37 Home energy assessment services for the purpose of determining home improvements needed to improve energy use and efficiency; Installation, maintenance, upgrading and repair of heating equipment, HVAC equipment, air conditioners, hot water heaters, domestic water heaters, ovens, clothes washers and dryers, smart thermostats, appliances, lighting, insulation, air sealing and duct sealing, and natural gas lines; Home energy assessment services for the purpose of determining in-home energy efficiency; Providing a website featuring information on in-home energy efficiency and energy efficient products including smart thermostats, smart home equipment, and home lighting, water saving measures, and home weatherization; Building operations including heating and cooling system tune-up and building tune-up, retro-commissioning, monitoring based commissioning, virtual commissioning and strategic energy management; Audit, engineering, installation, maintenance, upgrading and repair of lighting, heating equipment, air conditioners, hot water heaters, food service equipment, agricultural equipment, building shell, motors and drives, plug load, refrigeration, industrial equipment, additional appliances and smart thermostats; Providing hybrid heating solutions for residential customers; Providing District Geothermal Heating systems for residential, commercial and industrial applications