Seasonal 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.
Before
After
Before
After
Before
AfterFast, Reliable AC Installation Across Lawrenceville
Most AC installations in Lawrenceville run $3,500-$7,500 for a complete system replacement, and we schedule every job with a firm install date after a proper load calculation and written fixed-price quote. If your home was built during Gwinnett County’s 1990s-2000s boom, you’re probably dealing with a builder-grade system sized by rule of thumb, original R-22 refrigerant that’s now illegal to recharge, and flex duct that’s spent two decades baking in 130°F attic heat. That’s the exact replacement scenario our AC Installation team handles every week in Lawrenceville neighborhoods from Sugarloaf to the Hamilton Mill corridor.
We dispatch and schedule from our Atlanta office, but our crews live and work in the Lawrenceville area. We know the difference between a 1995 split-level off Pleasant Hill Road and a 2005 two-story near Hwy 316, and we know both likely have attic ductwork that needs attention before any new equipment goes in. Call (817) 402-2972 for a free estimate with a written price before any work begins.
Why Coldharbour Heating & Air Is Lawrenceville’s Preferred AC Installation Company
We’ve been part of the Kingswell network since 2003, and our independently owned and operated structure means decisions are made locally, not by a distant corporate office. When you call about AC installation in Lawrenceville, a live person answers the phone 24 hours a day, 7 days a week. No voicemail trees, no callbacks tomorrow morning.
Our technicians are background-checked, uniformed, and trained on nine major residential HVAC brands including Rheem, York, and Daikin. We carry common parts for Lawrenceville’s most prevalent systems, which means faster turnaround when your original builder unit finally quits in July. Every installation comes with our written 365-Day Done Right Promise: if anything we installed fails within a full year, we come back and correct it at no charge. The guarantee goes on paper before our technician leaves, not as a verbal afterthought.
We also follow The Kingswell Way on every Lawrenceville job: say the price before the work starts, show up in the window we gave you, leave the place cleaner than we found it, put the guarantee in writing, and come back if it fails. Homeowners in Lawrenceville have heard plenty of verbal promises from contractors. We stopped doing business that way years ago.
Ductless Mini Split Installation in Lawrenceville
Ductless Mini Split Installation in Lawrenceville solves the cooling problems that central duct systems can’t fix, especially in the split-level and two-story builder homes that dominate Gwinnett County’s 1990s-2000s subdivisions. A mini split uses an outdoor compressor connected to one or more indoor wall or ceiling units through a small refrigerant line, so it delivers conditioned air directly into the room without relying on attic ductwork that’s partially collapsed or was never sized right in the first place.
For Lawrenceville homeowners, this matters because so many upstairs bedrooms, converted garages, and finished basements in Sugarloaf-area homes never received adequate airflow from the original central system. Rather than tearing open walls to add duct runs through 130°F attics, a ductless mini split gives you independent temperature control in that problem zone. Most single-zone installations in Lawrenceville fall within our standard AC installation range of $3,500-$7,500, with multi-zone systems priced based on the number of indoor heads and electrical work required.
When a Mini Split Beats Duct Replacement
If your central system is otherwise functional but one room never cools, replacing the entire duct network often costs more than a targeted mini split and still leaves you with a single thermostat fighting itself. We see this constantly in Lawrenceville’s older subdivisions off Pleasant Hill Road, where bonus rooms over garages were afterthoughts in the original design.
Heat Pump Mini Splits for Year-Round Use
Lawrenceville’s Climate Zone 3A means real heating demand in winter, not just cooling. Daikin and Rheem heat pump mini splits we install provide both, with auxiliary electric backup for the coldest January nights. One system, no separate baseboard heaters, no ductwork to leak.
AC Replacement in Lawrenceville
AC Replacement in Lawrenceville right now is dominated by one demographic reality: hundreds of subdivisions built during Gwinnett County’s suburban explosion are simultaneously hitting the 20-25 year replacement window for their original builder-grade equipment. If your home went up between 1988 and 2008, especially in the Hwy 316 corridor or Hamilton Mill area, your system was likely a minimum-code R-22 split system with flex duct routed through an unconditioned attic. That equipment is now at end-of-life, the refrigerant is banned from production, and the ductwork has degraded from two decades of extreme attic heat.
A homeowner in the Hamilton Mill corridor called us about a second summer of uneven cooling in a 2003 two-story, and we found the original R-22 builder system still on its factory charge, the evaporator coil leaking, and a run of flex duct collapsed at the plenum in the attic where it routinely hits 130°F. We quoted a full system-and-duct replacement on that first visit - new heat pump with auxiliary backup, a load calculation to right-size tonnage, and sealed ductwork - and the upstairs bedrooms finally held temperature in August while the old unit’s static pressure problem went away with the rebuilt duct system.
Complete AC replacement in Lawrenceville typically runs $3,500-$7,500 depending on system size, ductwork condition, and whether electrical or refrigerant line upgrades are needed. We do not quote over the phone; every replacement starts with a site visit and load calculation.
The R-22 Orphan Problem
Replacing only the outdoor condenser while keeping your original indoor coil is a shortcut that leaves you with a mismatched system, no manufacturer warranty, and an evaporator coil that’s still leaking R-22 you can no longer legally recharge. We see contractors in Lawrenceville still selling this “condenser-only” replacement. We won’t do it.
