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 Kennesaw
A new air conditioning system in Kennesaw typically runs $3,500 to $7,500 installed, and most jobs are completed in a single day once equipment arrives. We’ve installed and replaced systems along Barrett Parkway, through downtown, and into Legacy Park long enough to know that no two Kennesaw homes are alike. The right system for a 1980s split-level near Cherokee Street is usually not the right system for a new build off Stilesboro Road. That’s why every installation here starts with a load calculation, not a guess. If you’re weighing a replacement or a first-time install, call (762) 240-5599 and we’ll give you a written price before any work begins.
Why Cold Harbour Heating and Air Marietta Is Kennesaw’s Preferred AC Installation Company
Homeowners in Kennesaw call us because we answer the phone. A live person picks up at (762) 240-5599 at 2 a.m. the same way they do at 2 p.m., and we give a firm arrival window instead of a vague “sometime Tuesday.” Our technicians are background-checked and uniformed, and they work on whatever system is already in the house, whether it’s a Trane, Lennox, Goodman, or Rheem. Victor Mancini, who leads our team, holds every job to the same written standard: price before work, guarantee on paper, and a clean job site when we leave. That’s the Kingswell Way, and it’s been the operating rule here since 2003.
We also know Kennesaw’s housing stock in a way an out-of-town shop simply cannot. Homes off Barrett Parkway tend to be newer builds with tight envelopes and attic HVAC systems. Homes near downtown and along Cherokee Street often still run 1980s and 1990s equipment with ductwork that has seen better decades. The result is that a one-size-fits-all install approach fails routinely here. We run a manual J load calculation on every job, check static pressure, and inspect the existing ducts before we recommend anything. That’s why our AC Installation team gets called back for second systems in the same neighborhoods year after year.
Styles & brands we work with
Heat Pump Installation in Kennesaw
Heat pump installation in Kennesaw is the most common request we field for homes that want efficient cooling and heating from one unit. A heat pump moves heat rather than generating it, which means it cools in summer and warms in the mild winters without needing a separate gas furnace. Most Kennesaw heat pump installs run $3,500 to $7,500, depending on the system size and the condition of the existing ductwork. In a climate where summer humidity sits heavy and winter rarely drops below freezing for long, a properly sized heat pump often makes more sense than a conventional AC plus furnace setup.
Heat Pump Sizing and Slab-on-Grade Homes
Newer subdivisions off Barrett Parkway and Stilesboro Road are full of slab-on-grade homes with HVAC systems tucked into attics. That’s a workable layout, but it punishes oversized equipment. Too big a heat pump short cycles, which means it cools the air fast without removing enough moisture. The house feels clammy, and the system wears out early. We size heat pumps to the actual heat load of the structure, not to a rule-of-thumb square footage chart.
What Kennesaw Homeowners Should Expect
A heat pump replacement in Kennesaw usually takes one full day. We disconnect and remove the old condenser and air handler, run new refrigerant lines where needed, and set the new unit on a pad or bracket with proper clearance. Before we leave, we verify airflow and refrigerant charge and hand you a written guarantee. Every heat pump we install is covered by the 365-Day Done Right Promise. If something fails within that year, we come back and make it right at no charge.
Ductless Mini Split Installation in Kennesaw
Ductless mini split installation in Kennesaw solves the problem that old ducts create. Many homes here, especially 1980s builds in Legacy Park and around Cherokee Street, have flex duct in the attic that has collapsed or separated over time. Running new ductwork through a finished house is invasive and expensive. A ductless mini split skips the ducts entirely. One outdoor condenser connects to slim indoor units mounted high on the wall or in the ceiling. Costs in Kennesaw run $3,500 to $7,500, with the final number driven by how many indoor zones you need.
Mini Splits for Rooms That Never Cool
We see this pattern constantly in Legacy Park. The original flex duct from the 1990s has collapsed in sections, so one bedroom stays 8 degrees warmer than the rest of the house. Rather than tear open the ceiling, a ductless mini split gives that room its own dedicated cooling and heating, controlled independently. It also lets you stop paying to condition rooms nobody uses.
Older Homes Without Attic Access on Every Side
Some of the older homes near downtown Kennesaw were built with limited attic clearance, and that makes central ductwork a nightmare on one side of the house. A mini split’s refrigerant lines run through a small hole in the wall, not through a chase. That’s often the cleanest and least disruptive answer, and it’s why our technicians recommend mini splits for so many retrofit jobs in the city’s established neighborhoods.
