In upstate NY, I run a Frigidaire 70 pint dehumidifier set at 45% humidity from May thru October in my 800 sq ft basement, with a drain hose to the sump crock. Basement is constructed of Superior walls (5000+ PSI pre cast concrete, pre insulated). The rest of the year I run a fan to circulate air. This setup has worked great for 20+ years in 2 houses (albeit with multiple dehumidifiers). Over the years I have found that most dehumidifiers die right after the compressor warranty runs out, although the last one died just before then and I got a brand new $200 one for no charge from local Frigidaire dealer.