Heating
Heating in Below-Zero Temperature
Heating in below freezing temperatures can strain your HVAC system—learn expert tips to improve efficiency, retain heat, and stay warm all winter.
February 3, 2026
With 24/7 HVAC technician services available in Madison, WI, Harker Heating and Cooling is ready to install, maintain and repair your home’s heating and cooling systems.
Harker Heating & Cooling Inc. has provided high-quality heating and cooling services to residents of Dane County since 1949. Our dedicated staff of HVAC specialists is available to handle any emergency, installation or repair 24/7, 365 days a year. Count on Harker to get the job done right.
We believe everybody should feel comfortable in their home. In Wisconsin where the weather can swing from one extreme to another, you want to be able to rely on your HVAC systems to function at optimal levels. When it comes to repairing or replacing your furnace, air conditioner, fireplace, or water heater, you can rest assured that Harker’s team of HVAC contractors will provide an honest assessment of the problem, and provide you with the most affordable solution.
That’s why we make it fast and easy to request an in-home estimate. Once you request a service, our team will arrive ready to perform repairs or replacements on-time and on-schedule. Don’t waste your time with dodgy HVAC contractors. Trust our reliable, efficient HVAC experts to get the job done.
Heating in below freezing temperatures can strain your HVAC system—learn expert tips to improve efficiency, retain heat, and stay warm all winter.
Get the most out of your summer getaway with expert Lake House Climate Control tips. Learn how to maintain your HVAC system, improve indoor air quality, and boost energy efficiency for a comfortable, worry-free vacation.
Maintaining your HVAC system is essential to ensuring its efficiency, extending its lifespan, and preventing costly repairs. For homeowners in Wisconsin, where the weather can swing from frigid winters to hot, humid summers, HVAC system maintenance is vital for year-round comfort.