Trusted Brands We Service in Kennesaw
Our technicians install and service Trane, Lennox, Goodman, and Rheem equipment every week in Kennesaw. We don’t push a single brand. We recommend the system that fits your house, your budget, and the way you use your home. Because we work on these brands across the metro area, we keep common parts and filters stocked locally, which shortens turnaround when something breaks. If your current system is a Goodman and a heat pump from Trane makes more sense as a replacement, we’ll tell you why and give you a written price for both options before you choose.
See the difference
Before
After
Before
After
Before
AfterCommon AC Installation Problems We See in Kennesaw Homes
- Oversized units in newer Barrett Parkway subdivisions. Builders install tight, energy-efficient envelopes, then contractors drop in a 4-ton system without a load calculation. The result is short cycling, high humidity, and a moldy smell in the ducts. We size down and fix it.
- Collapsed flex duct in Legacy Park attics. The original ductwork in many of these homes has been sagging for twenty years. Replacing a condenser without inspecting the ducts wastes a new system’s efficiency and can kill a blower motor within two years from high static pressure.
- Condensers placed too close to property lines. Kennesaw has plenty of zero-lot-line subdivisions where outdoor units sit mere feet from a neighbor’s window. Older single-stage condensers are loud, and the city will respond to noise complaints. We position replacement units with setback and sound in mind.
- Pollen-clogged coils from Kennesaw’s tree cover. This city has dramatically more tree pollen than Acworth or Marietta. Spring oak and pine dumps coat outdoor coils in a yellow film that cuts efficiency fast. Every install we do in Kennesaw includes guidance on coil protection and a realistic filter-change schedule.
Pricing for AC Installation in Kennesaw, GA
A full AC installation in Kennesaw runs $3,500 to $7,500, and the spread comes down to system type, size, and the condition of your existing ductwork. Here’s the breakdown:
| Service | Price Range |
|---|---|
| Ductless Mini Split Installation | $3,500 – $7,500 |
| Heat Pump Installation | $3,500 – $7,500 |
What moves the number within that range? The number of indoor zones on a mini split, whether you’re replacing like-for-like or changing system types, and whether your ductwork is usable as-is. We give a written quote before any tools come out, and that price does not change at the door. Call (762) 240-5599 for a free estimate, and we’ll hand you the number in writing.
We Also Serve Cities Near Kennesaw
While this page focuses on Kennesaw, our crews regularly install systems in Acworth, Marietta, Woodstock, and Powder Springs. If you’re just outside the city line, you’re still in our service area. Read more about what we do across the region on our AC Installation in Kennesaw page, or call us with your address and we’ll confirm coverage.
Serving Kennesaw, GA - Our Local Coverage Area
We’re based in the Kennesaw 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 Kennesaw
Yes, most AC replacements in Kennesaw require a permit, and we pull it as part of the job. If the old ductwork fails inspection, which happens often in Legacy Park and Cherokee Street retrofits, the fix must be made before the job closes. We photograph what’s in the attic, show you the condition, and quote duct repair or replacement in writing before we touch it. Call (762) 240-5599 to schedule an inspection and get a full written quote.
Kennesaw’s tree cover is denser than Acworth’s, and the pollen load from oak and pine here is significantly heavier. That pollen coats your outdoor coil and fills your filter faster. We recommend Kennesaw homeowners check filters monthly during spring and swap them at least every 60 days, even on newer systems. A pollen-resistant mesh around the condenser coil helps, and we include it as an option on most installs.
Yes. Mini splits run refrigerant lines through an exterior wall, not through attic ductwork. For a slab-on-grade home with no practical attic path on one side, a ductless system is often the cleanest and least invasive option. We install single-zone and multi-zone mini splits in Kennesaw every month, and they run $3,500 to $7,500 depending on zone count.
The real fix is usually in the ducts, not the unit. Legacy Park homes built in the 1990s commonly have original flex duct that has collapsed or separated in the attic, creating uneven static pressure and 6 to 8 degree temperature swings between rooms. We measure static pressure, map the duct runs, and replace the failed sections or install a dedicated mini split for the problem room. Call (762) 240-5599 and we’ll come out and diagnose it properly.
SEER2 is the updated federal efficiency standard that reflects real-world duct pressure and starts appearing on units sold from 2023. A unit with a SEER2 rating is tested under more realistic conditions than the old SEER number, so the same efficiency rating means more actual savings in a Kennesaw attic system than it did under the old test. We’ll explain the difference on any quote and help you weigh the upfront cost against what you’ll pay on a Cobb EMC or Georgia Power bill over the system’s life.
If you’re ready for a straight answer on what a new AC system should cost in Kennesaw, call us at (762) 240-5599. We’ll send a technician who knows the city’s homes, gives you a written price before the work starts, and backs the job with a 365-day guarantee in writing.
Written by Victor Mancini, Owner at Cold Harbour Heating and Air Marietta.