Replacing your HVAC is one of the biggest investments you can make in your home. Because of this, many homeowners wonder if they should replace their furnace and air conditioner together, or replace only one at a time. Though replacing both systems at once isn’t always necessary, sometimes doing so can improve efficiency and offer better long-term value.
In this article, we’ll share our thoughts on replacing your furnace and AC at the same time, to help you make the best possible decision for you and your household
Your Furnace and AC Work Together
Though your furnace heats your home and your air conditioner cools it, both systems work together as one HVAC system. They share several important components, including:
- Blower motor
- Air handler
- Thermostat
- Ductwork
- Air filtration system
Because these components work in unison, replacing one piece can sometimes cause issues with incompatibility or inefficiency. Installing matched equipment can help ensure both systems perform as intended.
When Replacing Both Makes Sense
In some situations, replacing both your furnace and air conditioner at the same time is the better investment.
Both Systems Are Aging
If both your furnace and AC system are almost at the end of their expected lifespan, replacing both of them makes more sense than replacing each separately over a short period of time. Older systems are also often less efficient than modern models, so a replacement can reduce long-term operating costs.
It’s More Cost-Effective to Do It All at Once
Replacing both systems at one time often reduces labor costs compared to scheduling two separate appointments. It also minimizes future disruptions and ensures both systems start their service life at the same time.
You’re in the Home for the Long Haul
If you plan to stay in your home for many years, replacing both systems can offer better long-term value. Over time, you’ll benefit from improved efficiency and fewer unexpected repairs since your heating and cooling equipment were installed at the same time.
One System Has Needed Repeated Repairs
Sometimes, one unit will fail multiple times while the other is showing signs of decline. If you’re already investing in frequent service calls, replacing both systems at once can help reduce future repair costs.
When You Can Get Away With Replacing Just One
You don’t always need to replace both systems at once. You may only need to replace one unit if:
- Your furnace is relatively new and your air conditioner fails.
- Your air conditioner is newer while your furnace has reached the end of its lifespan.
- One system is still covered under warranty and operating efficiently.
- A qualified HVAC technician determines the remaining system is compatible with a new installation.
A professional inspection can help determine if replacing a single unit is the most practical option in your circumstances.
What Affects the Price of an HVAC Replacement?
The cost of replacing both your AC and furnace depends on several factors. In addition to your home’s existing HVAC setup, you’ll also need to consider:
- Equipment size (BTU capacity and tonnage)
- SEER2 and AFUE efficiency ratings
- Existing ductwork condition
- Labor and installation complexity
- Electrical or gas line upgrades
- Local permitting requirements
The contractor performing the installation can also impact the cost. Choosing a qualified contractor will help ensure your equipment is properly sized and installed, helping you avoid unnecessary repair or reinstallation costs later.
Energy Efficiency Ratings, Explained
When comparing new HVAC systems, efficiency ratings can help you estimate long-term operating costs.
What Is SEER2 and Why Does It Matter?
SEER2 (Seasonal Energy Efficiency Ratio 2) measures how efficiently an air conditioner cools your home over an entire cooling season. It’s the updated measurement system to SEER.
Higher SEER2 ratings indicate lower energy consumption for the same amount of cooling. While high-efficiency units cost more upfront, they can reduce energy costs over time by using less energy overall.
What Is AFUE and Why Does It Matter?
AFUE (Annual Fuel Utilization Efficiency) measures how well your furnace converts fuel into usable heat. For example, a furnace with a 95% AFUE rating converts approximately 95% of its fuel into heat, with the remaining energy lost through the heating process. Higher AFUE ratings result in lower fuel usage during the heating season.
Why Both Ratings Need to Work Together
Choosing an efficient air conditioner without considering furnace efficiency, or vice versa, can limit the overall performance of your HVAC system.
Since these systems work together, opting for matching equipment with strong SEER2 and AFUE ratings can maximize comfort and efficiency, ultimately reducing operating costs throughout the year.
What to Consider Before You Replace
Before deciding on a full replacement, you should consider whether your current equipment simply needs maintenance or repair. A professional cleaning, tune-up, or minor upgrade may restore performance if your equipment is in otherwise good condition.
Routine maintenance on your furnace and AC can help address issues before replacement becomes necessary. A qualified HVAC technician can perform these services and help you determine if and when a full replacement is needed.
How Agway® Can Help You Save on Furnace and AC Repair
Replacing your HVAC system is just one part of managing long-term home energy costs. Choosing the right energy supplier and having protection for the equipment you rely on every day can provide added peace of mind.
As an Energy Service Company, Agway Energy Services® provides electricity and natural gas to homes and small businesses throughout New York and Pennsylvania. Customers are also enrolled in Agway EnergyGuard®, which helps cover repairs caused by wear and tear of qualifying heating, cooling, and electrical systems*.
Whether you’re maintaining your current HVAC system or investing in new equipment, EnergyGuard can help protect the systems that keep your home comfortable year-round. Contact Agway to learn more about our available energy plans and EnergyGuard protection.
H2: Frequently Asked Questions
Is it cheaper to replace a furnace and AC together?
Yes, replacing your furnace and AC together is often cheaper than replacing one at a time. Replacing both systems during one installation can reduce labor costs and ensure the equipment is properly matched for maximum efficiency.
How do I know if I need to replace both or just one?
Whether you need to replace both your AC and furnace or just one depends on the age, condition, warranty status, and compatibility of your current equipment. A qualified HVAC professional can inspect both systems and recommend whether replacement or repair makes the most sense.
Do I need to replace my ductwork at the same time?
No, you don’t necessarily need to replace your ductwork at the same time as your HVAC system. If your ductwork is in good condition and properly sealed, it may not need replacement. However, damaged or leaky ducts can reduce the efficiency of a brand-new HVAC system and may need to be replaced during installation.
What’s the best time of year to replace a furnace and AC?
Spring and fall are often the best times of year to replace a furnace and AC. HVAC companies tend to have greater availability before peak heating and cooling seasons begin. Planning ahead also offers more time to compare equipment options.
How long does a combined furnace and AC installation take?
Most residential combined furnace and AC installations can be completed within 1-3 days. However, the actual length of time depends on the complexity of the project and whether ductwork or other upgrades are needed.
Can my energy provider help me save money on a new HVAC system?
Though energy suppliers don’t usually install HVAC equipment, choosing the right energy plan can help you better manage ongoing heating and cooling costs. Agway customers also benefit from EnergyGuard, which helps protect qualifying HVAC systems against eligible repairs caused by wear and tear. Reach out today to learn more about EnergyGuard.
*Coverage depends on commodity purchased.
