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❄️ Top 5 · 2026📍 Waukesha, WI

The 5 best hvac contractors in Waukesha.

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
On Time Heating & Cooling
★★★★★ 5.0 · 511 reviews

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

  1. 1

    On Time Heating & Cooling

    🏆 Best hvac contractor in Waukesha
    ★★★★★ 5.0· 511 Google reviews

    Every one of On Time Heating & Cooling's 511 Google reviews averages out to a flawless 5.0. That is one of the deepest review histories of any hvac contractor in the Waukesha area. Based right in Waukesha, it takes the top spot among hvac contractors in Waukesha this year.

    📍 323 W Sunset Dr, Waukesha, WI 53189
  2. 2

    Heinrichs Home Comfort

    ★★★★★ 5.0· 431 Google reviews

    Every one of Heinrichs Home Comfort's 431 Google reviews averages out to a flawless 5.0. That many reviews is hard to fake and harder to keep that high. Based in New Berlin, it lands at #2 on our Waukesha list.

    📍 18445 W National Ave, New Berlin, WI 53146
  3. 3

    Absolute Comfort HVAC LLC

    ★★★★★ 5.0· 353 Google reviews

    Absolute Comfort HVAC LLC holds a perfect 5.0 on Google across 353 reviews. That many reviews is hard to fake and harder to keep that high. Based right in Waukesha, it rounds out the top three for Waukesha.

    📍 W220N1560 Jericho Ct #5, Waukesha, WI 53186
  4. 4

    Genesee Heating & Air Conditioning, LLC

    ★★★★★ 5.0· 245 Google reviews

    Every one of Genesee Heating & Air Conditioning, LLC's 245 Google reviews averages out to a flawless 5.0. That many reviews is hard to fake and harder to keep that high. Based in Mukwonago, it rounds out the top four for Waukesha.

    📍 S53W31165 Old Village Rd, Mukwonago, WI 53149
  5. 5

    Kettle Moraine Heating & Air Conditioning, LLC

    ★★★★★ 4.9· 5,024 Google reviews

    With 5,024 Google reviews averaging 4.9, Kettle Moraine Heating & Air Conditioning, LLC has earned its place here. That is one of the deepest review histories of any hvac contractor in the Waukesha area. Based in Delafield, it rounds out the top five for Waukesha.

    📍 W325S1767 Mickle Rd, Delafield, WI 53018
How this list was made

Picked by people who read the reviews.

Our review committee researched hvac contractors serving Waukesha 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 Waukesha

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.

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#3 HVAC Contractor in Waukesha, WI 2026
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#4 HVAC Contractor in Waukesha, WI 2026
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#5 HVAC Contractor in Waukesha, WI 2026
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