Furnace Installation Cost in Chicago, IL
Lennox 2.5-Ton 18 SEER

The average cost of furnace installation in Chicago, IL with a Lennox 2.5-ton 18 SEER system is $4,470, with most homeowners paying between $3,850 and $5,220 depending on home conditions, permit fees, and labor availability. The Lennox 2.5-ton unit is a premium, energy-efficient unit engineered for long-term reliability, sized for homes with 900-1,200 sq ft of conditioned space. The 18 SEER rating places this unit well above the minimum efficiency standard, reducing annual energy costs significantly.

Cost Breakdown — Chicago, IL

* Estimates based on Chicago area labor rates ($122.5/hr avg). Actual costs vary by home conditions and contractor. Get 3 quotes.

About Furnace Installation

Complete replacement or new installation of a gas or electric furnace including ductwork connections, venting, gas line, and thermostat. In Chicago, IL, licensed HVAC contractors typically charge $122–$141 per hour for installation labor, with this job averaging 6.3 hours.

The equipment cost for the Lennox 2.5-ton 18 SEER system represents approximately $2,680 of your total. Installation labor in Chicago adds $1,120, with permit fees, refrigerant, and disposal bringing the full estimate to $4,470. Prices in IL vary by contractor — always collect 3 quotes before scheduling a major HVAC installation.

Signs You Need Furnace Installation

Consider scheduling furnace installation in Chicago, IL if you notice furnace over 15-20 years old or frequent costly repairs or uneven heating room to room. Early action prevents the costly emergency service premiums common in the Midwest region during peak seasons.

• ✓Furnace over 15-20 years old
• ✓Frequent costly repairs
• ✓Uneven heating room to room
• ✓Rising heating bills despite mild weather
• ✓Yellow or flickering burner flame

What's Included

• ✓Remove and haul away old furnace
• ✓Install new furnace unit
• ✓Connect to existing ductwork
• ✓Gas line or electrical connections
• ✓Flue and venting installation
• ✓Thermostat setup and testing

Hiring an HVAC Contractor in Chicago

• 1.Verify the contractor holds a current IL HVAC license and carries liability insurance.
• 2.Request an itemized quote that separates equipment, labor, and permit costs.
• 3.Ask specifically about Lennox dealer status — authorized dealers in Chicago, IL often offer extended warranties.
• 4.Confirm the quote includes refrigerant, line set, and startup commissioning — not just the equipment.
• 5.Check for manufacturer rebates and utility company incentives before signing.

Frequently Asked Questions