By no tubes, are you referring to their baffle system? I heard they may be a bit more robust than the Regencys. Plus I do like their side blower system. Really the one negative about the Super for us is it has the smallest glass of those inserts I'm currently looking at. That was a big plus for the Neo, but their 1.6 seems too small and the 2.5 seems quite large for this place. That said, the 2400 may still be a bit big.My vote would be for the Super. It has no tubes. Gets a longer burn, loads N/S and E/W. Member Dix has this stove heating her place in NY state.