Replacing both a furnace and an air conditioner together typically costs between $ ๐ , ๐๐๐ and $ ๐๐ , ๐๐๐ (installed), with a national average of about $ ๐๐ , ๐๐๐. Costs vary significantly based on home size, unit efficiency, and your local climate in Kansas.
Yes, it is cheaper to replace your furnace and AC together. Bundling the two installations into a single job saves an estimated $2,000 to $5,000. It also improves long-term system performance and reduces utility bills.
The $5,000 rule is a guideline to help homeowners decide whether to repair or replace their HVAC system. You multiply the age of your unit by the cost of the needed repair. If that number exceeds $5,000, replacing your HVAC system is often more cost-effective.
For a typical 2,000 square foot home, the cost to install a new HVAC systemโincluding both air conditioning and heatingโranges from $7,000 to $12,000. This estimate includes equipment, installation, and labor.
Yes, you should strongly consider replacing a 25-year-old furnace. While it has outlived the typical 15 to 20-year lifespan, at this age, parts fail frequently, efficiency drops dramatically, and there is an increased risk of carbon monoxide leaks.
Yes HVAC prices have steadily increased over the past few years, and 2026 is no exception. These increases are affecting everything from entry-level systems to high-efficiency units, making it more expensive than ever to install or replace HVAC systems.
5 Warning Signs It's Time for Furnace Replacement
A standard residential furnace lasts 15 to 20 years. However, the exact lifespan varies based on the type of system and how well it is maintained.
The Short Answer Is: Yes! Lowering a thermostat by one degree can save you money on your heating or cooling bills. The exact savings depend on factors like climate, insulation, and the efficiency of your HVAC system, but it's estimated to reduce energy costs by around 1-3% per degree for each 8-hour period.
The top three air conditioning brands for reliability and premium performance in the US are Carrier, Trane, and Lennox.
The best time to buy a furnace is during the off-season, specifically late spring (April-May) or early autumn (September-October), when HVAC companies are less busy and offer lower prices, rebates, or promotions. Purchasing in these shoulder seasons ensures faster installation times and better negotiating power compared to winter peak season.
Furnace Tax Credit Amounts and Limits for 2025
Federal HVAC tax credits allow homeowners to claim a maximum annual credit of up to $3,200 for qualifying HVAC upgrades made between 2023 and 2025.
The heat exchanger is often considered the most costly part of a furnace to repair or replace. It is a critical component that transfers heat from the combustion process to the air that circulates throughout your home. Over time, heat exchangers can crack due to the constant heating and cooling cycles they undergo.
Best Time to Buy an AC Based on Your Purpose
You certainly can replace the furnace if you're worried about its operational integrity, but most systems under 12 years old have a few more seasons left in them. More often than not, you can keep an old-ish furnace when you get your new air conditioner.
Many Amish homes are built with plenty of windows to help circulate the air and bring in the cooler overnight temperatures. They open the windows on the top floors to help the heat escape while the family retreats to the lower grounds within their homes for comfort.
Does Turning Air Conditioning on and off Versus Leaving it on Cost More? Ultimately, yes, it is more expensive to turn your air conditioning on and off throughout the day. This is because your AC will be experiencing additional wear and tear, along with working harder to restore optimal levels.
How cool should my house be if it's 100 outside? Your AC can typically cool about 20ยฐF below the outdoor temperature, so if it's 100ยฐF outside, maintaining 78โ80ยฐF indoors is reasonable.
The "20-degree rule" is an HVAC standard stating that an air conditioner can generally only cool a home by about 20โF20 raised to the composed with power F20โF compared to the outside air. If it's 95โF95 raised to the composed with power F95โF outside, the lowest your AC can typically maintain inside is around 75โF75 raised to the composed with power F75โF. Setting the thermostat lower wastes energy without cooling the space.
You should probably Replace if: [ ] The repair costs more than 50% of a new unit. [ ] The furnace is over 15 years old. [ ] You have had to repair it more than once in the last 2 years.
Type of Furnace
Some types of furnaces are more durable than others. For example, oil furnaces are built to last longer but may require more frequent maintenance. Gas and electric models, while easier to maintain, may have shorter lifespans.
Average Cost to Replace a Furnace
However, the cost of furnaces can range widely depending on their size, type, and efficiency, and homeowners can generally expect a new furnace to cost anywhere between $3,800 and $10,000. If efficiency is important to you, high-efficiency models can reach up to $12,000.
Most furnace issues stem from a few common culprits. The easiest to check yourself are clogged air filters and thermostat errors, which usually cause the system to blow cold air, run inefficiently, or cycle on and off constantly. Other frequent problems include dirty flame sensors or failing blower motors.
No, a standard gas furnace will not work without electricity. Even though they use natural gas or propane for heat, they rely entirely on electricity to power the ignition, safety sensors, control board, and blower motor.
If you notice your system running louder than normal or develops rattles, buzzes or hums, it's time to replace due to cracks, leaks or other structural issues. Going back to the last point, if you've noticed signs of rust or cracks developing in or around your furnace, it's time to replace.