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Wall Water Heater


Does your Tankless Water Heater need repair? We offer around the clock water heater repair service!

Tankless water heaters have become increasingly popular in Cook County, IL. Many area companies install tankless water heaters but very few have experience and depth of service experience for tankless water heater applications in area homes and businesses that comes from Ultimate HVAC!

Click the Navien logo below to learn more about the Tankless Water Heaters we carry.

Image by Chandler Cruttenden

Ultimate HVAC offers emergency service for all brand and models of tankless water heaters including Rinnai, Navien, Bosch, Noritz, Rheem and more. Tankless water heaters are technically advanced. Properly servicing tankless water heaters, regardless of brand, require extensive training, parts support, and years of experience. Tankless water heater service problems include:

  • Scale build-up: Causing reduced water flow, efficiency, and capacity

  • Inlet Water Filters Inlet water filters can become obstructed reducing water pressure and water flow'

  • Improper Venting: Block or obstructed air inlet or venting typically caused by heavy snow or improper installation

  • Gas Supply: Intermittent flame failures cause by gas pressure problems

  • Condensate Issues: Higher efficiency tankless units produce condensation. This water needs to be removed from the unit and system venting properly

  • Changes in Hot Water Quality: Changes wait times for hot water or fluctuating outlet water temperatures

  • Noise: Tankless water heaters are usually quiet. New noises or louder operation would indicate a service issue.

With our years of experience at Ultimate HVAC we know how great a properly installed and serviced tankless water heater can be. Almost all problems with tankless water heaters (or other modern HVAC equipment) are caused by improper installation, poor water quality, or improper maintenance. Take advantage of our expertise to help you enjoy many years of great tankless performance.

If you considering a new tankless water heater let us know. We'll help you determine if a new tankless system is right for you.

Conventional and Tankless Water Heater Installations

Ultimate HVAC offers service and installation for traditional water heaters. Click here for more information.

For more information about our tankless water heater installation services featuring Navien®, click here.

Heater Maintenance



Ultimate HVAC is local owned and has decades of experience providing water heater installation and service for Skokie area homeowners and businesses.

 Guarantee Peace of Mind

Ultimate HVAC is committed to your needs and satisfaction regarding water heating, HVAC or indoor air quality.

We've been an Accredited Better Business Bureau member since 2017, and we are more than proud of our A+ BBB rating!

Nate Certified heating and cooling contractor.

Ultimate HVAC is EPA refrigeration and air conditioning certified.

Ultimate HVAC is licensed and insured to do furnace, boiler, air conditioning, and water heating work throughout Cook County.

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