Tankless Water Heater Installation in the Northwest & West Suburbs
Pure Comfort installs Navien NPE-240S2 and NPE-240A2 condensing tankless water heaters sized to your household’s real hot-water demand. Tankless units provide continuous hot water and typically last 15 to 20 years with yearly descaling. Estimates are free, and we handle gas line sizing, PVC venting, condensate drainage and the water connections.
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Tankless Water Heater Pricing
| Water heater | Typical installed price |
|---|---|
| Tankless | $4,500 – $6,500 |
What moves the price
- Replacing an existing tankless, or mounting a new unit on the wall
- Repiping
- New venting
- Gas piping
- Brand
- New ¾" main shut-off valve
- Copper or galvanized water lines
What every tankless installation includes
- Removal and proper disposal of the old water heater
- New Navien condensing tankless water heater mounted on the wall near the existing water heater location
- Hot and cold water piping modified and rerouted to the new unit
- Navien-compatible hot and cold service/isolation valve kit for future flushing and maintenance
- Pressure relief valve with discharge piping routed toward the floor
- Gas piping modified and rerouted to the new unit, with corroded piping replaced when needed
- New gas shut-off valve, union, drip leg/sediment trap and fittings as required
- New PVC combustion exhaust and vent piping terminated through an exterior wall
- Condensate drain piping to a floor drain
- Electrical connection to a nearby receptacle
- Startup and commissioning of the new tankless water heater
- Leak test of all water and gas connections and verification of proper operation
- Work area cleaned and installation debris removed
Warranty
- 15-year limited heat exchanger warranty from Navien
- 5-year limited parts warranty from Navien
- 1-year labor warranty from Pure Comfort Heating & Cooling
Manufacturer warranty is subject to Navien’s terms, conditions and registration requirements.
Typical installed prices in our service area. You get a written price before any work starts.
No Hot Water?
Fast, honest water heater repair from a family-owned Streamwood team.
- $75 diagnostic ($99 evenings, weekends & holidays)
- 24/7 emergency service, with same-day appointments available
- Most tank water heater repairs cost $150 to $700
- Upfront, flat-rate pricing before any work starts
Need a Replacement Water Heater?
Free in-home estimates with a written price before any work starts.
- 40- and 50-gallon Bradford White tanks in stock for fast replacement
- Power-vent and Navien tankless options
- Removal and haul-away of the old water heater included
- Financing available on projects over $2,000
Is a Tankless Water Heater Right for Your Household?
A tankless water heater is a good fit for households that want endless hot water and more floor space, as long as the gas line and venting can support it. Tankless equipment heats water as it is needed, but it is not unlimited in every situation. These are the factors that decide it.
- Peak simultaneous demandEach unit has a maximum flow rate, so showers, fixtures and appliances running at once must be accounted for.
- Incoming water temperatureThe colder the supply water, the more the unit has to raise it, which reduces the flow it can deliver.
- Gas or electrical capacityTankless units often need more input than a storage tank, so the existing supply has to be verified.
- Venting requirementsVent material, route and termination differ from a conventional tank and shape the project scope.
- Available spaceTankless equipment frees up floor area, but it still needs clearances, drainage and service access.
- Maintenance expectationsWater quality and manufacturer guidance affect flushing and service needs over the life of the equipment.
Fuel supply, venting, electrical power, water quality and maintenance all affect the recommendation. Pure Comfort compares the full project rather than pricing only the appliance.
How Do We Design and Install a Tankless System?
We design a tankless system around your peak hot-water use, then size the gas line, venting and water connections to match. The goal is dependable hot water under the household’s actual use pattern, not a generic promise of endless supply.
- Estimate peak flow. We calculate how much hot water the home needs at once and how much the incoming water must be heated.
- Verify the utilities. Gas or electrical capacity, venting, drainage, water lines and equipment location are all checked before selecting a unit.
- Complete the installation. Our in-house team handles the utility, vent and water connections required for the selected model.
- Start up and walk through. Startup confirms combustion or electrical operation, flow, temperature control, condensate handling and leak-free connections, then we cover controls, service isolation and maintenance.
Should You Keep Your Tank or Switch to Tankless?
Keep your tank if it works and you want the lowest cost; switch to tankless for endless hot water, saved space and a 15-year heat exchanger warranty, at $4,500 to $6,500 installed as of October 2026. The conversion may require gas-line, venting, electrical, water-line or drainage changes, so we compare the full project.
A straightforward replacement project
Replacing a failed tank with another storage unit is usually the simpler and less expensive path when the existing setup supports it.
Space, flow and operating goals align
When the household’s priorities match what tankless does well, and the utilities support it, the conversion can be worth the added scope.
THE FOUR THINGS WE WEIGH
The full project, not the appliance
Gas, venting, electrical and water-line changes are part of the real comparison.
Peak simultaneous flow
How many fixtures may run together and what temperature rise is required.
What the home can supply
Whether gas input, pressure and electrical service meet the unit’s requirements.
Long-term expectations
Water quality and manufacturer guidance affect flushing intervals and warranty conditions.
