Egg Systems

Egg Systems, established in 1991, have designed and completed around 1900 HVAC systems in Florida. Jay Egg who is the founder is currently engaged in lending his expertise on projects ranging from 5 tons to 6000 tons to industry manufacturers and professional organizations while spreading information on geothermal systems in sites such as Green Builder and Mechanical Hub

 Project Overview

Sussex EOC is a 18,000-square foot facility with $4 million worth of electronics equipment to process 911 calls. The EOC already had Bosch/FHP closed loop system with 24 wells, each of 600 ft. depth to serve its heavy cooling needs for all the equipment. The heat-sensitive equipment were jeopardized as the geothermal system started discharging excess heat into the center because of a phenomenon in the Earth called ‘thermal retention’. Since the installation of a temporary cooling tower in 2011 to ease thermal retention cost the center $ 50 per day, the managers opted for a pump to injection thermal exchange well system.

  Project Goals

  • Low equipment replacement cost
  • Needs +1 construction
  • Reduction of water consumption
  • Loop-field capacity Increase
  • Longevity of HVAC system
  • Energy savings and environmental comfort
  • Elimination/reduction of combustion/electric resistance heating


The following equipments were used for the project:

  • 13 Bosch/FHP models from 0.5 to 24 tons capacity.
  • Four 8″ cased water wells drilled to a depth of 400 ft each.
    • Two for redundant supply water pumping
    • Two for reinjecting water discharged from plate and frame exchanger
  • Three-way valves in geothermal circuit to allow for varying combinations of operation modes such as pump to reinjection, closed loop and back up cooling tower.

  Project Benefits

  •  No outdoor equipment
  •  Hurricane proof (HVAC equipment wise)
  •  Continued HVAC system longevity
  •  Elimination of oil furnace and electric resistance heating
  •  Noticeably superior comfort and heating and cooling modes
  •  Remarkable system efficiency (14 to 15 EER) at standard equipment pricing

 Project Team

  • Geothermal HVAC consultant: EggGeothermal Consulting
  • Mechanical Contractor: Gipe Consulting Engineers
  • Completed by: September, 2013

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