Running out of hot water mid-shower or paying to heat a tank of water you’re not even using gets old fast. MT Dunn Plumbing installs, replaces, and services tankless water heaters for homes and businesses throughout Hillsboro, giving you endless hot water on demand while cutting down on wasted energy. Whether you’re upgrading an aging tank unit or outfitting a new build, our licensed technicians size and install the right system for your household’s actual usage, not a one-size-fits-all guess.
Our highly experienced plumbing professionals will contact you for a free estimate and consultation.
MT Dunn Plumbing has built a strong reputation in Hillsboro by providing dependable plumbing services. Customers often mention the team’s friendly approach, on-time service, and quality workmanship. From fixing small plumbing issues to handling larger projects, they deliver reliable results that customers can count on.
Switching to tankless is a big investment, and getting the installation right the first time matters.
Manufacturer-Trained Technicians
Certified to install and service major tankless brands, including gas and electric models.
Accurate System Sizing
We calculate flow rate and temperature rise for your household so you never run short on hot water.
Code-Compliant Installations
Proper venting, gas line sizing, and electrical work handled to current Hillsboro building codes.
Energy Savings Focus
Recommendations based on real usage data, not upsells on oversized equipment.
Retrofit Experience
Skilled at converting existing tank setups without tearing apart your utility space.
Upfront, Itemized Pricing
You see equipment, labor, and permit costs broken out before work begins.
Warranty Support
Registration assistance and follow-up service to protect your manufacturer warranty.
Same-Week Scheduling
Most installations booked and completed within days, not weeks.
Ongoing Maintenance Plans
Descaling and flushing services that extend the life of your unit.
Established Local Presence
A name Hillsboro homeowners recognize for straightforward plumbing work.
We treat every installation as a system upgrade, not just a swap-and-go job.
A technician walks through your home, counts fixtures and appliances that use hot water simultaneously, and asks about peak usage times to determine the right unit size and fuel type.
We assess whether gas or electric is the better fit for your home, checking existing gas line capacity, available venting paths, and electrical panel capacity if a conversion is needed.
Based on flow rate needs and household size, we recommend specific models and walk through the tradeoffs between condensing and non-condensing units, along with expected energy savings.
Technicians clear the mounting area, confirm clearance requirements, and stage the necessary venting, gas, water, and electrical components before work begins.
If replacing a tank unit, we safely drain, disconnect, and haul away the old equipment, capping or repurposing existing lines as needed.
The tankless unit is securely mounted, then connected to water lines, gas or electrical supply, and condensate drainage where applicable.
Correct venting is critical for combustion safety and efficiency, so technicians install vent piping according to manufacturer specs and local code requirements.
Once connected, we run hot water through multiple fixtures to confirm consistent temperature, proper flow rate, and correct ignition or heating response.
Every connection point is inspected for leaks, and gas lines are pressure-tested to confirm a safe, code-compliant installation.
Before we leave, technicians explain how to adjust temperature settings, reset the unit if needed, and what maintenance keeps it running efficiently long-term.
Most standard installations are completed in a single day, though gas-to-electric or venting reconfigurations may take longer.
Our goal is to help you save energy while enjoying reliable hot water every day. Here’s how we do it:
With our Tankless Water Heater Installation in Hillsboro, you’ll enjoy lower energy use, dependable hot water, and lasting value for your home.
Every tankless water heater installation begins with a detailed evaluation to ensure your home meets all necessary installation requirements.
Our team ensures every installation requirement is addressed, delivering a safe, efficient, and dependable tankless water heater for your Hillsboro home.
From what we’ve seen, the answer is a firm yes, with the right sizing. At MT Dunn Plumbing, we’ve seen how a properly sized tankless system keeps up with the hot water demands of busy Hillsboro families, something an undersized unit or an aging tank often can’t do.
Larger households put real strain on a hot water system, back-to-back showers, laundry, and dishwashing can all overlap during peak hours. A generic, one-size-fits-all installation might work fine for a single person or a couple, but it simply can’t keep pace with a family of five running multiple fixtures at once. That’s a significant gap, and time and again, it’s exactly where homeowners end up disappointed after switching to tankless.
