G Series GTW – Dual Hydronic


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GeoStar_Aston-DualSpeed-Hydronic-Unit_tcm131-879211Aston Dual Hydronic products are engineered for the high-volume water demands of larger luxury homes. Two high efficiency, single speed scroll compressors provide water for pool/spa heating, radiant floor, snow melt, aquaculture and process water installations. An advanced MUI controller comes with each unit to monitor operation. Brazed plate heat exchangers allow efficiency in a compact unit. As always, all Aston Series units use R-410A refrigerant.




  • Cabinet

    The Aston Hydronic XL unit cabinet is fabricated from heavy gauge steel and a durable metallic finish for long lasting beauty and protection. Large lift out panels provide access from all four sides and controls that can be placed on either end (allowing piping to be located on the front or at the back) improve serviceability

  • Soft Start

    IntelliStartâ„¢ reduces the amount of current needed to activate the unit by 70%. This helps alleviate light flicker, reduces start-up noise and increases compressor life. For those with self-sufficient homes, IntelliStart allows GeoStar units to run off-the-grid.

  • Compressor

    Two high efficiency scroll compressors keep operating costs low and will provide years of reliable operation. Sound attenuating compressor blankets and double isolation mounting plates are used in every unit for “whisper-quiet” operation.

  • Controls

    A microprocessor controls the load pump, source pump and compressor by sampling tank temperatures within the GeoStore. A robust controller enables the user to view all modes of operation and easily adjust temperatures. All fault conditions are monitored by the controller to ensure safe, reliable operation. Although sophisticated in its operation of the unit, the control is easy to adjust using a single mode button, up/down arrows for temperature setting, and an LCD screen which displays current temperature and settings.

  • Brazed Plate Heat Exchanger

    Brazed plate heat exchangers provide increased efficiency, performance, and reliability. Because they’re much smaller than traditional coaxial exchangers, they allow Aston Hydronic XL units to provide high capacity performance in a compact unit.

  • R-410A

    All GeoStar units use R-410A – an environmentally friendly, non-ozone-depleting refrigerant that enhances efficiency and savings.






Specs & Downloads

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Height 24"
Width 25.6""
Depth 33.6"
Weight 390 lbs – 420 lbs