We Install, Repair, and Maintain Tankless Water Heaters
- Same-day tankless water heater service — 7 days a week
- Expert installation, repair, and annual descaling
- Sized for Milwaukee winters (40–45°F inlet) for steady hot water
- Code-compliant gas, venting, and recirculation solutions
For emergency no-hot-water service, call 262-220-7020.
Capital’s Tankless Water Heater Service
No hot water? Capital delivers same-day service, 7 days a week across Milwaukee. We quickly diagnose ignition/flow issues, scale buildup, recirculation faults, venting/condensate problems, and gas or control failures—so your hot water’s back fast.
Get your hot water back today — call 262-220-7020 or schedule online.
Why Tankless Works Well in Milwaukee
Milwaukee winters are long and cold, with incoming water temperatures that can dip well below what you see in national spec sheets. That colder inlet water means your tankless unit has to work harder to reach a comfortable 120°F. The result: proper sizing and flow-rate planning matter more here than in warmer markets. Done right, you’ll enjoy steady hot water through back-to-back showers and laundry cycles—without paying to keep 40–75 gallons hot all day.
Homes across Wauwatosa, West Allis, Brookfield, Shorewood, Whitefish Bay, Glendale, Mequon, Menomonee Falls, Oak Creek, Greenfield, and Franklin also bring a mix of older basements, tight mechanical closets, and long hot-water runs. Those details drive choices about venting paths, gas supply, condensate handling, and whether a recirculation loop belongs in the design.
Types of Tankless Water Heaters
Gas Tankless (Natural / Propane)
Best fit for Milwaukee whole-home use. Modern condensing models handle our 40–45°F winter inlet water efficiently, but they need proper gas line sizing, direct-venting, and a condensate neutralizer. We install indoors with freeze-safe vent routing and can add recirculation for faster hot water to distant baths.
Electric Tankless
Whole-home electric usually isn’t practical here due to large amperage/panel requirements—especially in older homes. It shines as point-of-use (remote bath, attic suite, shop sink) or when gas isn’t available. If electric won’t pencil out, we’ll recommend a high-efficiency storage tank that does.
Big picture, it’s gas or electric. From there, we fine-tune: condensing vs. non-condensing, freeze-safe venting/condensate, optional recirculation, or cascaded units for larger homes. If gas isn’t available—or whole-home electric doesn’t pencil out—we’ll recommend point-of-use electric or a high-efficiency tank that fits better.
Our Tankless Water Heater Installation Process
1. Home & Usage Assessment
We start by learning how you use hot water: number of fixtures, what runs at the same time, bath count, and the longest run to a tap.
2. Gas, Venting & Condensate Planning
We verify gas line size and meter capacity, map a safe/direct vent path with snow and wind in mind, and plan where condensate will drain with proper neutralization.
3. Site Design (Replacement vs. New Install)
For replacements, we confirm your current vent path and gas piping are still viable. For new installs, we design a clean layout that meets manufacturer specs and local code.
4. Permits and Scheduling
We handle permitting, coordinate any utility needs, and schedule work so downtime is minimal.
5. Professional Installation
The unit is mounted and piped; we add isolation valves for easy future descaling, connect gas, water, power, and route intake/exhaust with correct clearances and slope.
6. Commissioning at Winter Conditions
We commission the system using winter-realistic inlet temperatures, verify combustion, dial in gas pressures, check for leaks, and set recirculation (if included) for comfort without wasted energy.
7. Controls Setup & Homeowner Walkthrough
We program temperature and schedules, explain the controller indicators, and show you basic do’s and don’ts so operation feels effortless.
8. Maintenance Plan & Documentation
You leave with a simple maintenance schedule (annual flush, screen cleaning, vent/condensate checks), warranty info, and our contact details for quick support.
Permits, Code & Safety
We pull the permit, meet the inspector, and install to manufacturer specs and Milwaukee code—correct gas line sizing, safe vent termination above snow lines and clear of doors/windows, proper slope to prevent icing, bonded/grounded power, and verified combustion air. Designs account for lake winds, roofline turbulence, and older basement layouts so your system runs safely in January, not just on paper.
Equipment Choice, Warranties & Right-Sizing
Brand matters, but the match matters more. We specify tankless models with strong local parts support and clear warranties, then right-size to your winter temperature rise and busiest 10 minutes of use, pairing the unit with the correct gas, vent, condensate, and (if needed) recirculation plan. The result is steady hot water and fewer callbacks.
That’s the difference between a box swap and a Milwaukee-ready tankless install. Once everything is commissioned at winter inlet temps, we document settings, handle permits/inspection, and leave you with a simple care plan (descale schedule, recirc program, and who to call if anything changes). You’ll know exactly how your system is set up, why it was sized the way it was, and what to expect when January hits—steady, efficient hot water without the guesswork.
Have questions or want to schedule your install? Call 262-220-7020 and we’ll get your project on the calendar.
