Compare the complete retrofit scope
A useful comparison includes the ground collector, indoor equipment, distribution changes, electrical work, controls, restoration and commissioning. Ask which existing components are being reused and on what basis. Avoid promised savings or a fixed payback period without a documented load assessment, operating assumptions and a relevant alternative system for comparison.
Coordinate the site, drilling and building requirements
Washington Ecology provides a notice process for ground-source heat pump borings. Have the project team confirm the current drilling requirements and the local site, mechanical and electrical approvals that apply. A loop design and an equipment selection do not replace those checks.
See the broader geothermal heating installation options at Everett Geothermal Heating.