Lennox AC Installation Nationwide

Lennox AC Installation in Marietta: What to Know First

Lennox AC installation in Marietta typically runs $4,800 – $7,500 for a full system replacement, depending on the model line and your home’s ductwork. We’re an independent Lennox service provider in Marietta, not a factory-authorized dealer, which means we recommend the right Lennox unit for your square footage and budget without a manufacturer quota hanging over our heads. Most full installs are done in one day, and you’ll have a written price locked in before we unload a single tool. This page is for Marietta homeowners who either own a Lennox already and want to replace it, or are considering a Lennox for the first time and want straight answers on cost, reliability, and what actually happens during the install. Call (229) 514-0545 for a free estimate, or keep reading to learn exactly how we handle a Lennox AC installation.

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How Lennox Products Fail – and How We Fix Them

We’ve replaced enough Lennox units across Marietta to know each series has its own personality. Here’s what we actually see in driveways from East Cobb to Kennesaw Mountain:

• Merit Series (ML14XC1, ML17XC1) – capacitor stress in Georgia heat. The Merit line is Lennox’s entry-level single-stage condenser, and it’s a workhorse. But in Marietta’s July crawlspace-cooked attics, the run capacitor takes a beating from constant cycling. We regularly find Merit units with swollen or leaking capacitors by year six. When we install a replacement, we check the capacitor’s microfarad rating before we even consider wrapping the job, and we use OEM-spec components so you don’t lose compressor life to a $25 part.
• Elite Series (EL18XCV, EL296V) – variable-speed board failures after power surges. The Elite line is smart, efficient, and sensitive. Marietta gets its share of summer thunderstorms, and a close lightning strike or grid flicker can fry the variable-speed motor control board. The symptom you’ll notice first: the fan runs, but the compressor never kicks in, or the whole unit hums and does nothing. We see this three to four times a summer. The fix is board replacement with a surge protector installed at the disconnect box – a $40 add-on that saves the $600 board.
• Signature Series (SL28XCV) – inverter compressor communication errors. Lennox’s top-tier unit talks to the thermostat constantly, and when that communication drops, you get a “system communications failure” code on the iComfort thermostat. We’ve traced this on Marietta installs to nothing more exotic than a loose low-voltage wire at the condenser. Before anyone sells you a new board, our techs re-seat every low-voltage connection and run a continuity check. Half the time, that’s the fix.
• Evaporator coil corrosion – the classic Lennox weak point across all lines. Lennox has had more than its share of evaporator coil leaks over the years, especially on units built between 2010 and 2017. Formicary corrosion (tiny pinprick holes caused by acids in the air from household cleaners, paint, and even new carpet) eats through the copper tubing. If you’re losing refrigerant every season and no one can find the leak, ask the tech to do a nitrogen pressure test on the coil. On a new install, we coat the coil with anti-corrosion treatment before we ever charge the system.
• Condenser fan motor bearing wear on older Lennox units. On Lennox units over ten years old, we’ll hear the telltale squeal or grinding before you notice warm air. The fan motor bearings are sealed and can’t be lubricated, so once they start grinding, replacement is the only fix. We keep OEM-spec fan motors for common Lennox models on our trucks, because a dead fan motor in a Marietta August means 95 degrees in your living room by noon.

Our Lennox AC Installation Process

Here’s exactly what happens when you call Halden Heating and Air Marietta for a Lennox AC installation, step by step. No vague “we’ll take a look,” no four-hour window. You’ll know what’s happening and when.

1. 1
   Call or book online. A live person answers, day or night. We schedule the visit and you get a live arrival time you can track on your phone, same way you’d track a rideshare.
2. 2
   Load calculation and system assessment. Before quoting anything, we measure your home’s square footage, check window orientation, inspect existing ductwork, and calculate the actual cooling load (British thermal units, or BTUs, needed to cool your space). Marietta’s humidity means we size for humidity removal too, not just temperature.
3. 3
   Written price, locked in. You get the total installed price in writing before work starts. Equipment, labor, pad, lineset, permits, everything. If the number changes later, that’s on us, not you.
4. 4
   Removal and install. Our uniformed, background-checked techs remove the old condenser and evaporator coil, install the new Lennox unit, braze the copper lineset with nitrogen flowing through to prevent scale buildup inside the pipes, pressure-test, pull a vacuum, and charge the system to Lennox spec.
5. 5
   Test and tune. We run the system through a full cycle, measure temperature drop across the coil, check refrigerant pressures, verify airflow, and confirm the thermostat is communicating correctly. Before-and-after photos of the install go to your phone.
6. 6
   Guarantee walk-through. We walk you through what we did, hand you the written guarantee, and register your Lennox warranty with the manufacturer. Done right, or we make it right.

What Lennox AC Installation Costs in Marietta

In Marietta, a Lennox AC installation runs $3,500 to $7,500 depending on the system. Here’s the honest breakdown:

• Merit Series condenser + coil replacement: $3,500 – $4,900
• Elite Series full system (air handler + condenser): $4,500 – $6,200
• Signature Series high-efficiency install: $5,800 – $7,500
• Full system replacement with ductwork modifications: add $800 – $2,200

What moves the price? Square footage, whether you’re replacing the coil or the whole air handler, the efficiency level (SEER rating), and how much your existing ductwork needs to be adapted or replaced. We’ll put the exact number in writing before work starts. Call (229) 514-0545 for a free estimate. You’ll get a straight answer, written price, done right.

Why Marietta Homeowners Call Halden Heating and Air Marietta for Lennox Work

Marietta homeowners call us for Lennox work because we run on transparency. Every Lennox install and repair we do comes with a written price before work starts, a written guarantee on the job itself, and a 365-Day Done Right Promise. If something’s not right within a year, we’re back, no charge. If the repair fails, the second visit is free. No arguing, no fine print. We’re part of the Relay Home Co. network, which means we’re held to The Relay Visibility Guarantee: you’ll see who’s coming, when they’ll arrive, and what it costs before it happens. Andre Fuller built this company on a rule he learned early: put the price in writing before anyone opens a panel. And when a Lennox unit has a problem that’s beyond sensible repair, we can also service or quote Carrier and Trane systems if you want options. But if you’re committed to Lennox, we’ll install it right.

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