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
Most AC installations in Kennesaw run between $3,500 and $7,500, and the job usually takes one full day when the existing ductwork and electrical panel can support the new system. That last part matters more in Kennesaw than almost anywhere else in Cobb County. The city’s block-by-block mix of 1960s ranch homes and 2000s-era subdivisions means a box-swap install often fails because the house itself was never set up for modern equipment. Our AC Installation team handles that first, before a single new unit goes in. Call us at (229) 514-0545 and we’ll send a technician who knows Kennesaw’s housing stock cold.
Why Halden Heating and Air Marietta Is Kennesaw’s Preferred AC Installation Company
We’re not some giant call center that happens to have a truck near Kennesaw. Andre Fuller runs this operation, and he’s built it around a simple promise: a written price before any work starts, a written guarantee on every install, and a live person on the phone 24/7. Kennesaw homeowners deal with us directly, not a dispatch board in another state. Our Kennesaw customers get a live arrival time they can track to the door, so there’s no sitting around waiting on a four-hour window in July heat.
What builds trust here is simple. We don’t do door-step price changes. The price we quote is the price you pay, locked in writing before tools come off the truck. And every installation carries our 365-Day Done Right Promise: if something isn’t right within a full year, we come back and make it right. No arguing, no fine print, no “that’s not covered.” The background-checked technician we send to Kennesaw arrives in uniform with a name you’ll know before they pull up.
We also answer the phone. At 2 a.m. in a Kennesaw summer when your AC is dead, you get a real person on our AC Repair - Kennesaw line, not a voicemail tree. That’s the Relay Visibility Guarantee, and it’s standard on every job we do, not an add-on.
Styles & brands we work with
HVAC Installation in Kennesaw
HVAC Installation in Kennesaw almost always means more than swapping an outdoor condenser for a newer one. In older neighborhoods like the brick ranch streets around downtown, we regularly find original 1970s gas furnaces still running, paired with mismatched newer air conditioners. The ducts, meanwhile, were sized for a different era of equipment. A proper install here means a full load calculation first: room by room, window count, insulation levels, and a static pressure test on the existing ductwork. Skip that, and a new high-efficiency system chokes on ducts that can’t move enough air. Kennesaw installs in newer 2000s subdivisions are different. Those homes usually have ducts that can handle a modern SEER2 unit, but the equipment sizing still has to match the square footage and the big open floor plans. Either way, expect $3,500 to $7,500 for a complete replacement, and one day on site for most single-zone homes.
Sizing and Duct Reality
In Kennesaw, we size the system to the house as it actually exists, not by a rule-of-thumb like “500 square feet per ton.” That shortcut fails constantly in older ranches and split-levels. We measure, we test static pressure, and we tell you honestly whether your ducts can carry the airflow a new SEER2 condenser requires.
Why a Box-Swap Fails in Older Homes
A new 2-ton condenser bolted onto a 1970s duct system that can’t move 800 CFM without high static pressure leads to frozen coils and early blower motor failure. We see this in Kennesaw month after month, usually as a follow-up to a cheap install. Fixing the house first costs less than replacing a burned-out blower twice.
Heat Pump Installation in Kennesaw
Heat Pump Installation in Kennesaw is growing fast as homeowners look for one system that cools through the muggy summer and heats without a gas furnace on mild winter days. Kennesaw’s humid subtropical climate means a heat pump runs in cooling mode from May through September, then switches to heating in those occasional freezing stretches. That year-round load is exactly why heat pumps here have to be sized carefully: undersized and they can’t keep up in August; oversized and they short-cycle and never properly dehumidify. A typical heat pump installation in Kennesaw runs $3,500 to $7,500 depending on the home’s square footage, duct condition, and whether you’re going with a standard or high-efficiency inverter model. Our team installs Trane and Lennox heat pumps most often in this area, and every job includes the written price and the 365-Day Done Right Promise.
Ducted vs. Ductless
In older Kennesaw homes with original ductwork that’s too restrictive, a ductless mini-split heat pump can be the smarter fix: no ducts to fight, zoned comfort per room, and efficiency that shines in our humidity. But it’s not right for every house. We’ll show you both options with real numbers before you choose.
The Dehumidification Factor
Kennesaw summers are humid, not just hot. A properly sized heat pump with a variable-speed blower manages that moisture far better than an old single-stage unit ever did. That’s the difference between a house that feels cool and a house that actually is.
Trusted Brands We Service in Kennesaw
We’re certified to install and service equipment from Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. In Kennesaw specifically, we stock common parts for Trane, Lennox, and Goodman units locally, which means faster turnaround when a capacitor or a control board fails on a 95-degree day. We also carry Rheem equipment options for homeowners who want a solid mid-range system without the premium price tag. The brand matters less than the sizing and the install quality. We’ll be straight with you about that.
Common AC Installation Problems We See in Kennesaw Homes
- Undersized original ductwork in 1960s-70s ranches. The ducts were designed for furnaces with half the airflow demand of a modern air conditioner. A new unit connected to those ducts runs at high static pressure from day one, which shortens blower motor life and reduces cooling output in the farthest rooms.
