Project Title: Holbrook Unified School District K-12
Project Designation: Education Projects
Owner: Holbrook Unified School District
General Contractor: Holbrook Unified School District
Architect: Intellichoice Energy
Engineer: Intellichoice Energy
Project Description: Midstate Mechanical was selected for upgrading the HVAC equipment at three schools in the Holbrook School District. There were roof top gas heaters and evaporative coolers for the classrooms, and the District wanted to upgrade to mechanical cooling and new heating systems. Because of the low power consumption on the heater and evaporative cooling combination, the upgrade to mechanical cooling was a challenge to the electrical systems of the buildings involved as the mechanical cooling systems would involve much higher power consumption.
Midstate chose to install the Nextaire / Diakin system that is provided by Intellichoice. This system is a variable refrigerant system that uses a condenser section, the Nextaire part of the system, which is driven by an automotive engine that burns natural gas. This 15 ton condenser will run consuming approximately 10 amps of power compared to 70 – 80 for a standard electric compressor system. This condenser is paired with Diakin indoor air handling equipment. The Diakin units come in many different configurations, and the cassette type is the most energy efficient as it uses a DC voltage motor. This allows for speed control and lower amp consumption. Midstate installed this system at 3 school sites; Park Elementary 18 classrooms – 18 air handlers and three 15 ton condensers, Junior High Bldg A 11 classrooms – 11 air handlers and two 15 ton condensers, and High School Bldg S 4 classrooms – four air handlers and one 8 ton condenser.