Hello to all, I am a first timer and after combing around a bit I have decided that this community seems quite a fitting venue for my predicament. I have a rental property that I have been renovating for quite some time now and in the basement there are plans for a new kitchen and 2 full bathrooms.

I am entertaining the idea of having a separate water heating system to service the basement. I am also entertaining the idea of a tankless unit. I discussed the situation with a few local servicemen and I have received varying info.

All of them have suggested a gas unit with a flow rate capacity in the 5 GPM range. However some have suggested that I go with a unit with a “flow control” feature and others have suggested that I go with a unit with a “thermostatic” feature. And I seem to be receiving varying info regarding what each feature provides.

So I did my homework and referenced both features and fortunately I’ve been able to get what I believe is conclusive info regarding what exactly the “thermostatic” feature provides, (modulates the output gas depending on the varying incoming water temperature in order to ensure an accurate hot water temperature), but I for the life of me cannot seem to get any info regarding what exactly a “flow control” feature is… and the interesting thing is seemingly every manufacture claims that their units have “flow control”…

So in short my question is what exactly is meant when these manufacturers label their units “flow control” and are my findings correct with respect to the claim of a “thermostatic” feature?