Phone (518) 326-5444 FAX (518) 274-5454

2800 7TH Avenue

Troy, NY 12180-1587

Renewable Heat NY

NYSERDA

17 Columbia circle

Albany, NY 12203

August 27, 2014

RE: Call for Qualified Wood Pellet Boiler Technologies for Renewable Heat NY

Dear Sir/Madam,

Evoworld is pleased to submit an additional testing report for our P14 model in order to ensure this high 

performance wood pellet boiler qualifies for the Renewable Heat NY program. The testing was done to EN303.5 by 

Francisco Josephinum Wieselburg BLT which is consistent with the requirement of an independent, third party that is 

technically competent to conduct the performance testing and analyze the results. 

The summary table below shows that each of our models meets the requirements. The spreadsheet for the 

conversion calculations is attached. 

Summary

Unit 14P 25P 50P 100P 200P

Efficiency on HHV 88 85 90 88 87

PM2.5 (Dust and VOC) lb/mmBtu 0.016 0.019 0.014 0.019 0.023

CO at 7% O2 PPM 57 212 28 74 20

Please let us know if any additional information is required. We look forward to being active participants in the 

Renewable Heat NY and other similar programs.

Thank you,

Lou Okonski

President

Enclosures: 

Testing reports for the 25, 50, 100 and 200 kW pellet units, our warranty information, and conversion calculations.
1 B C D E F G I J K L M N

2

3 14P 25P 50p 100P 200P 14p 25p 50p 100P 200P

4 Water content kg/kg (Moisture wet basis) 0.105 0.074 0.058 0.068 0.060 Water content lb/lb (Moisture wet basis) 0.105 0.074 0.058 0.068 0.060

5 Efficiency (LHV) 94.9 90.8 96.2 94.8 92.9 Efficiency (LHV) 94.9 90.8 96.2 94.8 92.9

6 Fuel energy content MJ/kg (ash and water free) 19 19.1 18.8 18.9 19.1

Fuel energy content btu/lb (ash and water free) 

=C6*948/2.2 8187 8230 8101 8144 8230

7 Hydrogen content 0.055 0.057 0.058 0.058 0.058 Hydrogen content 0.055 0.057 0.058 0.058 0.058

8

9

Energy of fuel

I6*(1-I4) 7328 7621 7631 7590 7737

10 Unit 14P 25P 50P 100P 200P

Losses due to MC

970 Btu/lb*I4 102 72 56 66 58

11 Efficiency on HHV 88 85 90 88 87

Losses due to H20 Combustion

(8*I7+I7)*(1-I4)*(970) 430 461 477 472 476

12 PM2.5 (Dust and VOC) lb/mmBtu 0.016 0.019 0.014 0.019 0.023 LHV I9-I10-I11 6796 7089 7098 7053 7202

13 CO at 7% O2 PPM 57 212 28 74 20

Energy output based on LHV

I5/100*I12 6449 6437 6828 6686 6691

14

Efficiency based on HHV

I13/I9 0.880 0.845 0.895 0.881 0.865

15

16 Dust mg/MJ 6 7 5 7 9

17 VOC mg/MJ 1 1 1 1 1

18

Total lb/MMBtu 

(I16+I17)*1 Lb/453592 mg*1 J/0.000947 Btu 0.0163 0.0186 0.0140 0.0186 0.0233

19 CO at 10% (13% 14P) O2 mg/m^3 42 190 25 66 18

20

CO PPM at 10% (13% 14P)

I19*24.45/28.01 36.7 165.9 21.8 57.6 15.7

21

CO at 7% O2 ppm (14P)

I20*((20.9-7)/(20.9-10)) : J20*((20.9-7)/(20.9-13) 57 211.5 27.8 73.5 20.0

Please note the 25P was tested with higher moisture content pellets. In the US the moisture content 

of pellets should be around 5% which provides an increase in efficieny of a few more tenths. 

