Replacing your home’s HVAC system—both your furnace and air conditioner—is one of the most significant upgrades a homeowner can make. Whether your current system is aging, inefficient, or simply no longer keeping up with modern comfort expectations, a furnace and air conditioning replacement offers a unique opportunity to improve energy efficiency, indoor air quality, and long-term home comfort.
In this guide, we’ll cover everything you need to know about new HVAC installation, replacing HVAC systems, and how to navigate pricing, quotes, and installation steps. By the end, you’ll understand what it takes to successfully replace your heating and cooling equipment, and how to get the best deal on furnace and AC for your home.
Why Replace Both Furnace and AC at the Same Time?
Many homeowners wonder if it’s necessary to replace their furnace and air conditioner simultaneously. There are several compelling reasons to consider a combined approach:
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Compatibility – Modern AC units and furnaces are designed to work together. Mixing old and new units can reduce efficiency.
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Efficiency – Upgrading both systems often results in higher overall SEER (Seasonal Energy Efficiency Ratio) and AFUE (Annual Fuel Utilization Efficiency) ratings, lowering energy bills.
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Warranty and Longevity – Installing a new furnace with a new AC ensures warranties are aligned and reduces future maintenance conflicts.
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Cost Savings – Combining installation saves on labor, permits, and materials compared to two separate replacements.
Pairing a high-efficiency furnace with a matched AC unit can reduce your annual energy costs while improving home comfort and reducing indoor humidity levels.
Understanding Your Current System
Before shopping for furnace and air conditioner replacement, it’s important to understand what you currently have:
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Furnace Type: Gas, electric, or oil
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AC Type: Split system, packaged system, or ductless
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Age of Units: Most HVAC equipment lasts 12–20 years
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Efficiency Ratings: Older systems are usually far less efficient than modern counterparts
Your existing ductwork may also impact your replacement options. If ducts are outdated or leaking, installing a new furnace and air conditioner may require duct modification to achieve optimal airflow and efficiency.
Choosing the Right Replacement HVAC System
Selecting the right system involves balancing comfort, efficiency, and cost. Popular options include:
1. Matched Bundles
Bundles like the Goodman 3 Ton 14.5 SEER2 R32 Bundle provide both the furnace and AC components pre-selected for compatibility, making installation smoother and guaranteeing performance efficiency.
Advantages:
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Fully matched components
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Designed for standard residential applications
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R32 refrigerant for reduced environmental impact
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High SEER rating for cooling efficiency
2. Separate Components
Some homeowners choose to replace only one component at a time, or mix brands. While this can work in certain situations, efficiency may be compromised, and warranty terms can become complicated.
Steps for Furnace and AC Replacement
Replacing your furnace and AC system involves several critical steps:
Step 1: Evaluate Your Home’s Heating and Cooling Load
A proper Manual J load calculation ensures your new system is correctly sized. Oversized systems short-cycle and waste energy; undersized systems run continuously and fail to cool or heat adequately.
Step 2: Remove Old Equipment
Removal requires:
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Disconnecting electrical power
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Properly venting and disposing of refrigerant from the AC
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Removing the old furnace carefully
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Inspecting ducts for leaks or damage
Step 3: Prepare Installation Site
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Level and secure concrete pad for the condenser
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Ensure proper clearance around outdoor unit
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Check airflow paths and venting
Step 4: Install Furnace and Air Handler
The indoor unit must be positioned to:
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Connect securely to ductwork
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Align with return and supply plenum
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Provide access for filter replacement and maintenance
Step 5: Install the Condenser and Refrigerant Lines
The outdoor AC unit is placed on a level pad, connected to the indoor coil via copper refrigerant lines, and secured according to local building codes.
Note: Refrigerant handling requires certified HVAC technicians to comply with federal EPA regulations.
Step 6: Electrical Connections and Thermostat Setup
The furnace and AC must be wired to the breaker panel and thermostat. Modern smart thermostats can further optimize energy use.
