A common practice in many older commercial and large-scale facilities is to perform a scheduled retro-commissioning survey of equipment to ensure this equipment is meeting its intended design and functionality. After a detailed facility investigation, IES experts work with the customer on choosing equipment that would most benefit from either repair or retrofit. These benefits may include increased occupant comfort, greater controls flexibility, decline in O&M expenses, energy savings and/or utility rebates. IES has performed these surveys in office spaces and large medical facilities across the country. Additionally, IES has performed commissioning on newly installed solar PV, solar thermal and geothermal systems in healthcare environments.