When you hire Paragon Mechanical for your tankless water heater installation, you are hiring a team of experts to provide you with a top rated installation which will last for many years to come, problem free. Our extensive experience servicing existing tankless installations in the Chicagoland area, combined with our ongoing tankless water heater education, is what makes us a great fit for your new tankless water heater installation, service, and maintenance. Our exceptional installation team is always ready and eager to conduct their next tankless water heater installation. Our installers love the work they do and it truly shows in all of their installations. Having installed thousands of tankless water heaters every year, our installation technicians have the experience and knowledge to get your system installed correctly, efficiently, and safely every time. Tankless water heaters are what we do and we love installing tankless water heaters for our many Chicagoland customers.

If you’re looking for tankless water heater installation for your residence or commercial facility in or near the city of Chicago, call Paragon. Our expert technicians have over 30 years of experience installing, maintaining, and repairing tankless water heaters for both residential and commercial uses. Our qualified specialists have the technical skills and the knowledge that only comes with years of on-the-job experience. We are professionals with a purpose: we will get your tankless water heater up and running in no time.

Tankless Installations Are NOT Created Equal.


We know your newly installed tankless water heater is a large investment and we treat it as such. Your family's comfort is not a responsibility we take lightly. In addition to guaranteeing your tankless water heater will be installed to specification, we offer warranties on all of our tankless water heater installations for up to 10 Years. You can rest assured knowing you chose the right team to install your new tankless water heater.


Researching new tankless water heaters can be a very stressful and confusing process for a homeowner to undertake. Instead, we urge you to allow Paragon Mechanical to eliminate the guesswork as you focus on the things that matter most to you.

  • Tankless Installation Checklist +

    Tankless Size

    The first thing to know in having a tankless heater installed is to determine the size tankless heater or tankless heaters you need for your home. This step is important and will generally be decided by the number and style of showers that the home owner would like to have able to run at the same time. Tankless heaters are sized in gallon per minute (GPM) rather then gallons per hour so the sizing is based on more any given moment or simultaneous shower. In certain applications it is necessary to have more than one heater installed to meet the customers needs.


    Venting is one of the most critical points on tankless heater installation. Once you know the size and how many you can determine the venting by understanding the specifications of the tankless heater or tankless heaters which you have sized the job for. Two things are a must on every properly installed tankless heater; the first is that all tankless heaters require outside air for combustion intake and second all exhaust must be properly sized according to the manufacturer specification.

    Gas Piping

    The second most common short cut taken on tankless heater installation’s is not sizing the gas pipe correctly. This is typically the most physically demanding parts of a tankless heater installation however this is also critical for the tankless heater to operate correctly on high fire situations. You will find that on all our tankless installations the project manager and field installer will both alike review and make sure that the gas piping for the tankless heater is sized correctly and that your gas meter is also sized properly.

    Return or No Return

    In larger homes it is common that have more than 30 linear feet of plumbing pipe will benefit from a return system if there is not already a return system. A return system is a system that will provide “instant” hot water for those larger homes which the water heater is fair away from the points of use. In retro-fit application’s a return system can be installed in one of the following three ways; First if there is an existing return line then we can retro fit a proprietary return system which will respond exactly the way the existing return system was if not better. The second way would be to actually install a return line if access is available to do this then we could install the return system and you will have “instant” hot water to all points of use. The third is a unique system that utilizes the cold line to create a return system. The only downfall to this system is that the cold water at certain points will be wamer when first opened. The upside is that you will have hot water instantly and without having to open walls or run a dedicated return line.

  • Top Rated Tankless Manufacturers +

    Noritz Tankless Water Heaters

    Noritz Tankless Water Heater

    Takagi Tankless Water Heaters

    Takagi Tankless Water Heater

    AO Smith Tankless Water Heaters

    AO Smith Tankless Water Heater

    Rinnai Tankless Water Heaters

    Rinnai Tankless Water Heater

    Navien Tankless Water Heaters

    Navien Tankless Water Heater

    Eternal Tankless Water Heaters

    Eternal Tankless Water Heater

    State Tankless Water Heaters

    State Tankless Water Heater

    Bradford White Tankless Water Heaters

    Bradford White Tankless Water Heater

    Rheem Tankless Water Heaters

    Rheem Tankless Water Heater

    Intellihot Tankless Water Heaters

    Intellihot Tankless Water Heater
  • Tankless Training & Experience +

    Tankless Installations Completed

    Tanklesss Training and Experience

    Repeat Tankless Customers
  • Dispatch Locations +

    Chicago, IL

    River North • The Loop
    South Loop • Old Town
    Wicker Park • Bucktown
    Gold Coast • Lakeview
    Lincoln Park • Magnificent Mile
    Ukranian Village • West Town

    Arlington Heights, IL

    60004 • 60005

    Elmhurst, IL


    Glencoe, IL


    Highland Park, IL


    Lake Forest, IL


    Naperville, IL

    60540 • 60563 • 60564
    60565 • 60566 • 60567

    Wilmette, IL


    Winnetka, IL

  • Tankless Customer Experiences +

    "Scott and Dave came and installed my new Noritz tankless heater and were very clean and neat to the t"

    Jack M.
    Arlington Heights, IL

    "I love my new tankless heater thank you Paragon"

    Mickey H.
    Northbrook, IL

    "I originally had an eternal tankless installed by another company and when it failed for the third time I found Paragon Mechanical and Doug came and installed my new Noritz tankless heater. I am so happy with my experience thus far and look forward to many years with my new tankless heater."

    Chris Z.
    Hoffman Estates, IL

    "I have never been so happy with a contracting company; they were on-time, very clean and neat and delivered everything that was promised."

    John D.
    Itasca, IL

    "Doug did a great job installing my tankless heater and informed me of everything along the way. He is a great installer and did an awesome job."

    Mike R.
    Arlington Heights, IL

    "I had to replace my tankless heater after only 2 year because the previous company installed it wrong. Scott did a great job and though it was the same product you could see th ediffernece between the previous company and Scott’s craftsmen ship."

    Nick W.
    Northbrook, IL

    "I had a great experience dealing with Paragon and there installation team. I interviewed several companies and am suresure that choosing Paragon for installing my tankless heater was the correct choice."

    Jim P.
    Deerfield, IL

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