Geothermal.contractors

Kalins Indoor Comfort is a three-generation family-owned HVAC company founded in 1921 and headquartered in Sioux City, Iowa. With over 100 years in the trades, Kalins installs and services both open-loop and closed-loop geothermal ground-source heat pump systems across a tri-state territory covering Iowa, South Dakota, and Nebraska. The company holds Lennox Premier Dealer status of more than 70 years and is a five-time Lennox Circle of Excellence award recipient (2009, 2020, 2021, 2022, 2023), an award given to fewer than 50 dealers across North America. South Dakota branch locations in Vermillion and Yankton extend coverage into southeastern South Dakota, with 24/7 emergency HVAC service throughout the territory. Verified active operator per https://www.kalinsindoor.com/geothermal-service/ and https://www.kalinsindoor.com/about/credentials/ (factcheck 2026-05-26, Opus re-audit 2026-05-27)