Related options: Standard Tank Water Heaters · Power-Vent Water Heaters
Tankless Planning Based on Real Conditions
Pure Comfort has served Streamwood since 2008, building on Gene’s early experience with water heaters and boilers. Our project library includes completed tankless installations in local homes.
- Demand calculated firstWe size around actual simultaneous use rather than a general household headcount.
- Utilities verifiedGas input, pressure, electrical supply and venting are confirmed before equipment is selected.
- In-house installersOur own crews complete the utility, vent and water work on the project.
- Service access plannedIsolation valves and future service access are part of the design, not an afterthought.
Flow Rate, Fuel and Control Options
Tankless units vary by fuel, input, maximum flow, efficiency, venting and controls. The correct size depends on how many fixtures may run together and how much the incoming water must be heated.
Some systems can support recirculation or advanced controls, but those features require additional design and may change the installation scope.
WHAT WE COMPARE FOR YOU
The equipment decision depends on demand and utilities together.
- Maximum flow rate and temperature rise
- Fuel type and required input
- Venting material, route and termination
- Condensate handling where applicable
- Recirculation and advanced control options
- Service isolation and maintenance access
Water Heaters We Install: Good, Better, Best
We install Bradford White tank water heaters, made in the USA, and Navien condensing tankless water heaters. Here's how the options compare, from a simple tank swap to endless hot water.
Bradford White Atmospheric Tank
The standard natural-draft gas tank. The simplest, most affordable swap when your home already has a chimney or metal vent.
- 40, 50 and 75 gallon
- Vents into your existing chimney or flue
- We stock 40 and 50 gallon for fast replacement
Bradford White Power Vent Tank
A fan pushes exhaust out through PVC pipe, so it can vent out a side wall. Great when the chimney is gone or the furnace no longer shares it.
- 40, 50 and 75 gallon
- Sidewall venting with PVC pipe
- Fixes orphaned-chimney problems
Navien Tankless
Heats water on demand, so you never run out. Ultra-high-efficiency condensing design that frees up floor space.
- Endless hot water
- Up to 0.96 UEF efficiency
- NPE-240A2 has built-in recirculation for faster hot water
Compare our water heater options
| Model | Type | Sizes | Venting | Good for | Details |
|---|---|---|---|---|---|
| Good · Bradford White atmospheric tank | |||||
| Bradford White Atmospheric | Gas tank, natural draft | 40, 50 or 75 gal | Existing chimney or metal flue | Straight replacement, best value | Manufacturer ↗ |
| Better · Bradford White power vent tank | |||||
| Bradford White Power Vent | Gas tank, fan-assisted | 40, 50 or 75 gal | PVC through a side wall | No usable chimney, flexible placement | Manufacturer ↗ |
| Best · Navien condensing tankless | |||||
| Navien NPE-240S2 | Condensing tankless | Up to 5.8 GPM at a 67°F rise | PVC through a wall or roof | Endless hot water, top efficiency | Manufacturer ↗ |
| Navien NPE-240A2 | Condensing tankless with ComfortFlow | Up to 5.6 GPM at a 67°F rise | PVC through a wall or roof | Endless hot water with built-in recirculation | Manufacturer ↗ |
Tankless specs from navieninc.com as of October 2026. We size every water heater to your household and handle haul-away of the old unit.
Tankless Pricing and Financing
Water heater projects over $2,000 can be financed with longer terms for a lower monthly payment, subject to credit approval. Promotions, efficiency incentives and warranty terms vary and can change over time.
Pure Comfort confirms current equipment eligibility, registration requirements and maintenance-related warranty conditions during the estimate.
Financing
Projects Over $2,000
Longer terms with interest for lower monthly payments, subject to credit approval.
Free
In-Home Estimates
In writing, with no obligation.
Local Tankless Installation Experience
Streamwood-area homes present different gas, electrical, venting and water-line conditions. A tankless conversion in an older basement can require a different scope from a unit planned during a remodel.
Pure Comfort’s completed tankless projects provide first-hand knowledge of routing, isolation valves, drainage and service access. That experience helps set a realistic project plan before installation begins.
Real Reviews. Real Comfort.
When you need HVAC due to an unexpected event you want someone who not only can provide the service you need….
Great service. Very professional. They try all avenues to resolve issues with equipment. Always a pleasure to work….
Had an issue with the thermostat reading erroneously, as soon as I contacted Pure Comfort, they got back….
Our serviceman, Gene, was very responsive, professional and thorough. He explained each aspect of the issue clearly and….
I called them at 7am with no heat, the only available spot they had was in the afternoon, 5 minutes later they called….
Gene was professional, on-time, very friendly and did a thorough job inspecting our A/C unit. He also checked….
Quick and honest service and advice last minute on a Sunday. Clean crew and equipment. Gene was a knowledgeable….
Gene did not give up on the problem. It was a crazy situation but he never gave up found the problem and fixed it. Thank you….
Furnace wasnt working. Called Pure Comfort after hours and they came right out and helped me. The furnace….
Very professional, definitely knowledgeable had the furnace fixed in 10 minutes. I can honestly say I trusted Gene….
