FeaturedHVAC Companies in Sioux City, Iowa

Kalins Indoor Comfort

Top Spot in Sioux City Today 4.90 (2,834 reviews)(712) 252-2000

Kalins Indoor Comfort

Kalins Indoor Comfort is a heating and air conditioning company based in Sioux City, serving Iowa, South Dakota, and Nebraska. Its roots date to 1921.

Last Updated September 28, 2026.

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Business Highlights

Kalins says it has been a Lennox Premier Dealer for over 70 years.
Kalins says it has received the Lennox Circle of Excellence Award five times.
Kalins describes itself as Sioux City’s longest continuously operating heating and air conditioning firm.

Service Area

Iowa, South Dakota, and Nebraska; Sioux City, Vermillion, and Yankton.

Featured Local Business

Kalins Indoor Comfort is one of 11 HVAC companies ProsGrade lists in Sioux City, Iowa.

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Featured on ProsGrade

Listing details

10 services listed, including Heating, Air conditioning and Heat pumps. Open 24 hours, 7 days a week. Rated 4.9 from 2,834 reviews.

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How This Business Compares

How Kalins Indoor Comfort compares with the other 10 HVAC companies on ProsGrade in Sioux City, using public Google ratings and review counts.

Ranks in the top 10% of Sioux City HVAC companies on ProsGrade by Google rating and review volume.
Rated 4.9 on Google, at or above the 4.6 average of other Sioux City HVAC companies on ProsGrade.
Has the most Google reviews (2,834) of the 11 Sioux City HVAC companies on ProsGrade.
One of 5 Sioux City HVAC companies on ProsGrade rated 4.7 or higher from at least 10 reviews.

Trust Signals

Phones answered 24/7; call for urgent HVAC help.

Services Covered

10 services

HeatingRepair, installation, and maintenance.
Air conditioningRepair, installation, and maintenance.
Heat pumpsRepairs, installation, replacement, and maintenance tune-ups.
Aeroseal duct sealingPatented sealing technology that seals ducts airtight.
Commercial HVACRetrofits, full or partial replacements, ground-up installations, and maintenance plans.
DuctworkRepair and replacement.
FireplacesRepair, installation, and maintenance for gas and electric models.
Indoor air qualityTesting, air filters, and air purifiers.
Geothermal systemsInstallation and maintenance.
Water heater installation

Reviews

What customers say

Customers praise friendly, professional service and clear explanations. One water-heater customer noted that the work area was left cleaner, everything was leak-tested, and a device was installed to alert the household to water leaks. Another customer appreciated the quick response and recommendations for home heating and cooling.

Customer Reviews

Amy Prato

Rick N. was so knowledgeable and helpful with the thermostat! He made my day pointing out all the cool settings and gadgets we bought with our system! Anthony P was very professional and such a hard worker. And Jordan was a hoot to work with... It was a rollar coaster of emotions having to get a whole new system, but Jeremy walked us through it all. We are very happy and recommend Kahills if you want a job well done and polite, professional service!

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Eliza

Great easy experience, fast and efficient, quick response time. Bill Kammerer was nice, friendly, and funny. He addressed all our concerns and provided recommendations on how we can better heat and cool our home. Thanks Bill! Updating review to add that we also worked with Evan Green and Nick McCabe - Excellent service all around! Great guys!

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Alyssa Reinert

We had a great experience with our new water heater installation. The team was friendly, respectful, and easy to work with. They even asked ahead of time if they could bring a couple extra people along for training, which I thought was really great to see. Jeremy V. and Jeremy S. did a great job explaining to those training. Brady, Mikah, and Ivan left the area cleaner than when they started, carefully leak-tested everything, and installed a device that will alert me if there’s ever a water leak — which gives me a lot of peace of mind. They also took the time to explain how everything works and made sure I understood it all before they left. Overall a really positive experience and great service. I’d definitely recommend them to anyone!

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Sideout34

Based just off of the installation process. It was smooth and easy. Danny was very courteous and professional. Now if everything works great it will truly be a five star review. TBD

Michael Morse

KALINS were phenomenal! They came out and gave me a quote and diagnosed my furnace issue with grace and professionalism. The technician was nice, helpful and knowledgeable about the issues I am having. They gave me a quote, as well as a couple other suggestions. He was at my house for 90 minutes and did a great job!

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