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Viessmann Vitodens 100 vs 200?
Could someone tell me in detail what's the difference between the 100 and 200? The price difference between the two is around $1k-2k. Both have ~95% efficiency, but does that assume the 100 can achieve that efficiency with a stable gas quality while the 200 can achieve that even when the gas quality fluctuates because of the Lamda pro?
I am wondering if it's worth paying more for the 200. Thanks!