Tankless Water Heater FAQs
Does tankless hot water ever run out?
It does not store a fixed tank, but output is limited by flow rate and temperature rise.
Can it run several showers?
It depends on the unit capacity, incoming water temperature and total simultaneous demand.
Will my gas line need an upgrade?
Possibly. Gas input and pressure requirements must be checked for the selected unit.
Does tankless equipment need maintenance?
Yes. Water quality and manufacturer guidance affect flushing and service needs.
Can tankless replace any existing tank?
Often, but venting, utilities, drainage, space and project cost need evaluation.
Is tankless more efficient?
It can reduce standby losses, but actual performance depends on the equipment, use and installation.
How much does a tankless water heater cost?
A tankless water heater typically costs $4,500 to $6,500 installed. Replacing an existing tankless unit is at the lower end. Mounting a new unit on the wall, repiping, running new venting and gas piping changes push the price higher. Water heater projects over $2,000 can be financed with longer terms for a lower monthly payment, subject to credit approval.
What is included with a tankless water heater installation?
Every tankless installation includes removal and disposal of the old water heater, wall mounting the new Navien unit near the existing location, rerouting the hot and cold water piping, a service/isolation valve kit for future flushing, a pressure relief valve with discharge piping, and rerouting the gas piping with a new shut-off valve, union and drip leg as required. We also run new PVC exhaust and vent piping through an exterior wall, a condensate drain to a floor drain and the electrical connection, then commission the unit, leak-test every water and gas connection and clean up the work area. Corroded gas piping is replaced when we find it.
What warranty comes with a tankless water heater?
Our Navien tankless water heaters come with a 15-year limited heat exchanger warranty and a 5-year limited parts warranty from Navien, and Pure Comfort adds a 1-year labor warranty on the installation. The manufacturer warranty is subject to Navien’s terms, conditions and registration requirements, and we help you register the unit.
Tankless Water Heater Installation Across the Northwest Suburbs
Based in Streamwood and installing tankless systems throughout the surrounding communities. Pick your town to see local details, or give us a call and we will tell you straight away whether your address is in range.
Not on the list? We cover much of the northwest suburbs, so call and we will confirm your address in a minute.
Size Tankless Equipment for Real Demand
Tell us about the household, the fixtures that run together and the current setup. We will compare flow, utilities, venting and installation scope before recommending a system.
- You get a scheduled window and the technician's name
- We price the full project, not just the appliance
- In-home estimates are free, with no obligation
Leaking right now? Call us at (708) 515-4822 and turn the unit off until we can look at it.
Request Service or a Free Replacement Estimate
Tank vs Power Vent vs Tankless Water Heaters Compared
As of October 2026, a standard tank water heater is the lowest installed price, a power vent tank solves venting problems when there is no usable chimney, and a Navien tankless unit gives endless hot water with the longest warranty.
| Option | Installed price | Venting | Warranty | Best for | Learn more |
|---|---|---|---|---|---|
| Standard tank (gas) | 40 gal $1,600 to $2,000; 50 gal $1,700 to $2,200; 75 gal $2,700 to $3,300 | Vents into an existing chimney or flue | 6-year manufacturer parts, 1-year Pure Comfort labor | Straight replacements with a working chimney | Standard tank water heaters |
| Power vent tank | 40 gal $3,200 to $3,800; 50 gal $3,500 to $4,000; 75 gal $4,200 to $5,200 | A fan pushes exhaust out through a side wall | 6-year manufacturer parts, 1-year Pure Comfort labor | Homes without a usable chimney, or after a high-efficiency furnace leaves the chimney oversized | Power vent water heaters |
| Tankless (Navien) | $4,500 to $6,500 | Vents through a side wall | 15-year heat exchanger, 5-year parts, 1-year Pure Comfort labor (subject to Navien terms and registration) | Endless hot water and saving floor space | Tankless water heaters |
More detail on our water heater installation page.
Rebates you may qualify for
2026 utility programs for Northern Illinois homes. Amounts checked October 2026.
| Program | Equipment | Rebate |
|---|---|---|
| Nicor Gas | Tankless gas water heater (ENERGY STAR, UEF .95+) | $150 |
| ComEd | Heat pump water heater | Up to $750 |
The federal 25C tax credit ended for systems installed after December 31, 2025. Illinois income-qualified HEAR heat pump rebates (up to $8,000) are not available yet as of October 2026, and projects finished before the program opens will not qualify. We confirm the current status on your written quote. ComEd discounts come off your invoice when a ComEd heat pump-trained contractor installs qualifying equipment. Nicor Gas rebates require qualifying equipment and Nicor’s rebate application. Programs can change, so we confirm what your home qualifies for on your written quote. Programs and amounts can change, so confirm current details on the utility sites before you buy. Official details: Nicor Gas rebates · ComEd heat pump discounts.
Licensed, certified and accredited
- Lennox Premier Dealer
- NATE-certified technicians
- EPA Section 608 certified
- BBB Accredited Business
- Licensed business in the Village of Streamwood
- Registered Illinois LLC
- Fully insured