All Season Heating & Air Conditioning is a family-owned HVAC and geothermal contractor serving Helena and Shelby, Montana since 1984, operated by owner Peder Underdal. As a Premier Lennox Dealer (Contractor Registration #150921), the company specializes in GeoComfort geothermal heating and cooling systems for residential and commercial properties throughout the Hi-Line area. Their fully insured technicians install horizontal, vertical, and pond loop geothermal systems engineered to deliver significant energy savings on monthly utility bills. All Season offers geothermal system sales, installation, and maintenance programs alongside standard HVAC services including air quality solutions, humidification, WiFi thermostats, and duct cleaning. The company provides 24/7 emergency support and free in-home estimates. Backed by a 4.9-star Google rating from over 770 reviews and four decades of regional expertise, All Season combines GeoComfort manufacturing quality with comprehensive service from installation through ongoing maintenance.
Verified active operator per https://allseasonheating-air.com/ + https://allseasonheating-air.com/about/ (Bundle 5 audit 2026-05-29)
Premier Lennox Dealer offering horizontal, vertical, and pond loop geothermal systems engineered for 300% efficiency and 30-70% energy savings, serving Helena and the Hi-Line area since 1984.
