Furnace & heating
AC repair
Heat pumps
Ductless mini splits
Carrier
Trane
GoodmanSeasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateFast, Reliable AC Installation Across Smyrna
A new AC system in Smyrna typically runs between $3,500 and $7,500 for a complete installation, and most replacements can be completed in a single day. That’s the number you need, and we’d rather you have it before you pick up the phone. Cold Harbour Heating and Air Marietta has been installing and replacing cooling systems across Smyrna for years, and our crews know exactly what these homes throw at a new unit: slab-embedded ductwork, tight closets, and summers that never seem to quit. If you’re in Forest Hills, Belmont, or anywhere else in Smyrna, call (762) 240-5599 for a free estimate with a written price before any work begins.
Why Cold Harbour Heating and Air Marietta Is Smyrna’s Preferred AC Installation Company
Smyrna homeowners keep calling us back for one reason: we put the price in writing before a single tool comes out of the truck. Victor Mancini, who runs our crews, insists on it. You’ll know the exact cost of your AC installation before we start, and that number won’t change at your door.
Our technicians are background-checked and uniformed, so you know exactly who’s walking through your front door. They’re trained on Trane, Lennox, Goodman, and Rheem equipment, plus five more major brands, which means we’re not pushing one manufacturer’s gear onto your home. We size the system to the house you actually have, not the house a sales script assumes you have.
The 365-Day Done Right Promise covers every installation we do in Smyrna. If something isn’t right within a full year, we come back and correct it at no charge. That guarantee is written down, not spoken and forgotten. Phones are answered by a live person 24 hours a day, 7 days a week, so if your new system trips at 2 a.m. during a July heat wave, a human picks up. No voicemail tree. No “we’ll call you in the morning.”
Styles & brands we work with







AC Replacement in Smyrna
AC Replacement in Smyrna means pulling out an underperforming system and putting in one that’s sized for the house as it stands today, not as it was built in 1965. Many original ranch homes in Belmont and Forest Hills were equipped with 2-ton or 2.5-ton units under 1960s load assumptions, and those systems now run nonstop on Smyrna’s hottest afternoons. The result is a compressor that never cycles off and a power bill that climbs every summer. Replacement in Smyrna runs $3,500 to $7,500 depending on system size and duct condition.
When Replacement Beats Another Repair
If your AC is over 12 years old and uses R-22 refrigerant, repair costs start compounding fast. Parts for those older systems are getting scarce, and a failed compressor on an aging unit can run $1,500 or more toward a machine that’s already limping. We’ll tell you honestly when replacement is the smarter money. If a repair will keep the system running reliably, we’ll do the repair. If not, we’ll show you the numbers for replacement and let you decide.
Sizing for Smyrna’s Humidity
Smyrna’s humid subtropical climate means your AC does two jobs: dropping temperature and pulling moisture out of the air. An oversized unit cools the house quickly but never runs long enough to dehumidify, leaving you with cold, clammy air. An undersized unit runs all day and still can’t hold 75 degrees in August. We run a proper load calculation on every replacement, which takes into account your home’s square footage, window orientation, insulation levels, and duct condition.
Central Air Conditioning Installation in Smyrna
Central Air Conditioning Installation in Smyrna is about fitting a properly sized, high-efficiency system into homes that were never designed for modern equipment. That means attics with tight clearance, closets that squeeze the air handler, and slabs with ductwork we can’t see without a camera. Installation costs in Smyrna run $3,500 to $7,500, with the final number depending on system size, SEER2 rating, and whether your existing ducts need sealing or replacement. We give you that number in writing before work starts.
Ductwork Evaluation Before Installation
Every central air installation in Smyrna starts with a duct inspection. In the ranch and split-level homes built between the 1950s and 1970s, ducts often run through slab foundations or crawlspaces. If those ducts are leaking, a brand-new AC will still underperform. We inspect with cameras, measure static pressure, and tell you exactly what needs fixing before we quote the job. Sometimes the fix is sealing joints. Sometimes it’s replacing sections outright.
High-Efficiency Retrofits in Tight Spaces
Fitting a high-SEER2 unit into a tight attic or closet without correcting static pressure is how blower motors burn out within two summers. That’s a failure we’ve seen in Smyrna townhomes where the air handler shares a closet with a water heater and no return plenum has room to breathe. We plan the retrofit around airflow first, equipment second. If that means adding a return or enlarging a grille, we include it in the written price you get up front.
Trusted Brands We Service in Smyrna
Our crews install and service Trane, Lennox, and Goodman systems on a regular basis, and we stock common parts for those brands locally so Smyrna customers aren’t waiting a week for a capacitor or a defrost board. Rheem and the other major residential brands are no problem either. The point isn’t the badge on the unit. The point is that we size it right, install it cleanly, and stand behind it in writing. When a homeowner in Smyrna needs a specific solution, whether that means a variable-speed heat pump or a simple single-stage replacement, we can offer whichever brand actually fits the need.
