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    Residential HVAC

    Residential A/C Installation and Repair

    Available in Spencer and Rapid City
    Need a Hand?
    24/7 Emergency Service

    It always happens at the worst possible moment…

    • The air conditioner that stops working during the hottest week of summer.
    • Strange sounds and warm air when you desperately need cool comfort.
    • Energy bills that soar because your aging system struggles to keep up.

    And suddenly, your comfortable home becomes unbearably hot when your family needs relief most.

    When Summer Heat Strikes, We Bring the Cool Relief

    Since 1983, Midwestern Mechanical has rescued thousands of families from sweltering summers across Rapid City and Spencer. Our certified HVAC technicians arrive when others won’t—holidays, weekends, middle of the night—because we understand that cooling failures can’t wait until “business hours.”

    Help is on the way.

    The Midwestern Mechanical Promise

    When your family’s cooling system fails, you shouldn’t have to worry about finding reliable contractors or enduring the heat. That’s why homeowners across our communities trust us to restore their cool comfort quickly.

    Here’s how simple we make it:

    1. Call anytime, day or night.
    2. Our friendly dispatcher sends the nearest expert.
    3. You get upfront pricing before any work begins.
    4. We solve your problem and restore your peace of mind.
    5. You get back to your life (with an A/C system that actually keeps up).

    When the A/C goes out, nobody’s happy. Let’s change that.

    See our simple
    5-step process

    Right Where You Need Us

    Our strategically located hubs in Rapid City and Spencer mean your home gets:

    • Same-Day Service: Usually within 60 minutes for emergencies
    • Upfront, no-surprise pricing: Know the cost before we start
    • Lifetime workmanship warranty: If it’s not fixed right, we’ll make it right
    • Clean technicians who respect your home: We’ll leave your space cleaner than we found it

    SIOUX FALLS, SD

    HEADQUARTERS

    4105 N Lewis Ave, Sioux Falls, SD 57104
    Click markers to view other locations

    Your Home Cooling Specialists

    Is your air conditioner blowing warm air instead of cool relief? Hearing unusual noises from your AC unit? Noticing some rooms stay warmer than others?

    Our residential air conditioning specialists understand that reliable cooling is essential for your family’s comfort during hot summer months. We work with all major AC brands and can diagnose any problem, or help you choose the perfect replacement that efficiently cools your entire home.

    Real Talk from Real People

    Whether it's grateful families recommending us to friends or our employee-owners who've been with us for decades, the people who know us best understand what sets us apart.

    • "Our manufacturing facility's sump pump system failed during a weekend storm, and water started flooding our equipment storage area. Midwestern Mechanical responded immediately, even on Sunday night. They pumped out the water, installed a new high-capacity commercial system with dual pumps and battery backup, and completed everything before our Monday shift. Their commercial expertise saved us thousands in potential equipment damage and production delays."

      - Facility Manager, Spencer
      ★★★★★

    • "We truly appreciate Midwestern Mechanical and consider their contribution to our project invaluable. Their can-do attitude and ability to communicate with all team members are far too uncommon in today's industry."

      - Mark P., Hospital Project Manager
      ★★★★★

    • "The service and care we received from Midwestern Mechanical was excellent! Our home is large and over 100 years old, which can pose challenges for plumbing repairs. Our technician Jamie is knowledgeable, friendly and efficient."

      - Linda H., Local Customer
      ★★★★★

    • "Midwestern Mechanical's BIM modeling capabilities saved our hospital project significant time and money. Their virtual construction coordination identified and resolved conflicts before we reached the field, and their fire protection design expertise ensured we met all healthcare facility requirements. The entire process was seamless from design through completion."

      - David P., Project Manager, Rapid City
      ★★★★★

    • "When our water heater died on a Sunday morning with three kids needing baths, they were at our house within an hour. The technician explained everything clearly and had us back up and running the same day. Being employee-owned really shows—they care about our family like their own."

      - Amanda J., Sioux Falls
      ★★★★★
    "When your family needs cool comfort,
    trust the cooling experts who deliver."
    24/7 Emergency Service

    Got Questions? We've Got Answers.

    From unexpected cooling emergencies to planned system replacements, we’re here to help you understand your home’s air conditioning options. Here are some of the most common questions we hear from families in our communities.

    Need a Hand?

    We've got you. For everyday service or a big project, hit the button below and we'll get the ball rolling.

    Get a Quote

    Emergency Services

    Need help right now? Our crew's on call 24/7—just tap the button below and we'll be on our way.

    Call Now