What to Expect When Replacing Your Home’s AC System

We Just Replaced a 1,584 sq ft Home’s AC — Here’s What It Really Involved

We recently got a call from a homeowner — let’s call her Sarah — who was ready to replace the entire AC system in her 1,584 square foot home. She’d done some research online, but the more she read, the more confusing it got: wildly different prices, mixed opinions about brands, and almost nothing that clearly explained timelines, warranties, or what happens with the ductwork.

On the phone, she hit us with the same questions most homeowners have but don’t always know how to ask. If you’re in the same boat as Sarah, this walkthrough of her questions and our answers will give you a clear picture of what to expect when you replace your home’s AC system.

Free Estimates & How Quickly We Can Get There

Sarah’s first question was simple: “Do you offer free estimates, and how soon can someone come out?”

Yes — we offer free in-home estimates for full system replacements. For something as big as an AC changeout, we never want to guess over the phone. We need to see:

• Your home’s square footage and layout
• Existing equipment (indoor and outdoor units)
• Ductwork condition and size
• How the system is performing (hot/cold spots, humidity, noise)

In Sarah’s case, we had an estimator already in the area, so we could potentially get there the same afternoon. Other times, especially when the season gets busy, we may be booked out several days. Typically, you can expect:

• Slow/shoulder seasons: Often same day or next day visits
• Busy peak season: 2–7 days out, depending on schedule and equipment availability

If your system is completely down in extreme heat, tell us that up front. We do our best to prioritize no-cool emergencies.

How Much Does a Full AC Replacement Really Cost?

Once we had square footage — about 1,584 square feet — Sarah asked the big question: “What’s the average cost to replace the system?”

Over the phone, we can only give a range, because price depends on several factors:

• Type of system: Traditional AC with gas/propane furnace vs. all-electric heat pump
• Efficiency rating (SEER/SEER2): Higher efficiency usually means higher upfront cost, lower bills
• System size (tonnage): Based on your home’s load, not just square footage
• Electrical or refrigerant line updates: Sometimes needed with newer equipment
• Ductwork changes: Extra returns, resizing, or sealing

For a home similar to Sarah’s, a full system replacement is commonly in the $7,000 to $15,000 range. It can be a bit lower or higher depending on the choices above and any extras like advanced filtration or smart controls.

Why the big range? The difference between an entry-level system and a high-efficiency, feature-rich system (plus duct upgrades) can be several thousand dollars. That’s exactly why an in-home evaluation is so important.

How Long It Takes: From Scheduling to Cold Air

Next, Sarah wanted to know: “Once I say yes, how long until it’s installed and running?”

There are really two timelines to think about:

1. Time from estimate to install date
   In many cases, if we have equipment in stock and room on the schedule, we can do a changeout within 24–48 hours after you approve the quote. In busier times, we may be booked out until later the same week or into the next.
2. Time to actually do the install
   For a straightforward replacement (no major duct or electrical work), most jobs take one full day. More complex projects with significant duct modifications or add-ons might stretch into a second day.

Before we leave, we:

• Start up and test the system
• Check temperature split and airflow
• Register warranties (or walk you through it)
• Show you how to use any new thermostat or features

Understanding Your AC Warranties: Parts & Labor

Sarah’s next concern was warranties: “Do you offer warranties with installation, and how do they work?”

Every system we install comes with two main types of coverage:

• Parts warranty: Our installs include a 10-year parts warranty from the manufacturer (assuming registration requirements are met). That covers major components like the compressor, coils, and many internal parts.
• Labor warranty: Our standard installation includes a 3-year labor warranty. That means if a covered part fails during that time, you’re not paying us to come back out and replace it.

On top of that, we offer options to extend the labor coverage for an additional cost — typically to 5 or even 10 years. It’s a bit like adding a protection plan: you pay more upfront, but you’re more insulated from surprise repair bills later, up to the cost of the equipment.

When we’re in your home, we walk you through exactly:

• What’s covered and for how long
• What voids the warranty (for example, unlicensed work or skipped maintenance in some cases)
• How to make a claim if you ever need to

What About My Ductwork? Inspecting, Modifying, and Adding Returns

Sarah also asked something homeowners often forget: “Will you inspect or modify my ductwork if needed?”

The short answer: absolutely, yes. Putting a brand new system on top of bad ductwork is like putting new tires on a car with a bent frame.

During an estimate, we look for:

• Leaky ducts: Visible gaps, loose connections, or crushed runs
• Insufficient return air: Your system can’t breathe if it doesn’t have enough return ducts
• Incorrect sizing: Ducts too small (or sometimes too large) for the system
• Comfort issues: Rooms that are always too hot or too cold

Sometimes we recommend adding extra returns or resizing ductwork, especially if we’re upsizing the equipment or installing a more advanced system that needs proper airflow to perform well.

Fixing duct issues upfront can:

• Reduce hot and cold spots
• Improve efficiency and lower energy bills
• Help your new system last longer

Getting Ready for Your Own AC Replacement

If you’re thinking about replacing your home’s AC system like Sarah, here’s what you can do to prepare:

• Have your home’s square footage handy
• Know whether you’re on electric, gas, or propane
• Think about comfort issues you want solved (noise, hot rooms, humidity)
• Ask about warranty options and whether extended labor coverage makes sense for you
• Be open to ductwork recommendations — they’re often the key to getting the most from your new system

Replacing an AC system is a big investment, but with clear expectations about costs, timeline, warranties, and ductwork, the process doesn’t have to be stressful. When we come out for a free estimate, our goal is to walk you through all of this in person so you can make a confident, informed decision.