Haddon Hall was one of the first apartment buildings ever to be constructed in the Cincinnati metropolitan area. Built in the 1890s, the structure is listed on the National Register of Historic Places and represents a significant part of the city’s architectural history. But for its new owners of what now serves as section 8 housing, Haddon Hall was a woefully inefficient building with costly energy bills. For its 200+ residents, the building, while charming, was inadequately heated in the winter and way too hot in the summer.