Step 7: System Startup and Testing
This involves:
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Checking airflow and temperature differentials
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Testing refrigerant pressure
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Ensuring safety switches and blower operation
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Confirming system efficiency matches manufacturer ratings
Understanding Furnace and AC Replacement Costs
Costs vary depending on unit size, efficiency, and installation complexity. Typical price ranges include:
| Component | Average Cost (Installed) |
|---|---|
| New Furnace | $3,000 – $6,000 |
| New AC Unit | $3,000 – $5,500 |
| Full Furnace & AC Bundle | $6,500 – $10,000 |
| High-Efficiency Units | $10,000+ |
Other factors affecting costs:
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Duct modifications
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Electrical upgrades
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Permitting fees
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Labor variations by region
Angi provides real-time cost estimates and quotes for HVAC replacements, helping homeowners budget effectively for a furnace and air conditioner replacement.
Comparing Furnace and AC Replacement Options
Here are some options to consider:
1. Gas Furnace with Split AC System
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Common in residential homes
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Offers high-efficiency heating with natural gas
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Paired with high SEER AC for cooling
2. Packaged HVAC Units
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Both heating and cooling in one outdoor unit
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Useful for homes without basements or indoor utility space
3. Heat Pumps
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Provide both heating and cooling
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Highly efficient in moderate climates
Common Questions Homeowners Ask About Furnace and AC Replacement
Q: How long does a full furnace and AC replacement take?
A: Professional installation usually takes 1–2 days, depending on complexity and ductwork modifications.
Q: Can I replace just my furnace or AC?
A: Yes, but pairing old and new systems may reduce efficiency and impact warranty coverage.
**Q: How do I get an accurate air conditioner quote?
A: Request multiple quotes from licensed HVAC contractors and compare bundled system pricing. Many sites, like HomeAdvisor, offer instant AC and furnace quotes based on your ZIP code and home size.
Q: What is the cost of a 4 ton AC unit with gas furnace?
A: Prices typically range from $7,000 – $12,000 installed, depending on efficiency, location, and installation complexity.
Tips for Affordable HVAC Replacement
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Shop Bundled Systems – Like the Goodman bundle, which includes both furnace and AC for matched performance.
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Schedule During Off-Season – HVAC contractors may offer discounts during spring or fall.
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Check Utility Rebates – Many utility companies provide rebates for high-efficiency HVAC installations (Energy Star rebates).
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Maintain Existing Ducts – Sealing and insulating ducts can save money instead of full replacement.
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Compare Multiple Quotes – Use online tools to evaluate local contractors for cost, warranty, and experience.
Maintenance After Furnace and AC Replacement
To ensure long-term efficiency and longevity:
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Replace filters regularly
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Schedule annual maintenance checks
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Clean outdoor condenser units
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Monitor thermostat settings for consistent comfort
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Check for unusual noises or leaks
Proper maintenance can prevent emergency repairs and extend the life of your new HVAC system.
Why Choose Modern Furnace and AC Units?
New systems offer:
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Energy efficiency – Reduced monthly utility bills
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Quiet operation – Modern units are significantly quieter
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Environmental responsibility – New refrigerants have lower global warming potential
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Smart control options – Wi-Fi thermostats for scheduling and remote control
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Warranty protection – Manufacturer-backed for peace of mind
The Goodman 3 Ton 14.5 SEER2 R32 bundle is a great example of a modern system designed for long-lasting comfort and energy efficiency.
Getting Multiple HVAC Quotes
Before committing, homeowners should obtain multiple quotes for furnace and AC unit replacement. Online resources can help:
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Energy Star – Efficiency and rebate guidance
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Energy.gov – Cost-saving strategies and federal standards
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Angi – Contractor quotes and price comparisons
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HVAC learning resources – Education about installation and maintenance
Final Thoughts
Replacing your furnace and air conditioner is a significant investment, but it’s also one that brings long-term comfort, energy savings, and peace of mind. By understanding your home’s needs, reviewing furnace and AC replacement costs, choosing the right equipment, and planning proper installation, you can ensure a smooth upgrade.
Bundled systems like the Goodman 3 Ton 14.5 SEER2 R32 bundle simplify the process, guaranteeing compatibility and efficiency. With careful planning, proper installation, and routine maintenance, your new HVAC system will deliver comfort and reliability for years to come.