Common AC Installation Problems We See in Smyrna Homes
- Undersized tonnage from original 1960s load assumptions. The compressor runs nonstop on Smyrna’s hottest afternoons and energy bills spike even though the house never quite cools. The fix is a proper load calculation, not another 2-ton unit dropped in the same spot.
- Slab-embedded duct leaks pulling humid crawlspace air into the return. The evaporator coil gets overwhelmed, floors feel damp, and the system can’t hold humidity below 60 percent. We find these leaks with a camera and fix them before installing the new equipment.
- High-SEER2 retrofits jammed into tight attic or closet spaces without correcting static pressure. Blower motors burn out within two summers because the fan is working against ductwork it can’t push through. Airflow first, equipment second.
- Uneven cooling between rooms in older ranch homes. Original duct layouts often shortchange back bedrooms, and without a dedicated return in those rooms, the air stagnates. Duct modifications or a zoned system solves this in most Smyrna homes.
See the difference
Before
After
Before
After
Before
AfterPricing for AC Installation in Smyrna, GA
| Service | Price Range |
|---|---|
| AC Installation | $3,500 – $7,500 |
| AC Repair | $150 – $650 |
| Furnace Installation | Call for quote |
| Tune-Up | $80 – $200 |
Every quote includes a written price handed to you before work begins. No changes at the door, no surprise line items. Call (762) 240-5599 for a free estimate specific to your home in Smyrna.
We Also Serve Cities Near Smyrna
Our crews work throughout Smyrna and the surrounding area, so if you’re just over the line in Marietta, Mableton, Powder Springs, or Kennesaw, the same pricing and the same written guarantee apply. Dispatch and scheduling are coordinated from our metro office, and the crews that serve Smyrna know this area’s houses, streets, and duct layouts. Same written price, same 365-Day Done Right Promise, same live-person phone coverage.
Serving Smyrna, GA - Our Local Coverage Area
We’re based in the Smyrna area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About AC Installation in Smyrna
Can I install a heat pump in my Smyrna ranch home if there’s no natural gas line on my street?
Yes, a heat pump is often the best choice for Smyrna homes without natural gas. A heat pump moves heat rather than generating it, so it cools in summer and heats in winter using electricity alone. In Smyrna’s mild winters, most heat pumps operated efficiently enough that a backup heat strip only kicks on during rare below-freezing stretches. Installation costs run the same $3,500 to $7,500 range as central AC, and you get both heating and cooling from one system. Call (762) 240-5599 to talk through whether a cold-climate heat pump makes sense for your ranch.
Why does my new AC in a Belmont home cool unevenly between the den and the back bedrooms?
Uneven cooling in Belmont homes is almost always a duct problem, not an equipment problem. The original 1960s duct layouts in those ranches often underserve back bedrooms, and if there’s no return register in those rooms, cooled air can’t circulate back to the air handler. We check static pressure and duct sizing to pinpoint exactly which runs are starving. In many cases, adding a return or resizing a branch duct evens out temperatures within a degree or two. We’ll inspect before we quote, so you know what you’re paying for.
Is a variable-speed AC worth the extra cost for a small 1950s ranch in Smyrna?
For most small ranches, a single-stage or two-stage AC is sufficient, and a variable-speed system may be more than you need. Variable-speed shines in larger homes with multiple zones or when humidity control is the primary complaint, because the system runs longer at lower speeds and strips more moisture from the air. In a 1,200-square-foot ranch, the extra cost of variable-speed equipment rarely pays for itself in energy savings alone. We’ll show you the numbers for both options and let you choose.
Do I need to replace my existing ductwork when I get a new AC installed in an older Smyrna townhome?
Not always, but older townhome ductwork needs a thorough inspection before you decide. In Smyrna’s infill townhomes, original duct runs often leak at joints, and if they’re undersized for the new system’s airflow requirements, a new AC won’t perform to spec. We inspect with a camera and measure static pressure before recommending anything. If ducts are in good shape and sized correctly, sealing the joints is usually enough. If they’re rusted, sweating, or collapsing, replacement is the better call. We’ll show you what we found and quote the fix before any work starts.
Can you install a mini split to cool a detached workshop behind my Smyrna house?
Yes, mini splits are an ideal solution for detached garages, workshops, and outbuildings in Smyrna. A ductless mini split mounts on the wall or ceiling and doesn’t require tying into your home’s ductwork, which makes it perfect for spaces where running ducts would be impractical. Sizing depends on the square footage and how the building is insulated, and a properly sized unit can hold a workshop at a comfortable temperature even during a Smyrna August. Give us the dimensions of your building and we’ll quote it free.
Contact Cold Harbour Heating and Air Marietta for AC Installation in Smyrna
If you’re ready to replace your AC or you’re building new and need a system sized right from the start, call us at (762) 240-5599. You’ll get a live person on the phone, a free estimate in writing, and an installation date that we actually keep. Victor Mancini and our Smyrna crews know these homes, these ducts, and these summers. We’ll get it right, and if something slips, the 365-Day Done Right Promise means we make it right at no charge.
Written by Victor Mancini, Owner at Cold Harbour Heating and Air Marietta, serving Smyrna, GA.