Liberator test data concerning air quality and emissions

Anyone who has experienced a proper RMH knows how clean they are in terms of ambient air quality, both in the structure and in the outgoing exhaust.  But the folks at Liberator have gone to great labor and expense to have their rocket stove tested, and the data is there.

The Liberator has a 114 page test results document on their faq page
faq: https://rocketheater.com/faq-1/
testing doc: https://drive.google.com/file/d/158PaYsJgoC2AycyxRR3EJROigF74g0X_/view?usp=sharing

The tests were specific to the use of pellets and the optional pellet hopper, but I believe performance is similar with wood combustion.  Can anyone speak to this assessment?

I am wondering if some folks that are more accustomed to looking at this sort of data would mind combing through it a bit and provided a sort of "layman's interpretation" of their findings, and how they might relate to other heating methods.

Seems like summary data is on pp 21-22, and epa certifcation doc is on pp 91-92.  

Specifically, I'm looking for concrete data on EPA certification for air quality as measured by particulate.  

I think this is the specific bit of data I would like to be able to succinctly back up (from p99):

Thank you for your purchase of the Liberator Rocket Heater. As you may already know, the RocketHeater is among the cleanest burning stoves available in the North American market, possessing a HHV ranging
from 68.5% to 79.7%, an emissions output of 0.38 to 1.66 grams per hour of solid particulate, 0.02 to 0.37
grams per minute of CO, and combustion efficiency of up to 99.5%. As such, this heater is compliant to EPA
2020 NSPS standards. The tests were conducted by PFS Teco using pellet fuel in accordance with ASTM
E2779 with Liberator RMH2 ATM single burn rate pellet heaters dated 09/09/2021 EPA OAQPS. According to
independent testing from Aprovecho Research and PFS Teco, the heat output range varies from 27,000 BTU’s
to 33,000 BTU’s per hour. This owners manual will assist you in the proper use, maintenance, installation, and
safety precautions to undertake in the heater's operation and installation.

(bold mine)

Data summary screen shots attached.

Beau Davidson wrote:Specifically, I'm looking for concrete data on EPA certification for air quality as measured by particulate.  

I think this is the specific bit of data I would like to be able to succinctly back up (from p99):

Thank you for your purchase of the Liberator Rocket Heater. As you may already know, the RocketHeater is among the cleanest burning stoves available in the North American market, possessing a HHV ranging
from 68.5% to 79.7%, an emissions output of 0.38 to 1.66 grams per hour of solid particulate, 0.02 to 0.37
grams per minute of CO, and combustion efficiency of up to 99.5%. As such, this heater is compliant to EPA
2020 NSPS standards. The tests were conducted by PFS Teco using pellet fuel in accordance with ASTM
E2779 with Liberator RMH2 ATM single burn rate pellet heaters dated 09/09/2021 EPA OAQPS. According to
independent testing from Aprovecho Research and PFS Teco, the heat output range varies from 27,000 BTU’s
to 33,000 BTU’s per hour. This owners manual will assist you in the proper use, maintenance, installation, and
safety precautions to undertake in the heater's operation and installation.

(bold mine)

Data summary screen shots attached.

Beau one thing I would like to see myself would be a side by side lab report on an auger fed pellet stove and the Liberator. I think it would give a good comparison as the tests were run on pellets. I must say its test results look very impressive. It would be overkill in my house but a great looking unit.

Beau Davidson wrote:Specifically, I'm looking for concrete data on EPA certification for air quality as measured by particulate.  

I think this is the specific bit of data I would like to be able to succinctly back up (from p99):

Thank you for your purchase of the Liberator Rocket Heater. As you may already know, the RocketHeater is among the cleanest burning stoves available in the North American market, possessing a HHV ranging
from 68.5% to 79.7%, an emissions output of 0.38 to 1.66 grams per hour of solid particulate, 0.02 to 0.37
grams per minute of CO, and combustion efficiency of up to 99.5%. As such, this heater is compliant to EPA
2020 NSPS standards. The tests were conducted by PFS Teco using pellet fuel in accordance with ASTM
E2779 with Liberator RMH2 ATM single burn rate pellet heaters dated 09/09/2021 EPA OAQPS. According to
independent testing from Aprovecho Research and PFS Teco, the heat output range varies from 27,000 BTU’s
to 33,000 BTU’s per hour. This owners manual will assist you in the proper use, maintenance, installation, and
safety precautions to undertake in the heater's operation and installation.

(bold mine)

Data summary screen shots attached.

So I found one here for a newer pellet stove done to the newer testing parameters.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwjD0ff-1db8AhW-GzQIHWuJCHAQFnoECEEQAQ&url=https%3A%2F%2Fdownloads.hearthnhome.com%2Fcommunications%2FEPA%2520Test%2520Report%2520Summaries%2FPelPro%2FPP130-B%2520Test%2520Report.pdf&usg=AOvVaw3lCpNnM70mltymRfdmFSSB

Its performance and emissions would "beat" the Liberator but at the cost of a blower fan an auger and much electronics.



I sampled a selection of better north american stoves. The non catalytic ones were soso as I would expect... A link to pacific energy which I've used and liked. HIgh CO and particulate emisions.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwjHxMb72tb8AhUqFzQIHe9vDTcQFnoECA0QAQ&url=https%3A%2F%2Fwww.pacificenergy.net%2Fwp-content%2Fuploads%2Fsites%2F2%2F2020%2F05%2FFP25-LE-Complete-Test-Report-for-Upload.pdf&usg=AOvVaw3uDUmC9QFUagNgUziyc5Cx

I sampled a link to testing on a Jotul catalytic which is almost identical to the liberator results wise. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwiZlYum2db8AhUzJzQIHaaOAW0QFnoECA4QAQ&url=https%3A%2F%2Fwww.jotul.com%2Fsites%2Fusa%2Ffiles%2Fproducts%2FF%2520602%2520V2%2520Non-CBI%2520EPA%2520Report%2520.pdf&usg=AOvVaw3EcJY3oq7LTjI2KPPQCr0h
chart of results page 8

My synopsis would be the liberator would be comparable efficiency wise and emisions wise to the better of the catalytic european stoves. The Liberator was tested with pellets, the catalytic stoves and standard woodstoves cordwood so that is a grey area for me I would have liked to see its cordwood results to compare apples to apples. The liberator would not match a pellet stove but I wouldnt expect it to as its a freestanding non electric unit so again apples to apples. I would have liked to know how the stove performed in a lower burn scenario if that is even possible as all the other stoves did in their testing.
As an note I have found anecdotally that when people compare results for their rocket stoves they usually use as a benchmark really poor examples of woodburners that they replaced with their Rocket stoves making direct comparisons difficult to quantify.