We have a house that was also build in 2012. But we went with an ICF foundation (insulated concrete forms...simply stated, insulated forms that stay in place after the pour). Our basement stays a consistent 62-65 degrees all year.
In the winter, this actually helps with the heating as we gain some level of ground heat. We also have a wood stove there which makes it nice and toasty when in use.
In the summer, it's natural air conditioning. We run a DE-humidifier, and with the consistent 62-65 degrees, feels like nicely air-conditioned rooms. When it isn't so humid, we can open up the windows and doors (it's a walk-out basement) and it rises to the ambient outdoor temp.
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