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- Golden, Colorado
I need some help understanding how to set my Navien NCB 240E. Most importantly, where I should set the max space heating capacity (50% - 100%). I have a 2,800SF house with 116 feet of fin-tube and 3 zones. I have the outdoor reset setup to the preset fin tube setting. Now, I see that my max space heating capacity is set to 100% which I'm sure is overkill for my home. This thing has been running terribly inefficiently and I'm trying my best to get it dialed in a little bit. Any help is much appreciated. Thanks!