- Electrical panels that can’t handle a modern heat pump. Older Kennesaw homes often have 100-amp panels with no spare breakers, sometimes with aluminum branch wiring. A new heat pump’s startup load trips breakers, or worse, stresses the compressor. We check the panel before recommending equipment.
- Unbalanced split-level floor plans. In Kennesaw’s 1980s-90s split-levels, a single-zone system leaves upstairs bedrooms 8 degrees warmer while the downstairs overcools. Without zoning or damper adjustments, the thermostat never satisfies, the system runs constantly, and rooms stay uncomfortable.
- Mismatched equipment from past partial replacements. We often find a newer air conditioner paired with an original 1970s furnace, usually because a previous owner replaced only what failed. The blower can’t deliver the airflow the AC needs, and efficiency drops sharply. A full system match is the fix.
See the difference
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After
Before
After
Before
AfterPricing for AC Installation in Kennesaw, GA
Here’s the honest range for Kennesaw: a complete AC installation or replacement typically lands between $3,500 and $7,500. What pushes a job to the top of that range? Larger square footage, duct modifications or replacement, electrical panel upgrades, high-efficiency variable-speed equipment, and zoning. What keeps it at the lower end? A straightforward swap in a newer home with properly sized ducts and an adequate panel. Every quote we give is a written, fixed price before any work starts. No one touches your system until you’ve seen the number and approved it. Call (229) 514-0545 for a free estimate, and we’ll walk the house with you and explain exactly what your home needs.
Honest Pricing by the Numbers
Here’s what drives cost in Kennesaw’s housing stock, with realistic ranges for common scenarios:
| Item | Typical Range | When It Applies in Kennesaw |
|---|---|---|
| AC Installation / Replacement | $3,500 – $7,500 | Complete system replacement, most Kennesaw homes |
| Duct Modification or Replacement | $800 – $3,200 | Older 1960s-70s homes with undersized or leaky ducts |
| Electrical Panel Upgrade | $1,200 – $2,800 | 1960s-era 100-amp panels that can’t support a modern heat pump |
| SEER2 High-Efficiency Upgrade | +$1,800 – $3,500 | Moving from 14 SEER2 to 17-20 SEER2 variable-speed equipment |
These are the ranges we quote on the ground in Kennesaw, not national averages. A 1976 ranch near downtown with original ducts and a 100-amp panel will land near the top of the range once the house is brought up to code. A 2008 subdivision home with a newer panel and ducted system may stay near $4,000 to $5,000. The only way to know is a real assessment, which we do for free.
We Also Serve Cities Near Kennesaw
Our AC Installation crew covers Kennesaw and the surrounding communities: Acworth, Marietta, Woodstock, and Powder Springs. Each area has its own housing stock quirks, but the pricing, guarantees, and written-quote policy stay exactly the same. If you’re in a neighboring city, the team you get is the same crew that works Kennesaw daily.
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
Because the original ductwork was sized for a furnace moving far less air than a modern air conditioner needs. A new high-efficiency unit connected to those ducts runs at high static pressure from day one, which causes frozen evaporator coils, short-cycling, rooms that never cool, and premature blower motor failure. The fix is measuring the ductwork and modifying it before installing the new system. Call (229) 514-0545 and we’ll measure yours before quoting anything.
Often, yes. A 1960s-era 100-amp panel with no spare breakers and possibly aluminum branch wiring often can’t support a modern heat pump’s startup load. Skipping that review leads to nuisance trips, compressor stress, and eventual failure. We review the panel on every install and include any needed upgrade in the written quote upfront, so there are no add-on surprises.
You can, but you’ll be leaving real efficiency on the table. The old furnace’s blower motor usually can’t deliver the airflow a new high-efficiency AC requires, so the new system underperforms and runs harder than it should. In many Kennesaw homes, a matched full-system replacement with a properly sized blower is the better long-term investment. We’ll show you the numbers both ways before you decide.
The home’s floor plan was never balanced for a single-zone system. Upstairs rooms get hot because heat rises and the duct runs to those rooms are longer and more restrictive, while the downstairs overcools and the thermostat never satisfies. The fix is zoning, damper adjustments, or in some cases a ductless mini-split for the hot rooms. We diagnose and correct this rather than leaving you with a house that’s comfortable in one room and miserable in another.
SEER2 is the updated efficiency testing standard that reflects real-world ductwork resistance. In Kennesaw’s muggy summers, a properly sized SEER2 system with a variable-speed blower dehumidifies far better than an older single-stage unit, which makes a big difference in actual comfort indoors. The higher the SEER2 rating, the lower your cooling cost, but only if the ducts can deliver the airflow the unit needs. That’s why we test static pressure before recommending a SEER2 upgrade. Call (229) 514-0545 and we’ll walk you through what makes sense for your house.
Written by Andre Fuller, Owner at Halden Heating and Air Marietta, serving Kennesaw since 2004.