Uxbridge’s mix of century-old farmhouses, newer estate homes on well water, and older in-town builds on Brock Street all present different plumbing setups, and a tankless water heater that works perfectly in one house can need a completely different venting or gas line approach in the next. David covers all of Uxbridge and the Township, with same-day and emergency service available seven days a week.
From a first-time installation in a newer Uxbridge subdivision to an emergency repair on a 10-year-old Rinnai in an older in-town home, David handles it directly.
Many Uxbridge homes on well water need a sediment pre-filter installed alongside the tankless unit, skip that step and the heat exchanger clogs within a year or two. David sizes the unit correctly for your household’s peak demand and handles the gas line and venting work himself so there’s no coordination headache between trades.
David diagnoses the fault on arrival and gives you a straight answer: what broke, what it costs to fix, and whether it’s worth fixing. He carries common replacement parts, igniters, flow sensors, control boards, so most repairs wrap up the same visit.
If your current unit is past its useful life, David won’t talk you into the most expensive model on the shelf. He’ll match the replacement to your actual hot water usage, family size, number of bathrooms, and whether you’ve got a well or municipal water, and give you a straight installed price before anything gets ordered.
A tankless heater needs a descale flush once a year, more often if you’re on hard well water, which Uxbridge homeowners outside the municipal supply know firsthand. David also inspects the venting, inlet filter, and ignition system so small issues get caught before they strand you without hot water on a January morning.
Switching from a storage tank to a condensing tankless unit can cut your water heating costs by 30% or more. David walks you through the real payback timeline based on your current gas bill and water usage, no inflated numbers, just the math, so you can decide whether it makes sense for your home.
Uxbridge sits further from the GTA service corridor than Whitby or Ajax, which means some contractors won’t make the drive for an evening call. David does. If your unit fails on a weekend or a holiday and you’ve got no hot water, call (416) 508-4585, he answers the phone himself and tells you straight whether it’s a same-day fix.
I’ve been out to Uxbridge properties enough times to know that the older in-town homes on Brock and Toronto Streets often have undersized gas lines that need upgrading before a tankless unit can run properly, it’s one of the first things I check before quoting. You get a quote from me, the work is done by me, and I’m the one who answers if you have a question six months later.
A properly maintained gas tankless water heater typically lasts between 18 and 22 years, roughly twice the lifespan of a conventional storage tank. That number assumes annual descaling, clean venting, and an inlet filter that gets checked once or twice a year. Skip those steps and you’ll start seeing heat exchanger problems around the 8 to 10 year mark instead.
Ontario’s climate shortens lifespan in two specific ways. First, ground water temperatures here drop to around 4°C in winter, which forces the unit to work harder to hit your target temperature, accelerating wear on the burner and heat exchanger over time. Second, hard water deposits calcium scale inside the exchanger faster than in softer-water regions. An annual flush with a descaling solution keeps that build-up in check and protects the warranty on most brands.
Condensing units, the ones that pull heat out of the exhaust gases rather than venting them straight outside, have an additional component called the condensate neutralizer that needs periodic servicing. It’s a small maintenance point but one that gets missed easily if you’re not doing annual tune-ups.
A basic non-condensing gas tankless installation in an Uxbridge home where the gas line and venting are already in good shape runs between $2,000 and $3,200 installed. Condensing models with higher efficiency ratings, the ones that qualify for Enbridge rebates, typically land between $3,000 and $4,500 installed. The spread comes down to brand, BTU output, and whether any supplementary work is needed on the gas line or venting.
Uxbridge-specific costs to factor in: homes outside the municipal water supply often need a sediment and particulate pre-filter added to the cold water inlet, that’s typically $150 to $300 extra. Older in-town homes that haven’t had gas appliance work done in 20 years sometimes need a gas line upsized from half-inch to three-quarter-inch to supply enough pressure for a high-demand unit, add $300 to $600 for that work. Repairs on existing units range from $180 for a straightforward igniter swap to $600 or more for a heat exchanger or control board replacement.
Every job starts with a free quote. David gives you the number before anything is ordered or opened up. The best way to know what your specific job will cost is to get a free quote from David, no pressure, no obligation.
Uxbridge is an unusual market for HVAC and plumbing work because the housing stock spans nearly 150 years without the density you’d see in Whitby or Ajax. The oldest homes in the Brock Street core date to the 1870s and 1880s, with original plumbing that’s been modified in layers over the decades. Then you’ve got mid-century bungalows built in the 1950s and 60s on the residential streets east of Main, and a significant wave of larger estate and rural-residential builds from the 1990s through the 2010s on the township’s acreage lots, many of those on well water rather than municipal supply.
That well-water population is the biggest variable David encounters in Uxbridge. Township wells often carry higher mineral loads than Oshawa or Pickering municipal water, and tankless units don’t tolerate that well without proper filtration upstream. A whole-house sediment filter, or at minimum a dedicated pre-filter on the cold water inlet of the tankless unit, should be part of any installation quote for a property on well water. Without it, the heat exchanger can scale up enough to trigger flow-rate errors within 18 months.
