St. Charles, IL Navien Tankless Water Heaters

Get Your Estimate Today

Schedule Your Estimate Talk to an Expert

Doc's HVAC has been installing domestic water heating systems for DuPage County, IL homeowners and businesses for almost 20 years. If your existing hot water tank in Chicagoland is more than 8 - 10 years old, or if you starting a new project, a new efficient and reliable Navien® tankless water heater from the Riebe family at Doc's may be you best treatment.

If you've been suffering from not having enough water, the best treatment in a new Navien tankless water heater.
If your hot water heater is on life support call the Doc.
We can install a new system stat, with 24 /7 service available.
We will always diagnose your hot water needs, discuss the treatment options with you, and deliver a perfect outcome for water heating system.

Click the Navien logo to learn more about the boilers we carry.

Navien Tankless Water Heaters And Combi Boilers

Gas-fired tankless water heaters are becoming more popular throughout our service area in DuPage County, Illinois. We are proud Navien® tankless dealers, offering the latest high-efficiency models for residential and commercial applications.

NPE-A2

Ultra-Efficient Condensing Tankless Water Heater

Advanced ComfortFlow® recirculation system for instant hot water
Ultra-high efficiency (UEF up to 0.95)
Smart controls with Wi-Fi capability
Dual stainless steel heat exchangers

Schedule Your Estimate

NPE-S2

High-Efficiency Condensing Tankless Water Heater

Up to 0.97 UEF for maximum energy savings
Available in multiple capacities
Durable stainless steel heat exchanger
Compact design for easy installation

Schedule Your Estimate

NCB-H

Combi-Boiler for Hot Water & Heating

Delivers both space heating and domestic hot water
High-efficiency stainless steel dual heat exchangers
Advanced comfort control with smart features
Compact, wall-mounted design

Schedule Your Estimate

NFC-H

Premium High-Capacity Combi-Boiler

Highest capacity combi-boiler in its class
Exceptional energy efficiency with stainless steel heat exchanger
Smart temperature control for precise heating
Integrated NaviLink™ Wi-Fi for remote monitoring

Schedule Your Estimate

NFB-H

High-Efficiency Condensing Boiler

Whole-home heating solution with industry-leading efficiency
Durable stainless steel fire tube heat exchanger
Built-in cascade capability for multi-unit applications
Compact, space-saving design

Schedule Your Estimate

Feature	Tank Style Water Heater	Navien Tankless	What It Means To You
Efficiency	UEF: 0.60 or less	Up to 0.97 UEF	1/3 lower operating cost
First Hour Rate Rate	71 Gal.	300 Gal.	Much high hot water capacity
Recovery Rate	40 Gal.	300 Gal.	Never run out of hot water with tankless
Operating Control	Millivolt Control	Self Diagnostic	Safer and easier to service
Venting	Chimney	Direct Vent Sealed Combustion	Safer and more flexible
Floor Space Required	Aprox. 40 Sq. Ft.	0 - Wall Hung	Tankless requires no utility space
Equipment Life	8 - 12 Years	20+ Years	Better investment

Tankless Repair

Doc’s can also replace or install a new high-efficiency Navien Tankless Water Heater

Repair

Key Navien® Features Include:

Ultra condensing UEI efficiencies of up to 0.97 saving hundreds of dollar per year in most applications.
Venting:

2" PVC venting up to 75 feet for NPE models
3" x 5" concentric venting for NPN models

Stainless Steel heat exchangers resist corrosion better than typical copper

Dual stainless steel heat exchanger on NPE models
Single stainless steel heat exchanger on NPN models

All NPE model Navien® tankless models are EnergyStar Qualified.
NaviLink Wi-Fi remote control system gives you optional control anywhere you have internet access
They carry a up to a 15 year warranty in residential settings
NPE-A models feature ComfortFlow® built-in hot water recirculation. ComfortFlow® features an insulated buffer tank and recirculation pump. This provides virtually instant hot water delivery to your points of use, and sharply reduces potable water waste.

Schedule ac repair with Doc's HVAC Today

Tankless Water Heater Repairs

We offer tankless water heater repair service regardless of brand. Our licensed and factory trained service techs have the experience to help. For more information about tankless water heater repair and maintenance click here.

Replacement Tank Style Water Heaters

We offer complete gas or electric tank style water heater installation and repair services. Click here for more information.

If you want to know if a tankless water heater is the right treatment option for your St. Charles, IL area home or business contact the Doc. Our factory trained tankless technicians will evaluate you home and your hot water needs water to help you decide Navien® tankless is right for you.

Doc's is Family Owned:
Since 2002, Doc's HVAC has been owned and operated by Mike and Dana Riebe. Doc's is an active member of the St. Charles, IL area community.

Better Business Bureau:
Check out our five star reviews on our local BBB. We are more than proud of our A+ BBB rating!

Licensed and Insured:
We are licensed and insured heating and air conditioning contractors.

Voted #1 By Our Customers!:
Voted Best Heating and Air Conditioning in 2020 by readers of the Kane County Chronicle and the St. Charles Daily Herald!