Every spring, homeowners across New Lenox and Will County face the same question: is it time to invest in central air, or is a window unit good enough? Here's an honest comparison to help you decide.

The Cost Comparison

Window AC: $150–$600 per unit. A typical New Lenox home might need 3–5 window units to cool the whole house, totaling $500–$2,000. Each unit also costs $50–$150 per season to operate.

Central Air: $3,500–$7,500 installed for a home with existing ductwork. Higher upfront cost, but one system cools the entire home, and modern high-efficiency systems cost significantly less to operate than multiple window units.

Comfort and Humidity Control

This is where central air wins decisively in Illinois. Our summers aren't just hot — they're humid. Central air systems are sized to handle both temperature and humidity for the entire home. Window units cool individual rooms but leave hallways, bathrooms, and bedrooms without units hot and humid. Illinois humidity is genuinely uncomfortable and can cause mold issues in uncooled spaces.

Home Value

Central air conditioning adds $5,000–$15,000 to home value in the New Lenox market. Homes without central air are harder to sell and often sell for less. Window units add no value and are typically removed when you move.

Noise and Aesthetics

Window units are loud, block natural light, and require installation and removal each season. Central air is quiet, invisible, and runs year-round without any seasonal setup.

The Verdict for Illinois Homeowners

If you plan to stay in your home for more than 3–5 years and your home has existing ductwork, central air almost always makes financial sense in Illinois. The comfort improvement is significant, the home value increase is real, and the operating costs are often lower than multiple window units. New Lenox Heating provides free in-home estimates with no pressure. Call 815-893-3642 to schedule.

Frequently Asked Questions

Is central air worth it in Illinois?

Yes, for most Illinois homeowners central air is worth the investment. Illinois has 4–5 months of genuine cooling season with temperatures regularly above 90°F. Central air provides whole-home comfort, better humidity control, and increases home value by $5,000–$15,000 on average. New Lenox Heating installs central AC systems starting around $3,500. Call 815-893-3642 for a free estimate.

How much does it cost to add central air to a house without it?

Adding central air to a home that already has forced-air heating (a furnace with ductwork) typically costs $3,500–$5,500 for the AC unit and installation. If ductwork needs to be added, costs range from $8,000–$15,000. New Lenox Heating provides free in-home estimates. Call 815-893-3642.

Can I add central AC to my home without ductwork?

Yes — a ductless mini-split system provides central-air-quality cooling without ductwork. These systems are more expensive upfront ($3,000–$5,000 per zone) but are highly efficient and ideal for older homes, additions, or rooms that are difficult to cool. New Lenox Heating installs ductless mini-split systems throughout Will County.