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If your traditional water heater can't keep up with your household's demand—or you're ready to upgrade to a more efficient and space-saving solution—RJ's Heating, Cooling & Water Heaters has you covered. We specialize in tankless water heater installation and replacement in Barrington, IL, offering high-performance systems from State and Navien designed to deliver hot water on demand, reduce energy use, and provide long-term savings.
Tankless water heaters are a smart investment for homeowners who want unlimited hot water, lower utility bills, and a system that takes up less space and lasts longer than a conventional tank unit. Whether you're building a new home or replacing an outdated water heater, our licensed technicians will help you choose the right tankless model, install it to manufacturer standards, and ensure it performs reliably from day one.
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A tankless (on-demand) water heater heats water only when you need it, rather than storing it in a large tank. When you turn on a hot water tap, cold water flows through a heat exchanger in the unit and is quickly brought up to temperature using gas or electric power.
Unlike tank systems that heat water 24/7, tankless units only use energy when there's a demand, which means lower utility bills, fewer standby losses, and endless hot water—even for back-to-back showers.
Tankless water heaters are rapidly becoming the preferred choice for modern homes. Here's why:
At RJ's, we make the installation process smooth and stress-free. We handle everything from equipment selection to permits and final testing—ensuring your system is fully functional and compliant with local code.
Whether you're converting from a tank to a tankless unit or simply replacing an aging system, RJ's provides clean, professional work with minimal disruption to your home.
We install top-quality systems from Navien and State—brands known for innovation, performance, and long-lasting reliability.
Not sure which brand is best for your home? We'll help you compare efficiency ratings, flow capacity, installation requirements, and price points.
At RJ's Heating, Cooling & Water Heaters, we believe that quality HVAC services should be affordable for every homeowner and business. That's why we offer flexible financing options to help you invest in new heating, cooling, or water heating systems without financial stress.
Whether you need a new furnace, air conditioner, or water heater, our trusted financing partners make it easy to spread out payments over time. Contact us today to learn more about your financing options in Barrington, IL!
Apply NowTank water heaters typically last 8–12 years. If your current system is near or beyond that age, or showing signs of failure, now is a great time to upgrade.
A tankless upgrade can resolve these issues while improving comfort and reducing your energy costs.
In most cases—yes. Tankless water heaters work well in both single-family homes and multi-family dwellings, especially when installed by a team that understands sizing, venting, and fuel requirements.
If you're unsure, RJ's will inspect your current plumbing setup and walk you through the pros, cons, and potential savings of switching to tankless.
While tankless systems require less day-to-day attention than traditional heaters, annual maintenance helps ensure peak performance.
RJ's offers tankless water heater maintenance services in Barrington, IL, and can schedule annual reminders to keep your system in excellent condition.
Tankless water heaters qualify for a variety of rebates, utility incentives, and federal tax credits. As of 2025, qualifying ENERGY STAR® models may be eligible for:
RJ's will help you determine which programs you qualify for and ensure all paperwork is submitted properly to maximize your savings.
RJ's Heating, Cooling & Water Heaters proudly serves homeowners throughout:
We understand local plumbing codes, gas utility requirements, and water quality conditions—so we can recommend systems that make sense for your home, your usage, and your long-term comfort.
Prevent costly breakdowns and keep your HVAC system running at peak efficiency year-round with our Comfort Club Maintenance Plan. Routine HVAC maintenance improves energy efficiency, extends system lifespan, and prevents unexpected failures. Regular maintenance saves you money on energy bills and prevents costly emergency repairs. Sign up today and enjoy worry-free heating and cooling throughout the Chicagoland area!
Join Our Comfort Club Comfort Club DetailsSeasonal HVAC tune-ups to ensure optimal performance.
Priority service—jump to the front of the line for repairs.
Exclusive discounts on repairs and system replacements.
Extended equipment lifespan through regular maintenance.
Furnace and AC inspections & tune-ups
Ductwork and air filter checks
Refrigerant level and thermostat calibration
Water heater efficiency checks
At RJ's Heating, Cooling & Water Heaters, we are:
As a family-owned HVAC company with over 20 years of experience, we proudly serve Barrington and Northwest Chicago. As an Armstrong Pro and Aprilaire Partner, we deliver trusted, high-quality comfort solutions.
We offer 24/7 emergency service for HVAC and water heaters, upfront pricing with no surprises, and highly rated craftsmanship trusted by home and businessowners throughout the region.
