Abstract: An air ventilation system for geothermal heating and cooling of an interior of a building, has piping that includes: an outdoor air inlet; a geothermal ground loop embedded in earth below a ground surface adjacent or below the building and having a ground supply line and a ground return line; a flow control device in the piping; a bridge line between the ground supply line and the ground return line; a building supply line connected to the ground return line and configured to distribute air throughout the interior of the building; a building return line configured to return air from the building; and an exhaust air outlet connected to exhaust air from the building return line.

Abstract: Seal housings with flange collars, floating bushings, seal compressors, floating polished rods, independent fluid injection to stacked dynamic seals, and related apparatuses and methods of use. Embodiments are described that permit the polished rod to float within a tubular shaft, and the tubular shaft to float within a stationary housing, of a seal housing, to permit the seal housing to accommodate rod deviation from center. Flange collars are provided to facilitate the interconnection between seal housings and driveheads that previously were incompatible with one another.