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No obligationA calm guide for first-time AC buyers
AC Installation and Replacement for Your Home
Compare written quotes from local providers
A new air conditioner is one of the larger bills a homeowner will face. If you have never bought one, the choices can feel confusing. Brands, sizes, efficiency numbers and install details all affect the final price.
Significantconcern Heating & Air is a referral service. We connect homeowners in Cahokia Heights and the Cahokia Heights area with independent local providers who handle HVAC service, including AC installation and replacement. The providers do the work. This page explains how the process goes, what drives the price, and how to compare written quotes so you can decide at your own pace, with no obligation.
Is the AC out in a heat wave? Start here
If your system has quit and the house is hot and humid, take a breath. First, check the thermostat, the breaker and the air filter. A tripped breaker or a clogged filter is a cheap fix.
If those look fine, a provider can look at the unit. Many providers can respond quickly, but availability varies. Request a callback to check provider availability in your area.
Repair or replace? The money question
Sometimes the answer is emergency AC repair. A bad capacitor or a worn fan motor is often a modest bill. Other times, a repair only buys a little time.
A common rule of thumb: if the repair cost is a big share of a new unit, and the system is old, replacement may make more sense. Ask the provider to put both options in writing. Then you can compare before you commit.
Signs your AC may need replacing
No single sign tells the whole story. Look for a pattern.
- The unit is more than 12 to 15 years old.
- Repairs keep coming, and each one costs more.
- Your cooling bills climb while your habits stay the same.
- Some rooms stay warm or damp even when the system runs.
- The system is loud, short-cycles, or leaks.
- It uses an older refrigerant that is being phased out, which can make repairs costly.
Hot, humid summers are hard on a system. A unit that has run hard through many of them wears down faster.
Types of cooling systems
Most homes use one of a few setups. Knowing the names helps you read a quote.
- Central split system: an outdoor unit and an indoor coil, tied to your ducts. This is the most common choice.
- Heat pump: cools in summer and can also heat in winter. Cold climates may need a model made for deep frost.
- Ductless mini-split: a small outdoor unit and wall-mounted heads. Handy for homes without ducts.
- Packaged unit: all parts in one outdoor cabinet. Less common in homes with basements.
Your house shapes the choice. An older frame home may have tight or leaky ducts. A bungalow or ranch may be simple to fit. A provider can tell you what suits your layout.
Why proper sizing matters
Bigger is not better. An oversized unit cools fast, shuts off, and leaves the air sticky. It also cycles on and off more, which wears parts out.
An undersized unit runs nonstop and still falls behind on hot days. Good providers measure the home, check windows, insulation and ducts, and then pick a size. Be cautious if a quote picks a size only by matching your old unit.
What an AC installation includes
A full job is more than setting a box on a pad. Look for these items on the written quote.
- Removal and disposal of the old system
- A level pad or mounts for the outdoor unit
- A new indoor coil, or a check that the old one matches
- Refrigerant lines, wiring and a condensate drain
- A thermostat, new or reused
- Startup testing and a walk-through
- Permits, where your area requires them
If a line is missing, ask about it. A low price may leave items out.
Matching the system
The outdoor unit and indoor coil should be made to work together. A mismatch can cut performance and shorten life. Ask if the quote replaces both parts or only one, and why.
It also helps to ask about the furnace and ducts. If your blower is old or your ducts leak, the new AC may not perform as promised on paper. Fixing ducts can add to the price, but it can also help comfort.
If you are also weighing furnace replacement near me, ask providers whether doing heating and cooling together changes the price. Some jobs share labor and parts.
Efficiency in plain terms
AC efficiency is shown as a SEER rating. A higher number means the unit uses less power to make the same cool air. Higher-rated models usually cost more up front.
Ask what drives price here. If summers in your area are long and humid, a higher rating may pay back over time. If you use the AC only a few weeks a year, a mid-range model may be fair. Ask the provider to show the math in writing.
Also check for utility or manufacturer offers. Rules and amounts vary, so read the details.
Questions to ask the provider
Keep a short list handy when quotes come in.
- How did you choose this size?
- What brand and model is it, and what does the warranty cover?
- Does the price include removal, permits and startup?
- Are the indoor and outdoor parts both new?
- What could change the final price?
- How long will the job take?
Read the written quote line by line. A clear provider will not mind the questions.
Comparing quotes without pressure
Get at least two or three written quotes if you can. Line them up side by side. Compare the model, size, efficiency rating, what is included, and the warranty terms.
The middle quote is not always the right one. The right quote is the one you understand. You are never required to say yes to the first provider you speak with.
Timing a replacement
If your AC still works but is aging, you have an edge. You can plan the job in spring or fall, when providers may be less busy. Planning gives you time to compare. A rushed choice in a heat wave leaves less room to shop.
Request a callback to talk through your options with a local provider.
What's Included
Home Assessment
The provider checks your home's size, windows, ducts and old unit before suggesting a system that fits.
Unit Removal
The old system is taken out, and the pad or mounts are made ready.
New System Setup
The outdoor unit, indoor coil, lines, wiring and drain are connected and checked.
Testing and Walkthrough
The provider tests cooling, shows you the thermostat, and explains the warranty terms.
What Drives AC Replacement Cost
These are typical U.S. ranges. Real prices vary by home, brand, size and local labor rates. Treat them as a starting point and get a written quote before you decide.
| Item | Typical range | Notes |
|---|---|---|
| Central AC replacement | $5,000 – $12,000 | Varies by size, brand and efficiency |
| Heat pump system | $6,000 – $15,000 | Often cools and heats; cold-climate models cost more |
| Ductless mini-split | $3,000 – $8,000 | Price rises with the number of indoor heads |
| Outdoor unit only | $3,000 – $7,000 | Only works if the indoor coil matches |
| Ductwork repair or changes | $500 – $5,000 | Depends on how much needs sealing or replacing |
| Permits and disposal | $100 – $800 | Rules and fees differ by area |
How It Works
Share Your Situation
Tell us about your home and your current system, or request an estimate through the form.
Meet a Local Provider
A provider in our network looks at your home and measures what you need.
Compare Written Quotes
Check the model, size, extras and warranty. Ask what drives price.
Decide and Schedule
Pick the quote you understand, then set an install date with that provider.
Why Call Significantconcern Heating & Air
Written Quotes to Compare
Providers in our network put the details on paper so you can compare them side by side.
No Pressure
You choose your pace, and asking for an estimate carries no obligation.
Local Providers
Independent providers know area homes, from older frame houses to ranch layouts.
Plain Answers
Ask what drives price, and expect clear, simple answers in return.
Other Services
FAQ
AC Installation & Replacement Services FAQ
How do I know if I should replace my AC or repair it?
Consider the unit's age, how often it breaks, and what the repair costs. Ask providers for repair and replacement quotes in writing, then compare.
How long does an AC installation usually take?
Many installs take one day, though complex jobs with new ducts or a mini-split can take longer. The provider should give you a time estimate in the written quote.
Can I replace just the outdoor AC unit?
Sometimes, but the indoor coil must match it. A mismatch can hurt performance and efficiency, so ask the provider whether replacing both parts makes more sense for your home.
Contact Us
Request a callback
Tell us what your heating or cooling system is doing. We will pass it to independent local providers so you can compare options with no obligation.
No obligation