The older in-town homes present a different challenge: original gas lines sized for a single older furnace and maybe a stove, which aren’t adequate for a high-BTU condensing tankless unit. David checks this before quoting so you don’t get surprised mid-installation. He also knows the venting considerations for homes where the utility room is in an older fieldstone basement, wall penetrations require specific planning to keep the installation code-compliant under Ontario’s B149.1 natural gas code.
The clearest early warning is an error code on the display panel, most modern tankless units from Navien, Rinnai, Noritz, and Bosch have self-diagnostic systems that flash a code when something’s off. Don’t ignore it and don’t reset it without writing the code down first. That code tells a technician exactly what the unit detected before the call, which saves diagnostic time and, in most cases, gets the repair done in a single visit.
Inconsistent water temperature, hot for the first two minutes, then a cold burst, then hot again, usually points to a flow sensor or a heat exchanger that’s partially scaled. In Uxbridge, where hard well water is common on rural properties, that scaling pattern tends to show up earlier than it does in homes on municipal supply. If you’re seeing temperature swings more than two years before your next scheduled service, it’s worth getting the heat exchanger flushed sooner.
A unit that ignites but shuts down quickly, or one that runs for a few seconds and cuts out, often has a venting issue. Tankless units draw combustion air from outside and exhaust through a separate pipe. In Durham Region winters, ice can form at the exhaust termination on the exterior wall, blocking the vent and triggering a safety shutoff. It’s a straightforward fix but one that needs a licensed technician to address safely.
Durham Region winters put tankless units through more strain than the product brochures typically account for. When ground water comes in at 3 or 4°C in February, the unit has to raise it 45 to 50 degrees Celsius to hit a 49°C delivery temperature, that’s near the top of the burner’s operating range. Units sized too small for the household’s peak demand struggle most in winter, which is why proper sizing at installation matters more here than in milder climates.
Insulating the cold water supply pipe between where it enters the home and where it reaches the tankless unit reduces heat loss on that run and eases the load on the burner in cold months. It’s a small thing but adds up over a heating season. Similarly, setting the unit’s delivery temperature to 49°C rather than 60°C reduces scale formation inside the heat exchanger without compromising safety at the tap, particularly relevant if you’re on well water in Uxbridge Township.
Before winter each year, check that the intake and exhaust vent terminations on your exterior wall are clear of debris, nesting, and ice damage from the previous season. David includes this check in every annual service visit, but it’s worth a visual inspection on your own between appointments. A blocked intake will trigger an error code almost immediately, a partially blocked one will cause intermittent performance issues that are harder to diagnose remotely.
Gas-fired tankless water heaters are governed by Ontario’s TSSA (Technical Standards and Safety Authority) and must be installed by a licensed contractor, TSSA Licence #000398183 in David’s case. That licence is verifiable through the TSSA’s public registry and covers gas fitting, which is the credential that matters for this work. An unlicensed installation voids the manufacturer’s warranty and, more critically, invalidates your home insurance coverage if something goes wrong.
Carbon monoxide is the primary safety concern. A cracked heat exchanger or a failing flue connection can allow combustion gases to enter the living space. Condensing units are generally safer in this regard because their exhaust temperatures are lower, but any gas appliance needs an annual inspection of the venting integrity. David checks every flue joint and termination as part of a service call, it takes ten minutes and catches issues before they become hazards.
On the efficiency side, Enbridge Gas offers rebates through its Home Efficiency Rebate Plus program for condensing tankless units that meet a minimum energy factor threshold. Eligibility depends on the unit you choose and your existing equipment, so it’s worth asking David to confirm which models qualify when you’re getting a quote. The rebate doesn’t change the installed cost upfront, but it reduces the net cost once it’s processed, and it’s real money, typically in the $100 to $500 range depending on the unit’s efficiency rating.
Checking the simple things before calling saves time for everyone.
Tankless units have self-diagnostic displays. Write down the error code and call Cassar, this tells us exactly what’s wrong before we arrive and often means the repair gets done in one visit.
There’s a small mesh filter screen on the cold water inlet that catches debris. It blocks up over time and restricts flow enough to prevent ignition. Uxbridge homes on well water see this happen faster than homes on municipal supply.
Make sure the gas shutoff valve behind the unit is fully open. It can get partially closed during other work in the utility area, a furnace service, a plumbing repair, without anyone noticing until the hot water stops working.
Running multiple hot water fixtures simultaneously can exceed the unit’s flow capacity, causing a cold burst. Try running one fixture at a time to test. If you’re consistently maxing out the unit, it may be undersized for your household’s actual demand.
Tankless units vent through the wall or roof. Check that the intake and exhaust pipes are clear, undamaged, and properly connected. In Durham Region winters, ice can block the exterior vent termination and trigger a safety shutoff, it’s one of the more common cold-weather calls David gets from Uxbridge homeowners.
