Interstate Heating Co IncHVAC Services in Sussex

Interstate Heating Co Inc specializes in Carrier HVAC installation, repair, and maintenance. Proudly serving Sussex and the surrounding areas, we deliver reliable, certified HVAC solutions to meet your home's needs. As your local Carrier Factory Authorized Dealer, your satisfaction is our number one priority. That's why we stand behind our work with a 100% satisfaction guarantee. Equipped with NATE-certified technicians, we strive to exceed your expectations, whether performing routine maintenance or installing a new Carrier heating and cooling system.

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(262) 372-1532

N53W24950 S Corporate Cir

Sussex WI 53089

764 Google Reviews

Experience and Certifications

Factory Authorized Dealer
As a Carrier Factory Authorized Dealer, we have met Carrier's highest standards for superior skills, service, and we proudly offer a 100% satisfaction guaranteed.
NATE Dealer
North American Technician Excellence (NATE) is the leading certification program for HVAC technicians and is the only test supported by the entire industry. We are proud to employ NATE certified technicians.
Distinguished Dealer
The Distinguished Dealer Award is an annual award given to a select group of Carrier Factory Authorized Dealers who achieve high scores on a set of criteria established each year by the Carrier brand. It spotlights our company as an exceptional Carrier dealer whose products and services consistently meet high levels of excellence.
Financing Available
We offer flexible financing options for your new Carrier product or system. With approved credit, you can enjoy convenient monthly payments, competitive interest rates, and online bill pay.
Cool Cash
We participate in Carrier Cool Cash rebates. With the support of Carrier, during select times of the year Cool Cash rebates might be available when you purchase a qualified Carrier heating and cooling system.
Geothermal Installations
We are proud to install Carrier geothermal heat pumps, which harness earth's natural energy and consistent underground heat instead of relying on outside air like traditional heat pumps.

HVAC Repair and Installation Services

Air Conditioner Repair & Service
We specialize in fast, reliable air conditioner repair and service to keep your home cool and comfortable. Whether it’s a minor fix or a major repair, we're here to ensure your AC runs smoothly when you need it most.
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Furnace Repair & Service
We provide expert furnace repair and service. Our skilled technicians are ready to quickly diagnose and resolve any issues, keeping your home warm and comfortable year-round.
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HVAC System Installation
We provide expert HVAC installation to keep your home comfortable year-round. Whether you're replacing your current system or installing HVAC for the first time, we'll help you choose the right solution for your needs and handle the installation with precision and care.
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HVAC Maintenance
We offer annual HVAC maintenance to keep your system running efficiently and help prevent unexpected breakdowns. Through a thorough inspection and tune-up, we ensure your heating and cooling system is ready to keep you comfortable all year long.
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