Additionally the unit has undergone some small but important modifications to the combustion 

chamber to improve the combustion performance. Our in house testing using a Testo 320 

combustion analyzer set to 10% moisture wood shows a combustion efficiency of 88-89%. The actual 

value should be slightly higher as the pellets used have a moisture content <10%. The thermal 

efficiency is approximately 2% less than the combustion efficiency based on a decently insulated 

boilers- which describes our boilers. Additionally the control system has been upgraded which 

improves combustion performance. With this in mind it is reasonable to round up the efficiency 

from 84.5% to 85%. We will be testing the 25P at Brookhaven National Lab and will submit the test 

data upon completion. 

From Test Reports Conversion to English Units and NYSERDA Standards

Summary

Calculations
Warranty

Evoworld warrants their boiler system against workmanship as follows:

Pressure vessel: 10 years

The pressure vessel includes those parts that contain the water that is heated and distributed to the heating 

system. Such components include those that are necessary for maintaining the pressure in the system. 

Components not included are those that are welded, screwed, bolted, or otherwise attached to the pressure 

vessel such as valves, pumps, piping, sensors.

Thermal storage tank: 5 years

The thermal storage tank supplied by Evoworld is warrantied against workmanship for 5 years. This includes 

the storage tank, insulation, and fittings supplied with the tank by Evoworld.

A thermal storage tank that is not supplied by Evoworld is not warranted by Evoworld. Any warranty issues 

should be presented to the thermal storage tank manufacturer.

Steelwork: 5 years

Steelwork includes any metal components that are not considered part of the pressure vessel, thermal storage 

tank, or a wear part.

Electronics: 2 years

Electronics include components and their associated subcomponents such as, but not limited to: motors, fans, 

displays, control boards, temperature sensors, oxygen sensors, relays, transformers, wiring, proximity sensors, 

infrared sensors, inverters, heat control modules, igniters, potentiometers, and any similar component or 

subcomponent. The boiler must be installed with a surge protector or equivalent.

Wear parts: 1 year

Wear parts include any part exposed to movement and/or excess heat such as, but not limited to: gear boxes, 

augers, auger channels, pellet tubes, combustion chamber, cleaning mechanism components, fan blades, fuel 

level fork, and any other component similarly exposed to temperatures over 150 F and/or those that move.

Painted parts: 1 year

Painted parts include any part that has a painted finish and does not fall into any of the above categories. 

The warranty is immediately void under the following situations such as, but not limited to:

Failure to protect the boiler from the elements such as rain, snow, extreme heat, extreme cold, excess 

humidity, and liquid water; failure to protect the boiler from freezing; failure to install the near boiler mixing 

valve; failure to keep the return temperature above 55C (131F); use of non-woody fuel such as but not limited 

to, grass, corn, manure, agricultural products, cherry pits, garbage, plastic, and petroleum products; use of 

fuel other than wood pellets certified premium (or better) without any additives by the Pellet Fuel Institute in 

a pellet boiler; use of any petroleum or chemical additives to the fuel; wood chips that do not meet the 

G30/G50 requirement per ONORM 7133; lack of use of the recommended thermal storage volume; bypassing 

the recommended thermal storage volume; improper venting; overpressurization of the system; failure to 

pressurize the system i.e. installing it as an open system; failure to have the boiler inspected and serviced 
annually by a certified service technician; failure to conduct the maintenance as outlined in the operation 

manual; and accessing and/or altering settings within the service menu without explicit consent from 

Evoworld.

Evoworld shall not be held accountable for any problems with the boiler, thermal storage tank, peripheral 

electronics, property, or components, or any other connected systems due to misuse, mishandling, improper 

installation, poor water quality, lack of prescribed water treatment, voltage spikes or brownouts from the 

electric grid, normal wear and tear, or any action or situation reasonably considered beyond normal. 

Additionally, Evoworld shall not be held accountable for damages associated with circumventing safety 

features or unauthorized alterations or modifications to the boiler, boiler system, or boiler controls. 

Evoworld shall determine how to handle warranty claims and upon an accepted warranty claim, Evoworld 

shall at their sole discretion repair or replace components and/or associated subcomponents. Evoworld shall 

determine at their sole discretion which party is responsible for labor, shipping, and transportation costs.