I've got a full partially finished basement with tile floors and painted cinderblock walls under a 1952 ranch, about 2200 sq ft.total. No sump needed, no leaking, just musty. Have you heard of those basement systems where they vent through a hole in the footing and there's a sheet metal shaft mounted against a basement wall and it contains a fan and it's controlled by a humidistat? Supposedly draws good dry air from upstairs and vents musty air out the footing. The Wave is one system. Let me know if you think it would work. Currently running a small dehumidifier now with a fan, but during fall/spring when a/c and furnace not needed, musty smell builds up.