Replacing an air conditioner is one of the bigger home investments you'll make — and in the northwest suburbs, where summers swing from mild to brutally humid, getting it right matters. Here's a straight-talking local guide to AC installation in Palatine and the surrounding towns.
What affects the cost of a new AC
There's no single price because every home is different. The biggest factors are:
- System size (tonnage) — bigger homes need more cooling capacity.
- Efficiency (SEER2 rating) — higher-efficiency units cost more upfront but lower your summer bills.
- Your existing ductwork — if ducts need sealing or modifying, that adds to the job.
- Matching the coil and furnace — a new AC performs best paired with a compatible coil and blower.
- Equipment brand and labor — quality gear and a proper install pay off for 15+ years.
Why correct sizing is everything
Bigger is not better. An oversized AC short-cycles — it cools fast but never runs long enough to pull humidity out of the air, leaving your home cold and clammy. An undersized unit runs nonstop and still can't keep up on the hottest July days. A good contractor performs a proper load calculation based on your home's square footage, insulation, windows and layout — not just a rule of thumb.
What to expect on install day
A standard AC replacement is usually a one-day job. We protect your floors, remove the old equipment, set the new condenser and coil, make the electrical and refrigerant connections, and fully test the system before we leave. You'll get a quick walkthrough of your new thermostat, too.
Repair or replace first?
If your current unit is over 12–15 years old, uses the old R-22 refrigerant, or needs a major repair like a compressor, replacement often makes more financial sense. We break the decision down in our guide on whether to repair or replace your AC.
Financing makes it easier
A new system shouldn't mean draining your savings. We offer financing on new installations so you can spread the cost into comfortable monthly payments.
Get an honest local estimate
Thermo Master installs high-efficiency furnace and AC systems across Palatine and the northwest suburbs with upfront pricing and no high-pressure sales. Request a free estimate and we'll help you choose the right system for your home and budget.