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❄️ Top 5 · 2026📍 Naperville, IL

The 5 best hvac contractors in Naperville.

Comfort should be boring.

Chosen by our review committee · Google ratings as of November 9, 2026 · Companies cannot pay to be listed

HVAC Contractors at work
1
Oncourse Heating, Cooling, Plumbing
★★★★★ 5.0 · 1,815 reviews

Heating and cooling is the biggest energy bill in most homes. The best HVAC contractors in Naperville size the system correctly, seal the ducts and keep it running with honest maintenance instead of pushing a new unit every visit.

  1. 1

    Oncourse Heating, Cooling, Plumbing

    🏆 Best hvac contractor in Naperville
    ★★★★★ 5.0· 1,815 Google reviews

    Every one of Oncourse Heating, Cooling, Plumbing's 1,815 Google reviews averages out to a flawless 5.0. That is one of the deepest review histories of any hvac contractor in the Naperville area. Based right in Naperville, it takes the top spot among hvac contractors in Naperville this year.

    📍 1415 Diehl Rd Ste 170, Naperville, IL 60563
  2. 2
    ★★★★★ 5.0· 720 Google reviews

    First Care Heating & Air holds a perfect 5.0 on Google across 720 reviews. That is one of the deepest review histories of any hvac contractor in the Naperville area. Based right in Naperville, it lands at #2 on our Naperville list.

    📍 1701 Quincy Ave, Naperville, IL 60540
  3. 3
    ★★★★★ 5.0· 426 Google reviews

    Every one of Deljo Heating, Cooling & Plumbing's 426 Google reviews averages out to a flawless 5.0. That many reviews is hard to fake and harder to keep that high. Based right in Naperville, it rounds out the top three for Naperville.

    📍 24125 111th St #600, Naperville, IL 60564
  4. 4
    ★★★★★ 5.0· 238 Google reviews

    A 5.0 Google rating with 238 reviews behind it puts Hall of Fame HVAC in rare company. That many reviews is hard to fake and harder to keep that high. Based right in Naperville, it rounds out the top four for Naperville.

    📍 10s187 Schoger Dr Unit 66, Naperville, IL 60564
  5. 5
    ★★★★★ 4.9· 12,417 Google reviews

    TR Miller Heating, Cooling, Plumbing and Electrical carries a near-perfect 4.9 Google rating from 12,417 reviews. That is one of the deepest review histories of any hvac contractor in the Naperville area. Based in Plainfield, it rounds out the top five for Naperville.

    📍 11917 S Aero Dr, Plainfield, IL 60585
How this list was made

Picked by people who read the reviews.

Our review committee researched hvac contractors serving Naperville and the surrounding area, read consumer reviews across the web, and settled on these five. We look at how many people have reviewed a company, what they say, and how the company holds up over time. We keep the full recipe to ourselves so it cannot be gamed. Google ratings shown are as of November 9, 2026. No company paid to be here, and none can. More on how we choose →

Before you sign

How to hire a hvac contractor in Naperville

1

Ask for a load calculation (Manual J) before any replacement, not a guess by square footage.

2

Compare SEER2 ratings and the warranty on the compressor, not just the sticker price.

3

Check that the company is licensed and that its technicians are NATE certified or equivalent.

4

A good tune-up includes refrigerant pressures, airflow and electrical checks, not a filter swap.

Good to know

HVAC Contractor questions, answered

How long does an air conditioner last?

About 12 to 15 years in hot climates with regular maintenance. Frequent repairs after year 10 usually mean replacement is the better buy.

Repair or replace?

A common rule: if the repair costs more than half the price of a new system and the unit is over 10 years old, replace it.

How often should filters be changed?

Every 1 to 3 months for standard 1-inch filters, more often with pets or allergies. Thicker media filters can go 6 to 12 months.

For the winners

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Paste this on your website. The badge is free and links back to this page so customers can check for themselves.

#1 HVAC Contractor in Naperville, IL 2026
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#2 HVAC Contractor in Naperville, IL 2026
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#3 HVAC Contractor in Naperville, IL 2026
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#4 HVAC Contractor in Naperville, IL 2026
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#5 HVAC Contractor in Naperville, IL 2026
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