Here is a table showing the improvement that we made to the Kuma Aspen wood stove:

2010 Kuma Aspen (Discontinued)

2020 Kuma Aspen LE

Comparison

 

 

When EPA finalized the 2015 NSPS, Kuma Stoves developed a new generation of cleaner stoves as shown in the results below.

Combustion System:

Thermal (Burn Tubes Only)

Combustion System:

Hybrid (Burn Tubes and Catalyst)

Best System for Emissions Reductions
 according to Washington State
 Department of Ecology and EPA.

Efficiency:

78% HHV

Efficiency:

81% HHV

3.8% improved efficiency.

Particulate Emissions:

4.2 g/hr

Particulate Emissions:

0.72 g/hr

6X less Particulate Emissions.

Manufacturing Repeatability:

Hand drawn designs, manually programmed manufacturing

Manufacturing Repeatability:

CAD Designs, CNC machine cutting and bending.

Higher Manufacturing Repeatability.

Testing Repeatability:

Method 28 Crib Tested

Never replicate tested

Testing Repeatability:

ASTM Cordwood tested
EPA Catalyst Equivalency tested  (ASTM)
EPA M28 Crib tested (for R&D)

All producing consistent results

Proven Repeatable through
several test series.