Built in 1936, the house with exception of a conventionally poured concrete floor is entirely constructed of post-tensioned twelve and fourteen foot concrete channel planks. Planks, 12 feet long, 4 feet wide with a 2 3/4 inch flange and a 3/8 inch, rod in each long flange, were used for inner and outer walls, partitions, and the ceiling. The planks for the roof and the ceiling of the largest room are 14 feet long by 2 feet wide with a 4 inch flange running entirely around each plank. The web for all the channel planks is 1 inch thick. The flanges give a definite boundary to each individual plank and in the finished house reflect the modular construction technique.

The house is one story and rectangular in plan; 38 feet by 32 feet of interior space. Three of the exterior walls are constructed entirely of these channel planks with a 18 inch to 24 inch gap between inner and outer surfaces to provide for a straw insulage infill.

Mr Dill assumed this insulation system would work so efficiently that an entire wall of glass was incorporated into the south facade. In this manner the low rays of the winter sun would be admitted for purposes of solar heat. In application the insulation and solar heating systems worked so effectively that only a regular-sized fireplace, centrally located, was needed to heat the house to a comfortable level during cloudy winter periods.

This fireplace, however, is no ordinary fireplace. Mr Dill constructed a system in which outside air is circulated thru a subterranean chamber whose temperature for all practical purposes is a constant 57 F. To provide this airconditioning system two shafts were sunk thirty feet and were connected by a tunnel 14 feet long. One shaft is located in the kitchen and is used as a refrigerant system. The other is in the living room and serves as a draft and warm air duct through the fireplace. Fresh air is induced through ducts under the floor slab into the subterranean chamber, then pushed up through the two shafts. In this manner the house is supplied with warm air in the winter and cool or unheated air in the summer. - NRHP, 1 January 2022