Introduction: Let’s Get Real About Installing a 5-Ton R-32 Combo
Hey there — Mark Callahan here. Installing a 5-ton R-32 AC and gas furnace combo is one of the biggest investments most homeowners will make, so it’s natural to have questions. Every week, I talk to folks who want to know everything from “Do I need a permit?” to “Is R-32 really better?” to “How long will the whole process take?”
That’s exactly what this article is all about — answering your most common FAQs in plain English so you feel comfortable, informed, and ready to move forward. Ready? Let’s jump in.
(And if you’re looking for a top-quality combo to install, check out the R-32 AC and gas furnace 5-ton collection at The Furnace Outlet — they make choosing the right unit a breeze.)
1. What Size Home Does a 5-Ton R-32 Combo Typically Serve?
This is probably the most common question I get.
A 5-ton system is designed for larger homes — usually between 2,500 and 3,500 square feet — but that’s just a ballpark figure.
Every house is different. Factors like:
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🧱 Insulation quality
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🪟 Window type and orientation
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🌡️ Regional climate
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🧑🤝🧑 Number of occupants
can all change the capacity you need. That’s why I always recommend a Manual J load calculation before deciding on size. It looks at all those factors to make sure you’re not oversizing or undersizing.
For a deeper dive into system sizing and why it matters, check out the U.S. Department of Energy’s HVAC sizing guide.
2. What’s Special About R-32 Refrigerant?
R-32 is a refrigerant that’s rapidly becoming the new standard — and for good reason:
✅ More efficient heat transfer — so your system can do the same job using less refrigerant.
✅ Lower global warming potential (GWP) — it’s more eco-friendly than R-410A.
✅ Lower operating pressures — which can mean less wear on your system.
For an in-depth look at why R-32 is a smart choice, the folks at Daikin explain it well on their R-32 refrigerant overview page.
And don’t worry — R-32 is approved and safe when handled by a certified pro.
3. Do I Need a Permit to Install a 5-Ton R-32 AC and Furnace?
Short answer? Almost always, yes.
Your local city or county will require a permit for replacing an AC and furnace combo because:
✅ They need to make sure the work meets local codes.
✅ It protects you if you ever sell your home — unpermitted work can cause headaches with appraisals or insurance.
That’s why I always recommend going with a licensed HVAC contractor. They’ll pull the permits, schedule the required inspections, and make sure everything is up to code.
You can check what your local permitting requirements are by looking up your municipality's building department, or you can read this article on the importance of permits at the International Code Council.
4. What’s the Installation Timeline?
A straightforward 5-ton AC and furnace combo replacement usually takes:
✅ 1-2 days total — most of the work is swapping the old units and reconnecting refrigerant, gas, and electrical lines.
✅ Additional time if ductwork modifications or electrical panel upgrades are needed.
If you’re dealing with new ductwork or major electrical updates, plan for a few extra days.
And as always, I’d rather do the job right than do it fast. A rushed install can lead to poor performance and system issues down the road.
5. What Prep Work Do I Need to Do Before Installation Day?
A good HVAC company will give you a prep checklist — but here’s my quick list of things you can do:
✅ Clear a path to the furnace and AC unit.
✅ Move cars, furniture, or boxes that could block access.
✅ Trim shrubs or grass around the outdoor condenser pad.
✅ Make sure pets are secured in a safe area.
✅ Double-check that the electrical panel is accessible.
And if you want to read a more in-depth preparation checklist, Energy Star has a helpful guide you can review at energystar.gov.
6. What’s Included in a Typical Installation?
Here’s what most quality HVAC companies will do:
✅ Remove the old AC condenser and furnace.
✅ Haul the old equipment away properly.
✅ Install new R-32 refrigerant lines and gas connections.
✅ Set up the new 5-ton condenser outside and furnace inside.
✅ Charge the refrigerant properly.
✅ Test for refrigerant leaks and combustion safety.
✅ Test the thermostat and controls.
✅ Do a full startup test and show you how to use your new system.
And they should also leave your home clean — nobody wants to come home to a pile of debris!
7. Will Installing a 5-Ton R-32 Combo Save Me Money?
That depends — but usually, yes.
If you’re replacing a system that’s 10-15+ years old and maybe only 10–12 SEER, jumping up to a modern R-32 combo with SEER2 14+ and a 95% AFUE furnace can drop your utility bills by 30% or more.
And since R-32 is more efficient and environmentally friendly, you may also qualify for local utility rebates or tax credits. Be sure to check out the ENERGY STAR rebate finder to see what’s available in your area.
8. Do R-32 Systems Require Special Maintenance?
Not really — you’ll do the same routine upkeep as any other AC/furnace combo:
✅ Change or clean filters every 1–3 months.
✅ Keep outdoor condenser clear of debris.
✅ Have a pro check refrigerant charge and combustion annually.
That said, refrigerant types do matter when you call in a pro for service. Make sure your tech is certified to work with R-32 refrigerant — most HVAC companies are trained for this already.
And if you want a refresher on keeping your combo in top shape, check out my article Mark’s Maintenance Blueprint: Keeping Your 5-Ton R-32 AC & Furnace Running Strong for all my best pro tips.
9. What’s the Typical Lifespan of a 5-Ton R-32 Combo?
With proper installation and care?
✅ AC lifespan: 12–18 years
✅ Gas furnace lifespan: 15–20 years
Of course, a lot depends on your climate, how often you use the system, and how well you maintain it. A well-kept combo can easily go the distance — and you’ll save money on repair bills along the way.
10. Should I Consider Zoning for Better Efficiency?
If you have a larger home, or a home with hot and cold spots, zoning can be a game-changer.
Zoning divides your home into sections — like bedrooms, living areas, or a basement — so you only heat or cool the areas you use most.
It requires extra dampers and a more sophisticated thermostat setup, but it can:
✅ Cut energy use by 20–30%
✅ Improve comfort
✅ Extend system lifespan by reducing short-cycling
If you want to read more about home zoning and its pros and cons, This Old House has a solid article you can read at this link.
Conclusion: Ready to Take the Next Step?
Installing a 5-ton R-32 AC and gas furnace combo is a big job — and a big investment — but the payoff is serious comfort and serious energy savings.
I hope these FAQs help you feel a bit more prepared for the process. Remember:
✅ Work with a licensed pro who can do a proper load calculation.
✅ Choose a high-efficiency combo with the right SEER2 and AFUE ratings for your climate.
✅ Don’t skimp on maintenance after install — your system will last longer if you take care of it.
And if you’re ready to look at some top-rated combos, head on over to The Furnace Outlet’s 5-ton R-32 page — they make it easy to shop and plan your next upgrade.
Have more questions? Feel free to reach out — helping folks like you stay comfortable is what I do.
