GeoStar: Residential Geothermal Heat PumpsCombining a variable-capacity compressor with a variable-speed blower motor and a variable-speed loop pump, the Sycamore Series geothermal heat pumps provide energy-efficient comfort while protecting the environment, said the company. The use of variable technology allows the unit to scale output to exactly the level needed. Available in 3- to 5-ton capacities, the series achieves an EER of 41 and a 5.3 coefficient of performance (COP). The Sycamore’s variable-capacity compressor offers soft-start capabilities that eliminate light flicker and gently ramps up to speed for quiet operation. The new Aurora control board offers true two-way communication between components, intelligent operating logic, and powerful troubleshooting capabilities. The unit controls and monitors system conditions and can determine when excess heat is available to route to the water heater. This option enables the Sycamore to generate supplemental hot water from energy that would otherwise be wasted. According to the manufacturer, the corrosion-resistant air coil increases equipment life, while the coil’s large size improves efficiency and provides better dehumidification during cooling. The system is fully insulated for quiet operation with cleanable foil-backed insulation.


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