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Combi Boiler Services in Lake Oswego, OR
Expert Combi Boiler Services in Lake Oswego, OR
When your home needs reliable heating and endless hot water from one compact system, a combination boiler delivers. At Alchemy Plumbing, we specialize exclusively in combi boiler repair, maintenance, and installation throughout Lake Oswego. We know these systems inside and out—because that’s all we work on.
Combi boilers heat your home and provide hot water on demand without storage tanks or wasted space. We’re factory-trained on Navien and Rinnai combination boilers, the industry’s most trusted brands for energy efficiency and performance. Whether you need emergency repairs, annual maintenance, or a new installation, we deliver precision work that keeps your system running reliably year after year.
Need a combi boiler service in Lake Oswego? Alchemy Plumbing brings specialized expertise, honest pricing, and dependable support. Call us today for fast, professional service.
Our Services
- Bathtub Installation
- Combi Boiler Services
- Drain Cleaning
- Drain Pipe Installation
- Drain Pipe Maintenance
- Drain Pipe Repair
- Emergency Plumber
- Faucet Repair & Installation
- Garbage Disposal Installation
- Gas Line Installation
- Gas Line Repair
- Home Repiping
- Hydro Jetting
- Main Water Line Repair
- Main Water Line Replacement
- Plumbing Inspections
- Plumbing Maintenance
- Plumbing Repair
- Rooter
- Sewer Line Inspection
- Shower Installation
- Shower Valve Replacement
- Sink Installation
- Slab Leak Deletection & Repair
- Sump Pump Installation & Replacement
- Sump Pump Repair
- Tankless Water Heater Installation
- Toilet Repair & Installation
- Trenchless Sewer Line Replacement
- Water Filtration Installation
- Water Heater Repair
- Water Heater Replacement & Installation
- Water Leak Detection & Repair
- Water Softener Installation
Contact Us
What Your Neighbors Are Saying About Us
10/10 Recommended
From start to finish, Alchemy was a great team to work with. They were friendly, personable, and had great follow-up & communication.
Natalie S.
Happy Customer
From start to finish, Alchemy was a great team to work with. They were friendly, personable, and had great follow-up & communication.
Gina P,
Will Call Again
Alchemy Plumbing absolutely exceeded all of my expectations.
Ashley S.
Great Experience
I’d highly recommend Alchemy Plumbing — 100%. If I need work done in the future, they’ll be my first call.
Tami Z.
Friendly & Professional
Alchemy Plumbing offered us a free 65-point inspection, which Brandon and Justin handled with exceptional professionalism.
Cheryl L.
Will Call Again
I highly recommend Alchemy Plumbing. They are absolute professionals from when I called and made the appointment to the end of the job.
Bragdon S.
5 Stars
They came out quickly when our water heater went out and had it back up and running quickly.
Eliot T.
How Can We Help With Your Combination Boiler Needs?
Combi boilers are different from traditional heating systems. They require specialized knowledge and manufacturer-specific training—which is exactly what we bring to every service call.
We handle all combination boiler services, including:
- Emergency repairs and troubleshooting
- Annual maintenance and safety inspections
- System upgrades and replacements
- New installations for remodels or new construction
- Pressure testing and leak detection
- Control system diagnostics and programming
Because we specialize in Navien and Rinnai systems, we stock genuine parts and know these units down to every valve, sensor, and heat exchanger. If something goes wrong, we diagnose it quickly and fix it right—usually on the first visit.
What Makes Combination Boilers Different?
A combi boiler does the work of two appliances in one compact wall-hung unit. It heats water for your radiators or radiant floors while also providing instant hot water for showers, faucets, and appliances—no storage tank needed.
Here’s how they work:
The unit contains two heat exchangers. The primary exchanger heats water that circulates through your home’s heating system. When you turn on a hot water tap, sensors detect the demand and redirect heat to the secondary exchanger, which instantly heats fresh water from your main supply. You get hot water within seconds, without waiting for a tank to refill.
