Heating Installation & Replacement in Wausau, WI

Wausau homes need heat for most of the year, and a system that struggles on a minus-15 night is a system that is costing you money every month. Southport replaces aging furnaces and boilers and installs heat pumps for homeowners across Marathon County, with each system sized from a load calculation and installed by NATE-certified technicians.

Call 262-898-3000 to set up a heating installation estimate in Wausau.

Reasons to Replace Your Heating System

There is rarely a perfect moment to replace a furnace or boiler, but planning ahead beats replacing one in an emergency. These are the most common reasons Wausau homeowners make the switch.

• The system cannot hold temperature on the coldest nights, even with the thermostat turned up.
• Your furnace is past 15 years old, and repair calls are becoming a yearly event.
• Propane or gas costs keep climbing, and an older 80% efficient furnace is burning more fuel than a modern 95% unit would.
• The home has changed, with an addition, finished basement, or new windows that altered the heating load.

Choosing and Installing the Right System

The process starts with a visit from one of our comfort advisors. We measure the home, look at insulation, windows, and air sealing, and run a load calculation using design temperatures that reflect central Wisconsin. Sizing off a nameplate or a rule of thumb is how homes end up with furnaces that short-cycle in October and still fall behind in January.

Fuel and equipment choices come next. Homes on natural gas often get the best value from a high-efficiency condensing furnace. For propane homes, efficiency matters even more because the fuel costs more per unit of heat, and a heat pump paired with a propane furnace can cut fuel use on milder days. Homes with radiators or in-floor heat can move to a modulating condensing boiler and keep the existing distribution. You get several options with upfront pricing, so you can weigh comfort, efficiency, and budget side by side.

We also look at what the new equipment connects to. Venting, gas lines, condensate drainage, and ductwork all affect how a new system performs. If the ducts are undersized or leaking, we will tell you before installation rather than after, because poor ductwork is one of the most common reasons a new furnace falls short of its rated efficiency.

On installation day, our crew protects your floors, removes the old system, and installs the new equipment to manufacturer specifications. Every system is started, tested, and checked for proper airflow and combustion before we leave, and you get a walkthrough of the thermostat and filter location.

Furnace Installation

We install natural gas and propane furnaces, including two-stage and modulating models that run longer at lower output for steadier temperatures.

Boiler Installation

New high-efficiency boilers replace older cast iron units, often with an indirect water heater added to the same system.

Heat Pump Installation

Cold-climate heat pumps work well in Wausau when paired with a furnace or electric backup that takes over during deep cold.

Why Choose Southport for Heating Installation in Wausau?

Southport backs new installations with a 2-Year Labor Warranty, a No-Lemon 5-Year Guarantee on furnace heat exchangers, and an In-Home Cleanliness Guarantee. Homeowners who want to spread out the cost can apply for financing through Service Finance Company, GoodLeap, or a Wells Fargo Carrier credit card, with approved credit.

Plan your next heating system before winter plans it for you. Call 262-898-3000 to schedule an estimate in Wausau.