We proudly install and service trusted brands like Armstrong, Ducane, MagicPak, Daikin, Burnham, Weil-McLain, Aprilaire, Reme Halo, and State Water Heaters—ensuring lasting performance and comfort you can rely on.
We proudly serve Barrington, IL, and Northwest Chicago, covering areas such as:
A tankless (or on-demand) water heater heats water only when you turn on a faucet or appliance. Cold water flows through a heat exchanger, which rapidly warms it using either natural gas or electricity. There's no storage tank—so hot water is available instantly and continuously without the standby losses of traditional tank models.
The cost varies depending on the size, brand, and whether you're replacing a tank unit or upgrading in new construction. In Barrington, IL, a complete installation typically ranges from $3,000 to $5,500, including labor, venting upgrades, and plumbing adjustments. Higher-efficiency condensing units or complex retrofits may increase costs.
Both brands are trusted in the industry, but they cater to slightly different needs:
We'll help you compare flow rates, warranty terms, and available features to find the right fit.
Yes—in most cases, you can retrofit a tankless unit where your old tank heater was installed. This often involves upgrading gas lines, venting, and possibly electrical components. RJ's handles all necessary modifications and permitting to ensure a safe, code-compliant installation.
Not unless the system is undersized. Tankless units provide unlimited hot water—but they do have flow rate limits. If you run multiple showers and appliances simultaneously, we'll size the unit accordingly or recommend a cascading system to meet high demand.
With proper maintenance, tankless systems typically last 15–20 years, compared to 8–12 years for tank models. Navien and State units are built for durability and offer strong manufacturer warranties—some up to 15 years on heat exchangers.
Yes. Because they heat water only when needed, tankless systems eliminate standby losses and operate at efficiencies of 90–98% (for condensing models). Most homeowners in Barrington notice a 15–30% reduction in energy costs after switching.
Annual maintenance is recommended and includes:
RJ's offers scheduled maintenance plans to keep your system running smoothly and protect your warranty.
Yes. Hard water can lead to mineral buildup in the heat exchanger, reducing efficiency and lifespan. If your home has hard water, we may recommend a water softener or scale reduction system alongside your tankless unit.
Most tankless installations are completed in one day. This includes removal of your old system, installing the new unit, updating venting or gas lines, and testing. In retrofit scenarios, additional time may be needed for permitting or inspections.
Yes—even gas-powered units use electricity for ignition, control boards, and sensors. If you're concerned about outages, we can recommend battery backups or standby generators to maintain hot water during power loss.
Yes, outdoor models are available and can be mounted on exterior walls. They're ideal for homes with limited indoor mechanical space. Outdoor units include weatherproof enclosures and built-in freeze protection for cold climates like Barrington.
Yes. Many ENERGY STAR® certified models qualify for:
RJ's will help you submit rebate forms and verify your eligibility based on the installed model.
Yes. Most models include precise temperature control and anti-scald features. You can set the output temp (typically 120°F), preventing burns and maintaining safe hot water delivery throughout your home.
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If you're tired of running out of hot water, frustrated with high utility bills, or looking to modernize your home's water heating system, a tankless upgrade is the solution you've been waiting for. At RJ's Heating, Cooling & Water Heaters, we specialize in tankless water heater installation and replacement in Barrington, IL, helping homeowners enjoy dependable, on-demand hot water with greater energy efficiency and fewer headaches.
Whether you're replacing an outdated tank system or choosing tankless for a new build, our licensed experts make the process seamless. We'll help you select the right system based on your home's size, plumbing, and hot water demands. From trusted brands like Navien and State, we install high-efficiency models that are compact, powerful, and built to last up to 20 years with proper care.
Our team handles everything—from safe removal of your old water heater to installing upgraded gas lines, venting, and digital controls. We also walk you through rebate eligibility, warranty registration, and routine maintenance requirements to maximize your investment and system life.
We proudly serve Barrington, IL and surrounding areas including Schaumburg, Hoffman Estates, Palatine, Oak Park, Park Ridge, and beyond. Local homeowners trust RJ's for expert craftsmanship, transparent pricing, and long-term performance.
Don't settle for lukewarm water, leaking tanks, or rising energy bills. Contact RJ's Heating, Cooling & Water Heaters today to schedule your tankless water heater installation in Barrington, IL. Let's get started—and bring instant, endless hot water to your home.
872-274-4502 Schedule Today
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