I asked this same question. What if a cat was placed in the everburn chamber. I got a smile then then news of the invention of super cat combustor came out I did not ask about a new improved combustor. Vc vollenteerred the additional imformation. I then asked their plans for the Intrepid II? Are you going to introduce everburn to them? Again a smile but no further info. Let me interpet and guess here. The cat combustor is small in the Intrepid II, meaning it would be the easiest one to introduce the super combustor to The least effected by cost. No VC did not confirm this but they did not deny it either. I mean their head of engineering took the model parts and positioned them explaining the everburn technology which carries a life time warranty. This also was illustrated on a black board before the tour and the modeling during the tour. One has to understand under 2 grams per hour is considered good real good .7 has never been done and this w is done without a cat combustor What would a super combustor do in that secondary burn chamber? Before the Epa listed all non cat stoves at 63% effeciencies VC had listed the everburn Encore and tested it to 82.5% effecient This is where common oil burners and pellet stoves opperate. Remember the secondary burn chamber is like a mini gassification burning chamber. The feeling I got VC was very proud at developing the cleanest burning stoves ever but they were also researching to improve on that. Not just wood stoves but also in ZC fireplaces. Some how Englander got their NC-30 down to 1.6 grams per hour that;s amazing for that size firebox. BB is reaping the benifits of that technology. Credit also goes to PE the summit is not just squeaking by the 7.5 gph. they with EBT, have calmed that beast down to 1/2 the required gph. I am also willing to bet, they too are not sitting pat and are working to improve their design. A current post points out that there exist an atti wood burning forum. I think we should applaud all efforts to introduce new technology for cleaner burning. I know as with any new technology and designs, there will be some glitches, bumps in the road. It is my hope they are worked out and negativity does not stiffull inovations. A better title to this post might be cleaner burning and not cat vs non cat. I do not resent PE stoves their quality or market place. I resent them being pushed into every post here and as the only alternative stove out there. I'm not alone with this thinking or the following post would not have thousands of views Some have situations ,that require rear exit exhaust, suggestion a top exit PE product to that situation is useless. A few PE owners have dominated so many post they are suffering from backlash from others tired of hearing it. Or hearing their choices are inferior, because they did not purchase a PE product.. They even initate post to try to discredit owners who purchased Woodstock stoves or any other stove but a PE stove. They are also quick to pass negative comments to other manufactures trying to bring cleaner burning to the market when any other manufacture has a dis gruntled consumer. this too adds to a backlash effect.