Rader Engineering

Rader Engineering provided mechanical engineering services for this high-end custom home in High Aspen Ranch. The project consisted of two phases (two buildings) that were connected by a connector bridge. The home is heated and cooled by a ground source heat pump (GSHP) system connected to 40 vertical boreholes, each 250’ deep. In total, there are four 10 ton water-to-water GSHPs in the project, totaling 40 tons. Special attention was paid to properly attenuating sound generated by the mechanical systems, as this was a high priority for the Owners. Sound mitigating strategies include vibration isolators for fans, piping and ductwork as well as Variable Frequency Drives

(VFDs) for optimal fan coil control. The home is equipped with a sophisticated DDC control system. Multiple air-to-air heat exchangers are utilized to provide efficient and balanced fresh air exchange in the home. Both phases include a whole house exhaust fan used for general ventilation and for free nighttime cooling. Special exhaust and ventilation systems were designed for the woodworking shop, fabrication and finishing rooms. All of the garages are provided with exhaust ventilation for improved indoor air quality and health. Domestic hot water is generated by GSHP preheat ing as well as by high efficiency gas-fired condensing boilers.