We’ve walked into homes after a poorly sized installation where the household constantly ran out of hot water or dealt with temperature swings because the unit’s flow rate didn’t match their actual usage. In almost every case, a proper load calculation and the right unit size from the start would have solved the problem before it ever became frustrating.
The cost of getting the sizing right upfront is minor compared to the potential cost of a disappointing system, wasted upgrade money, or having to install a second unit later to compensate. We think of it as matching the technology to your life, you’re not just installing a water heater, you’re making sure it actually keeps up with how your household lives day to day.
Larger Hillsboro homes, in particular, deserve this extra planning. Multiple bathrooms, growing families, and simultaneous fixture use are common in the area, and these are precisely the conditions where correct sizing makes or breaks the upgrade.
Getting this right isn’t about buying the most expensive unit, it’s about matching the system to how your household actually uses hot water. That’s the calculation our team walks through with every family before we install anything.
Choosing the right water heater depends on your household’s hot water needs, budget, and long-term goals. Here’s how we guide Hillsboro homeowners through the decision.
Aspect
Hot Water Supply
Energy Efficiency
Space Requirements
Lifespan
Upfront Cost
Operating Cost
Leak Risk
Maintenance
Installation Complexity
Best For
Tankless Water Heater
Continuous, heats water on demand
No standby heat loss, generally more efficient
Compact, wall-mounted, frees up floor space
Typically 15–20 years with proper maintenance
Higher initial equipment and installation cost
Lower long-term energy costs
Minimal water stored, lower flood risk
Periodic descaling, especially in hard water areas
May require venting or gas line upgrades
Households wanting efficiency and long-term savings
Traditional Tank Water Heater
Limited to tank capacity, can run out
Constantly reheats stored water, wasting energy
Bulky footprint, needs dedicated closet or utility space
Typically 8–12 years before replacement
Lower upfront purchase and installation cost
Higher ongoing energy costs from standby loss
Full tank failure can cause significant water damage
Periodic flushing to remove sediment buildup
Generally simpler like-for-like replacement
Budget-conscious replacements or lower usage homes
For many Hillsboro households, the higher upfront cost of tankless pays for itself over time through lower energy bills and a longer equipment lifespan.
Fast Response • Upfront Pricing • Guaranteed Work
MT Dunn Plumbing provides professional tankless water heater installation, replacement, and repair services in Hillsboro, OR, helping homeowners get reliable, energy-efficient hot water without the guesswork.
A malfunctioning tankless unit means no hot water fast, so we prioritize getting your system back online quickly.
Priority Emergency Dispatch
No hot water calls are treated as urgent and scheduled accordingly.
Diagnostic Expertise
Technicians are trained to read error codes and diagnose issues specific to tankless systems.
Common Issue Resolution
Fast fixes for ignition failure, mineral scale buildup, flow sensor issues, and venting blockages.
Parts on Hand
Frequently needed components stocked to avoid delays waiting on special orders.
Honest Repair-vs-Replace Guidance
Clear recommendations when a repair no longer makes financial sense.
Safety-First Approach
Gas and electrical components inspected thoroughly before returning a unit to service.
Transparent Emergency Rates
Upfront pricing communicated before any repair work starts.
Post-Repair Testing
Full performance check to confirm consistent hot water delivery before we leave.
Costs vary based on unit size, fuel type, and whether venting or gas line upgrades are needed, but we provide a detailed estimate before any work begins.
With regular maintenance, most tankless units last 15 to 20 years, considerably longer than a typical tank water heater.
Yes, though it may require additional electrical or gas line work, which our technicians will evaluate during your home assessment.
Yes, periodic descaling is recommended, especially in areas with hard water, to keep the unit running efficiently.
Some utility providers and manufacturers offer rebates for qualifying high-efficiency units, and we can help you check current eligibility.
Ready to stop worrying about running out of hot water? Contact MT Dunn Plumbing to schedule an expert and professional tankless water heater installation, replacement, or repair in Hillsboro, and get a system sized and installed to actually match how your household uses hot water.
At M T Dunn Plumbing, we proudly serve Hillsboro, Beaverton, Portland, Tigard, Lake Oswego, Sherwood, Tualatin, West Linn, Wilsonville, Aloha, Newberg, Gaston, Banks, North Plains, and the surrounding Portland metro areas.
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