Load Calculation Before Equipment Selection
Your original builder probably sized your system by square footage rule of thumb, which is why your upstairs never cooled properly. We run a Manual J load calculation on every Lawrenceville replacement to determine actual cooling and heating requirements, then size equipment accordingly. Right tonnage matters more than brand name.
Trusted Brands We Service in Lawrenceville
Our technicians train continuously on nine major residential HVAC brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For Lawrenceville’s replacement market, we stock common Rheem and York heat pumps and air handlers locally, plus Daikin ductless components for mini split installations. That inventory means when we quote a system during your estimate, we’re not ordering equipment from a warehouse three states away and hoping it arrives by your install date. We also maintain relationships with Bryant distributors for higher-efficiency options when a Lawrenceville homeowner wants to maximize utility rebates or long-term operating savings. Fast parts availability matters when your system dies in August and your attic ductwork can’t wait.
Common AC Installation Problems We See in Lawrenceville Homes
- Wrong-tonnage replacement equipment. The original builder sized your system by rule of thumb, so a replacement using the same tonnage repeats the mistake. Your upstairs in that Sugarloaf two-story never cools because the system was always undersized for the load, not because you need more insulation.
- Collapsed flex duct at the plenum. After twenty years in 130°F attic heat, the flex duct connection to your air handler has often separated or collapsed. Install new equipment on degraded ductwork and you’ve spent thousands to inherit the same static pressure problem that starved your bedrooms of airflow.
- Orphan R-22 systems with no recharge path. That original builder charge is gone, leaked out through the evaporator coil, and R-22 production ended in 2020. A homeowner who replaces only the condenser ends up with mismatched equipment, zero warranty coverage, and a coil that still leaks.
- Mold and microbial growth in aging air handlers. Lawrenceville’s persistent summer humidity breeds biological growth in unconditioned attic air handlers, especially on original equipment with inadequate drainage or rusted condensate pans. We inspect and address this during every replacement estimate because the new system deserves clean ductwork.
Pricing for AC Installation in Lawrenceville, GA
We put pricing in writing before any work begins. That’s The Kingswell Way, and it’s non-negotiable on every Lawrenceville job.
| Service | Typical Range in Lawrenceville |
|---|---|
| AC Installation (complete system replacement) | $3,500 - $7,500 |
| AC Repair | $150 - $650 |
| Annual Tune-Up | $80 - $200 |
What moves a Lawrenceville installation toward the higher end: ductwork remediation or full replacement, electrical panel upgrades to support higher-efficiency equipment, refrigerant line set replacement when the old lines are incompatible with modern refrigerants, and multi-zone mini split configurations. What keeps costs controlled: straight condenser-and-air-handler swap with intact, properly sized ductwork and adequate electrical service. We never upsell what you don’t need, and our technicians are not paid commission on equipment sales. The price we write is the price you pay. Call (817) 402-2972 for a free estimate with no obligation.
We Also Serve Cities Near Lawrenceville
Our crews work throughout Gwinnett and surrounding counties, with regular installation and replacement calls in Lawrenceville plus Buford, Norcross, Lilburn, and Duluth. The same written pricing, same load-calculation standard, and same 365-Day Done Right Promise apply whether you’re off Pleasant Hill Road or up near the Mall of Georgia. Dispatch and scheduling are coordinated from our Atlanta office, with local technicians serving each community.
Serving Lawrenceville, GA - Our Local Coverage Area
We’re based in the Lawrenceville 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 Lawrenceville
You need the full system replaced, including indoor coil and often the ductwork. Your original R-22 system is illegal to recharge, the evaporator coil is likely leaking, and keeping it with a new condenser voids your manufacturer warranty and leaves you with mismatched equipment. Call (817) 402-2972 and we’ll assess whether your flex duct needs replacement too - estimates are free.
Because the new system was probably sized by the old system’s tonnage instead of a proper load calculation, and the attic ductwork was never addressed. In Lawrenceville’s two-story builder homes, undersized or collapsed flex duct in 130°F attics is the root cause, not the equipment itself. We fix this by running Manual J calculations and inspecting duct integrity before quoting any replacement.
Manufacturer parts warranties typically cover compressor and major components for 5-10 years, but only if the system was installed by a licensed contractor with a registered, matched indoor coil and proper refrigerant charge. Mismatched equipment, DIY installation, or failure to register the unit within 60 days often voids coverage. Our installations include warranty registration paperwork handled for you, plus our independent 365-Day Done Right Promise on labor.
A mini split makes sense when your central system is functional but one zone - an upstairs bedroom, converted garage, or finished basement - never receives adequate airflow. In Lawrenceville’s split-level and two-story homes with attic ductwork problems, targeted mini split installation often costs less than full duct remediation while solving the actual comfort issue. We assess both options during your free estimate.
Minimum federal SEER2 standards now require 14.3 SEER2 for split systems in our region, but most Lawrenceville homeowners choose 15-17 SEER2 for the balance of upfront cost and utility savings. The “2” matters because 2023 testing standards changed - a 16 SEER2 unit performs more efficiently in real-world conditions than the old 16 SEER rating suggested, especially in Lawrenceville’s humid, high-runtime summers. Higher SEER2 also means better humidity control, which protects against the mold growth we see in so many local attics.
Written by Victor Mancini, Owner at Coldharbour Heating & Air, serving Lawrenceville since 2003.