Interstate Heating: Sussex, Wisconsin's Trusted HVAC Partner

For homeowners and business owners across Southeastern Wisconsin, a reliable heating and cooling system is a year-round need. Interstate Heating in Sussex, WI, has been the local answer since 1962. This family-founded company provides complete HVAC solutions, from urgent repairs to planned installations, backed by a promise of 100% customer satisfaction.

Business Overview

Interstate Heating serves residential, commercial, and industrial clients. Their team of experienced technicians is equipped to handle both routine maintenance and emergency service calls, understanding that a broken furnace in a Wisconsin winter or a failed AC unit during a humid Milwaukee summer can't wait. They focus on providing systems and service that fit the specific needs of each customer, whether it's a historic home in Waukesha or a modern office building in Brookfield.

Key Services

The company offers a full range of HVAC services to keep properties comfortable in all seasons:

  • HVAC Installation & Replacement: Expertly installing new furnaces, air conditioners, and complete systems for better efficiency and comfort.
  • HVAC System Repair: Fast, accurate diagnostics and repairs to restore heating or cooling quickly.
  • HVAC System Maintenance: Regular tune-ups and check-ups that help prevent breakdowns and extend system life.
  • Ductwork Services & Boiler Work: Comprehensive care for all parts of your heating and air distribution system.

Areas Served

Interstate Heating proudly serves a wide area around Sussex, WI. This includes Milwaukee, Waukesha, New Berlin, Brookfield, Menomonee Falls, Germantown, Pewaukee, Richfield, Lisbon, Hartland, Genesee, Ottawa, Erin, Addison, Concord, and Hubbard. Their long history in the region means they understand the common HVAC challenges in local architecture, from older Milwaukee-area homes to newer suburban builds.

Company History

The company's story began in 1962 when original owners Gordy Terry and John Cole set out with a simple mission: to offer the highest level of HVAC service. That commitment to quality and fair pricing remains the core of the business today. From its Sussex, WI base, the company has grown to become a trusted name, adapting to new technologies while holding onto its foundational values of customer care.

Leadership & Local Presence

For over 50 years, the leadership at Interstate Heating has focused on bringing the highest level of expertise to every job. Being locally owned and operated means they are invested in the community's well-being. Their technicians are familiar faces in the neighborhoods they serve, providing not just a service, but a reliable local resource for HVAC needs.

Specialties & Highlights

Several key features set Interstate Heating apart:

  • Carrier Factory Authorized Dealer: This partnership provides access to high-quality, efficient heating and cooling equipment.
  • Preventive Maintenance Agreements: Planned service programs help maintain system efficiency, lower energy bills, and prevent costly surprises.
  • Free Estimates: Transparent, no-obligation quotes for new installations or major replacements.
  • 100% Satisfaction Guarantee: A straightforward promise that stands behind their workmanship and service.

Why Locals Choose Interstate Heating

Residents and business owners in Sussex, WI, and the surrounding communities return to Interstate Heating for consistent reliability. It’s the combination of deep local experience, a straightforward customer guarantee, and a practical approach to HVAC solutions. They don’t just fix systems; they provide long-term comfort and peace of mind, making them a staple for Wisconsin homes and businesses through every season.

Contact Information

Interstate Heating

★★★☆☆ 2.6 / 5 (5)

: N53 W24950 S Corporate Cir, Sussex, WI 53089

: (262) 246-4772

: http://www.interstateheating.com

Business Services

  • HVAC installation or replacement
  • HVAC system repair
  • HVAC system maintenance

Business Location & Hours



Mon:7:00 AM - 4:30 PM
Tue:7:00 AM - 4:30 PM
Wed:7:00 AM - 4:30 PM
Thu:7:00 AM - 4:30 PM
Fri:7:00 AM - 4:30 PM
Sat:Closed
Sun:Closed




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