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The Benefits Of A Hybrid Stove.
This tutorial answers common questions about hybrid stoves.
LEarn Kuma 2020 Wood Stoves
K-180 and K-250 Series

What is a hybrid stove?
A hybrid stove combines 2 distinct burn systems into the firebox each with their own unique advantages. The first is the thermal combustion system (burn tubes). Burn tubes work great at temperatures above 1000° delivering secondary combustion air to incinerate most of the smoke.
The second is the catalytic combustor system which lowers the temperature at which wood smoke will burn down to 500° so on medium and low burn rates, hybrid stoves will continue to burn super clean and efficient.

What is a  catalytic combustor?
A combustor is a device that lowers the temperature at which wood smoke burns. This converts smoke and unwanted pollution into useable energy for your home, especially during lower burn rates.

Do hybrid stoves burn cleaner than non-catalytic stoves?
Yes, In every burn rate exept high, a hybrid stove provides a cleaner burn than non-catalytic stoves:
On average, wood stoves spend over 80% of their life in the low to medium burn rates.

How does the stove operate compared to a non-catalytic stove
In addition to the primary air control, a simple bypass lever allows you to quickly heat up the chimney when starting your stove.
 
Does a catalytic stove require more maintenance?
Unlikely, Reduced smoke from a hybrid stove will result in less chimney maintenance (cleaning). Additionally, maintenance is easier than ever in a well-designed hybrid stove.  The catalytic can remain in place during any cleaning or maintenance of the stove.  If needed, the all-metal catalytic can be removed in seconds with no chance of damage.

Is there a restriction on what fuel I can burn?
No more than any other stove: All wood stoves are required to have an extensive list of prohibited fuels that include glossy paper and chemically treated materials. If you shouldn’t burn it in a hybrid stove, you shouldn’t burn it in any stove.

How long will a catalytic last?
Omni Environmental Laboratories, an independent test lab, performed a study on the effectiveness of catalytic combustors over time. The data showed that after 9 years of use, a stove equipped with a combustor is still cleaner and more efficient than non-catalytic stoves.  Additionally, the warranty on a Kuma Hybrid combustor is 12 years: That is 7 years longer than some manufacturers will warrant their entire stove.

How do I know if my catalytic stops working?
With a hybrid stove, the thermal combustion system (burn tubes) does most of the work so you will likely not notice any reduction in performance over time.
If performance begins to drop, you will notice more smoke exiting the chimney than usual.

Are Combustors unreliable or fragile?
No, an all-metal combustor encased in thick stainless steel is just as durable as any other baffle component in a stove.

Why do newer stoves have them?
To achieve longer burn times and higher efficiency than non-catalytic stoves. If you compare the burn rate and efficiency from each stove’s official test data, you will find the hybrid stove to be unquestionably superior.