This tankless design eliminates standby heat loss and saves space. No cold water tanks in the attic. No hot water cylinders taking up closet room. Just efficient, on-demand heating and hot water from a single unit about the size of a small suitcase.
Why Choose a Combi Boiler for Your Lake Oswego Home?
Combination boilers deliver real advantages for homeowners who value efficiency, reliability, and space savings.
Energy Efficiency: Combi boilers only heat water when you need it. That eliminates the constant heat loss from keeping a storage tank hot 24/7. Modern condensing units like Navien and Rinnai models achieve 95% AFUE efficiency, which means lower utility bills and a smaller environmental impact.
Space-Saving Design: Wall-mounted installation frees up floor space in utility rooms, basements, and closets. You eliminate bulky storage tanks entirely—perfect for Lake Oswego homes where every square foot counts.
Endless Hot Water: A direct connection to your water main means you never run out. Traditional tanks can be depleted by back-to-back showers or running the dishwasher while someone’s bathing. Combi boilers deliver continuous hot water as long as you need it.
Cleaner Water: Water comes straight from your municipal supply instead of sitting in a storage tank. That means fresher, cleaner hot water at every tap.
Faster Installation: Fewer components mean simpler installation and lower upfront costs compared to conventional boiler systems with separate tanks and cylinders.
Navien Combination Boilers: Built for Performance
Alchemy Plumbing specializes in Navien NCB-H and NFC-H series combi boilers—the #1 selling combination boilers in North America for good reason.
Navien units feature stainless steel heat exchangers that resist corrosion better than copper, which extends service life and reduces maintenance needs. The NCB-H series provides space heating up to 150,000 BTU/h and domestic hot water up to 210,000 BTU/h. The larger NFC-H series delivers heating up to 199,900 BTU/h, making it ideal for bigger homes or high hot water demand.
Both series achieve 95% AFUE efficiency with Energy Star certification. They include 10-year heat exchanger warranties and feature high turndown ratios for precise temperature control. That reduces energy waste and prevents excessive cycling that wears out components prematurely.
Navien’s compact wall-hung design supports flexible venting with PVC, CPVC, or polypropylene materials. You can run 2-inch venting up to 60 feet or 3-inch venting up to 150 feet, which gives installers flexibility in tight spaces or challenging layouts.
The built-in recirculation pump and buffer tank eliminate the cold water sandwich effect common in other tankless systems. And the intuitive WiFi-enabled controls let you adjust temperatures and monitor system performance from your phone.
Rinnai Combination Boilers: Precision and Reliability
Our technicians are factory-trained on Rinnai I-SERIES+ condensing combi boilers that deliver simultaneous hot water and home heating without disruption.
Rinnai combination boilers use servo-based bypass control for precise domestic hot water temperature regulation. The system maintains consistent temperature even when flow rates change—no sudden hot or cold bursts mid-shower.
The units support multiple heating zones, so you can control temperatures in different areas of your home independently. Outdoor reset sensors continually adjust output based on changing weather conditions, which optimizes efficiency and comfort without constant manual adjustments.
Like Navien, Rinnai builds their heat exchangers from stainless steel for excellent durability and corrosion resistance. The compact design requires less space than traditional boilers and installs faster in both existing homes and new construction.
Rinnai combi boilers work with natural gas or propane and include on-board displays for easy temperature control and system monitoring. They integrate seamlessly with radiant floor heating, baseboards, radiators, fan coils, and air handlers.
Combi Boiler Repair Services
When your combination boiler stops working, we respond fast with expert diagnostics and lasting repairs.
Common issues we fix include:
- Low water pressure or pressure loss
- No hot water or inconsistent water temperature
- Strange noises like banging, whistling, or kettling
- Boiler won’t ignite or shuts down repeatedly
- Error codes and control panel failures
- Leaking pipes, valves, or heat exchangers
- Radiators not heating properly
- Pilot light or flame sensor problems
- Pump failures and circulation issues
- Frozen condensate lines
We arrive with genuine Navien and Rinnai replacement parts on our trucks, which means most repairs get completed on the first visit. We don’t patch problems temporarily—we fix them permanently with manufacturer-approved parts and methods that protect your warranty.