Common Tankless Repairs in Greater Milwaukee
Even well-designed tankless systems sometimes need attention. If you’re getting no hot water, temperature swings, or error codes, the usual culprits are scale, gas pressure under load, vent/intake restrictions, mis-set recirculation, or winter condensate. We test under real conditions and fix the root cause—so the repair lasts.
Ignition failures and flame errors.
Often tied to dirty flame sensors, venting issues in windy conditions, or borderline gas supply. We clean sensors, verify gas pressure under load, and check vent/inlet alignment and terminations for winter-wind effects.
Scale-related performance drops.
Slow hot water or fluctuating temps during showers usually indicate a scaled heat exchanger or clogged inlet screens. We perform a controlled descale, restore flow, and recommend water treatment so you don’t see the same symptoms in six months.
Error codes tied to recirculation or thermistors.
Incorrect recirc programming, stuck check valves, or a failed temperature sensor can lead to lukewarm water or cycling. We diagnose the control logic, replace failed components, and recalibrate to your usage pattern.
Condensate backups in winter.
Frozen lines or missing neutralizer traps can back condensate into the unit. We re-route to conditioned space where feasible, add heat-trace where required, and make sure the neutralizer is sized correctly.
When a repair estimate approaches a meaningful fraction of a new system—or the unit is 12–15 years old—we’ll show you the math and let you decide. No pressure tactics.
Preventative Maintenance
Milwaukee’s hard water and slong heating season call for annual service on most households, and sometimes semiannual if your usage is heavy. A thorough visit includes:
- A heat-exchanger flush with the correct solution and dwell time, plus cleaning the inlet screens and water filter.
- Burner inspection, combustion check, and verification of gas pressures at full fire.
- Vent and intake inspection for obstructions, snow/ice patterns, and proper slope.
- Recirculation review (timers/demand settings), and confirmation that return temps aren’t wasting energy.
- Condensate neutralizer media check or replacement and clear routing to a non-freezing drain.
That’s how you keep efficiency high, showers steady, and warranties intact.
Why Milwaukee Chooses Capital for Tankless
✔ Capital Cares. Tankless shines when it’s built for Wisconsin winters and our mineral-heavy water. We design to your family’s busiest 10 minutes on a January morning—not brochure math—so hot water stays steady.
✔ Same-day help, 7 days a week. No hot water? We show up today. Our techs diagnose under real load and fix what matters—ignition and flame errors, scale-slowed flow, recirculation faults, vent/condensate issues, gas or control failures—without guesswork.
✔ Code-clean installs, old-fashioned service. We pull permits, meet inspections, and follow manufacturer specs and Milwaukee code: correct gas sizing, vent terminations above snow lines with proper slope, bonded/grounded power, reliable combustion air. Red carpet in, clean house out.
✔ Right solution, not a bigger sale. If a high-efficiency tank fits better, we’ll say so. When tankless is the win, we match capacity to your winter temperature rise, add scale protection, and tune recirculation for fast comfort without wasted energy.
✔ Award-winning and always on. We answer the phone 24/7 and stand behind our work.
Testimonials
What Our Customers Say
When a Tank (Yes, a Tank) Might Be the Better Fit
Tankless isn’t automatic. Short-term ownership plans, ultra-low simultaneous demand, or homes where the gas/electrical upgrades don’t pencil out can make a high-efficiency storage tank the smarter move. We install both and will tell you straight if a tank delivers better value for your situation.
Frequently Asked Questions
Will a tankless keep up with two showers on a January morning?
Yes—when it’s sized for Milwaukee’s winter inlet temps and your home’s peak flow. We design to worst-case conditions, not brochure numbers, so the second shower isn’t a gamble.
Do I need to upgrade my gas line?
Often. Many existing lines were sized for a furnace and a tank. Tankless units at full fire can require larger piping and sometimes a meter review. We test and propose what’s actually needed before you commit.
How much maintenance is required with hard water?
Plan on an annual flush at minimum, plus inlet screen cleaning. If your water is very hard, we’ll recommend scale-inhibitor or softening to protect the heat exchanger and keep efficiency high.
Can I add tankless during a kitchen/bath remodel?
That’s the ideal time. Walls are open for a dedicated recirc return, vent paths are easier, and we can centralize location to shorten runs. You’ll get faster hot water and higher system efficiency.
What if the vent or intake freezes?
A properly designed system considers snow lines, slope, and wind. When we see chronic icing on older installs, we re-route terminations, add clearances, or relocate the unit to a better wall to solve it for good.
Are rebates available?
Wisconsin programs change over time. If current incentives are available for qualifying high-efficiency equipment, we’ll lay them out and help with paperwork. We never base your ROI on hypothetical rebates.
Ready to Go Tankless?
Capital HVAC designs and installs tankless systems that perform in Milwaukee winters, not just in a lab. You’ll get a clear design, a clean installation, and a maintenance plan that protects your investment.
Why Choose Capital?
