Water is a major theme at this Lattingtown home listed for $1.99 million. Not only does the property boast a view of Long Island Sound, but groundwater keeps the heating bills down in the winter.

Homeowner John Gallo had a geothermal heat system installed eight years ago. Pumped up from underground, the flow keeps a consistent temperature.

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Another pump feeds the property’s sprinklers instead of using municipal water.

Inside, the home has four bedrooms and 3 1⁄2 bathrooms. It is listed with Barbara Brundige of Douglas Elliman Real Estate.