Combi Boiler Maintenance Plans
Regular maintenance keeps your combination boiler running efficiently and prevents expensive breakdowns during Lake Oswego’s coldest months.
Annual professional servicing is essential for safe operation and warranty protection. During maintenance visits, we check system pressure (should read 1.0-1.5 bar when cool), inspect for leaks, test flame color (should be blue), and bleed radiators to remove trapped air that reduces heating efficiency.
We also inspect both heat exchangers for scale buildup, clean burners and sensors, test all safety controls, and verify proper venting and combustion air supply. We insulate exposed pipes to prevent winter freezing and ensure your condensate drain flows freely.
Proper maintenance extends equipment life by years, reduces energy costs by keeping efficiency high, and catches small issues before they become major failures. We offer flexible maintenance plans that include priority scheduling and discounts on repairs.
Combi Boiler Installation
Installing a combination boiler requires specialized knowledge of heating loads, water flow rates, gas line sizing, and venting configurations. We handle every detail.
We start with a thorough home evaluation to calculate your heating requirements and hot water demand. Then we recommend properly sized equipment—not oversized units that waste energy or undersized ones that struggle to keep up.
Our certified installers handle all aspects, including:
- Gas line connections and pressure testing
- Venting configuration and condensate drainage
- Integration with existing radiators, baseboards, or radiant floors
- Multi-zone control setup when needed
- WiFi control programming
- Permit applications and inspections
Combination boilers work with various heating applications, including finned tube baseboards, cast iron radiators, radiant floor heating, fan coils, and air handlers. We configure systems for your specific layout and heating needs.
All installations meet Oregon building codes and manufacturer specifications to protect your warranty coverage. We test everything before we leave—no shortcuts, no guesswork.
Why Our Combi Boiler Services Stand Above the Rest
Specialization matters. We don’t dabble in combination boilers—they’re our focus.
Every technician on our team receives factory training directly from Navien and Rinnai. We stay current on software updates, new models, and evolving best practices. That expertise translates to faster diagnostics, better repairs, and installations that perform optimally from day one.
We also bring deep local experience. We understand Lake Oswego’s climate, building types, and fuel options. We know which systems work best in different homes and how to configure them for maximum efficiency and longevity.
You’re not hiring guesswork. You’re hiring a team that stands behind every job, supports your home long after install day, and shows up when others won’t.
Need a Combi Boiler Expert Near Me in Lake Oswego?
We live and work right here in Lake Oswego. That means fast scheduling, reliable service, and honest answers without the corporate runaround.
Whether your heating needs are urgent or you’re planning ahead, we offer flexible scheduling and transparent pricing. No hidden fees. No bait-and-switch tactics. Just straightforward service from professionals who respect your time and your home.
Get it done right. Get it done with Alchemy.
Frequently Asked Questions
What's the difference between a combi boiler and a regular boiler?
A combi boiler provides both heating and hot water from one unit without storage tanks. Regular boilers need separate hot water cylinders and cold water tanks, which take up more space and waste energy through standby heat loss.
How long do combi boilers last?
With proper annual maintenance, combination boilers typically last 15-20 years. Navien and Rinnai units with stainless steel heat exchangers often exceed that range.
Can a combi boiler handle multiple showers at once?
It depends on the model and your water pressure. Most combi boilers handle 1-2 simultaneous demands well. Larger models like Navien’s NFC-H series can supply 3+ fixtures simultaneously.
Do combi boilers work with radiant floor heating?
Yes. Both Navien and Rinnai combination boilers integrate seamlessly with radiant floor systems, baseboards, radiators, and other hydronic heating applications.
How much does a combi boiler installation cost in Lake Oswego?
Installation costs vary based on system size, complexity, and any required upgrades. Contact Alchemy Plumbing for a free consultation and upfront pricing tailored to your home.
