Best Of

What Viessmann calls the "E series" or the new B2HE or B1HE B1KE are all very similar now. There are 2 chassis sizes 85/120 (small) and 150/199 (large) the internals are the same across the board for same chassis size boilers, with the exception of the combi. Both have Lambda Pro plus, which was the big selling point for the 200 series in prior years, this is most likely why Viessmann has pushed the 100 much more recently.

There are still some fairly noticeable control differences between the two, the 200 series control is quite the upgrade, I still have a few that like to use it for the upgraded control, these are usually installed in jobs like mad dog is doing currently. The 200 control has built in cascade features, and can control viessmann accessories like mixing valves, it has the heating curve display right on the screen like the previous 200 series. If you have used the CM2 control, or the new CI2 control it is very similar to that, full color touchscreen very nice.

One neat feature that I don't see used often enough, the entire control enclosure can be relocated to the top of the cabinet. It can be a little confusing the first time doing this as you need to detach the plastic "light bar" from the control itself and turn it around, and the harness that is plugged into the enclosure will have to be moved the other plug on the back of the enclosure.


The extra weight of the unit comes from the front and back plates of the heat exchanger being made out of stainless steel now instead of aluminum, as well as a fixed baffle inside the heat exchanger. These were the 2 most requested features for Viessmann to implement from service techs, however the install crew is now learning that added weight can certainly be noticed!