.1 153.0
23 0.8 212.0 49 5.9 378.0
24 0.3 194.0 50 2.0 238.0
25 9.1 366.0
Technician Signature:___________________________
Medium
Esse
WarmHeart
2400A
0224WS0009E
Sept, Oct. 2020
Ben Nelke
Control No. P-SSAR-0003 High Burn Run 1 Emissions (003)-EsseWarmheart
Fuel moisture between 19 - 25% db, operated at a medium burn rate.
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