Island Energy Inc., operating as Coastal Energy, provides heating, geothermal, and energy services across Hancock, Knox, and Waldo counties in Maine, with offices in Ellsworth, Bucksport, and Northeast Harbor. Founded in 1987, the locally owned contractor installs and services geothermal systems as a Water Furnace partner, alongside boilers, furnaces, heat pumps, and fuel delivery for heating oil, biodiesel, propane, and kerosene. Their team also holds InterNACHI certification for home inspections with mold and radon testing. The Ellsworth headquarters at 9 Industrial Road serves as the primary operations base for Hancock County and surrounding communities. Additional capabilities include plumbing, electrical contracting (wiring, generators, fire alarms), and AeroBarrier envelope sealing for commercial and residential energy efficiency. The multi-trade model lets residential and commercial clients address energy, comfort, and inspection needs through a single regional contractor across coastal Maine.
Verified active operator per https://www.coastal-energy.com/ + HVAC page Water Furnace partnership (Bundle 3 audit 2026-05-28)
Multi-location geothermal and HVAC contractor operating in Ellsworth, Bucksport, and Northeast Harbor with integrated electrical, plumbing, fuel delivery, and generator services.