If none of the above resolved it, the unit needs a licensed technician. David serves all of Uxbridge and Durham Region and picks up the phone himself.
Yes, for most Durham Region homeowners, but the payback timeline depends on what you’re replacing and how you use hot water. A condensing tankless unit uses 30% to 40% less gas than a standard storage tank for water heating, which translates to real savings on your Enbridge bill. In Durham Region, where natural gas is the dominant fuel and winter ground water temperatures are cold enough to push the unit close to peak output on a daily basis, a properly sized unit will consistently outperform a tank on efficiency.
The caveat is upfront cost. A tankless installation costs significantly more than swapping a storage tank for a new one, typically $2,000 to $4,500 installed versus $1,000 to $1,800 for a conventional tank replacement. At an average gas savings of $150 to $250 per year, you’re looking at an 8 to 15 year payback on the cost difference, depending on your usage. Add in an Enbridge rebate if your unit qualifies and that shortens the timeline. For most Uxbridge homeowners who plan to stay in the home long-term, it’s a sound decision, especially when you factor in the 18 to 22 year lifespan versus 8 to 12 years for a tank.
A standard non-condensing gas tankless installation in Durham Region runs between $2,000 and $3,200 installed, and condensing models land between $3,000 and $4,500. Those ranges assume the existing gas line is adequate and the venting location is straightforward. In Uxbridge specifically, two costs come up more often than elsewhere: a pre-filter for homes on well water ($150 to $300 extra) and a gas line upgrade for older in-town homes where the existing line is too small for a high-demand unit ($300 to $600 extra).
The main variables that push cost up are unit output (higher BTU units cost more), brand, and site-specific labour, longer gas line runs, difficult venting routes through thick exterior walls, or a utility room layout that makes the installation awkward. The variables that push it down are a clean existing installation where nothing supplementary is needed. Repairs on existing units start around $150 to $200 for simpler faults like igniters or thermistors and can reach $600 or more for heat exchanger or control board work.
The best way to know what your specific job will cost is to get a free quote from David, no pressure, no obligation.
It depends on the unit’s flow rate capacity and how many fixtures are running simultaneously, but the answer is yes, if the unit is sized correctly for your household. A single low-flow showerhead draws around 1.5 to 2 gallons per minute (GPM). A household with two showers running at the same time needs a unit rated for at least 6 GPM at your ground water temperature, which in Ontario’s winters means a unit rated higher than that in warmer conditions. Most residential units in the 150,000 to 199,000 BTU range handle two simultaneous showers comfortably in Ontario winter conditions.
Where people run into trouble is when an undersized unit gets installed, often because the contractor used summer ground water temperatures to calculate capacity rather than February temperatures. David sizes for peak winter demand, which means the unit performs adequately in the hardest conditions rather than just meeting spec on paper. If you’ve got an existing tankless unit that struggles with simultaneous hot water use in winter but handled it fine in summer, undersizing at installation is the likely cause. A replacement with a properly sized unit resolves it.
Most high-efficiency condensing tankless units require a 3/4-inch gas supply line at adequate pressure to operate at full capacity. Many older Uxbridge homes, particularly those built before the 1980s, have half-inch gas lines running to the utility room from the meter, which were sized for older lower-demand appliances. Running a new high-BTU tankless unit on an undersized line causes low-pressure faults, ignition failures, and performance issues, especially when other gas appliances in the home are running at the same time.
The upgrade itself involves running new 3/4-inch black iron or flexible corrugated stainless steel (CSST) pipe from the meter or from a suitably sized branch in the main line to the new unit location. In most Uxbridge homes, that’s a one- to two-hour job. David checks gas line sizing as part of every installation quote, it’s not an add-on surprise, it’s included in the assessment so the price you get reflects the actual job. All gas line work David performs falls under his TSSA Licence #000398183, which covers gas fitting in Ontario.
A straightforward tankless installation where you’re replacing an existing tankless unit with a new one of similar configuration takes three to five hours. Installing a tankless unit in place of a conventional storage tank takes four to six hours because the venting, gas connection, and sometimes the condensate drain all need to be reconfigured. If the gas line needs upgrading or the venting route is more complex, add one to two hours on top of that.
In Uxbridge, the installs that take longer are typically the older in-town homes where the utility area is in an original 1950s or 60s basement with a low ceiling and limited wall penetration options for the new venting. David works through those constraints rather than cutting corners on the vent route, which means the job might run a little longer but it’s done correctly and to code. In most cases, you’ll have hot water by the end of the same day David arrives. He’ll give you a realistic time estimate when you book so you can plan around it.
Cold water from a tankless unit usually points to one of four things: a flow sensor that’s not registering adequate water flow to trigger ignition, a blocked inlet filter restricting flow below the activation threshold, a gas supply issue preventing the burner from firing, or a venting fault that’s triggered a safety shutoff. The error code on the display panel is the fastest way to narrow it down, write it down before resetting anything.
For Uxbridge homeowners on well water, a blocked inlet filter is the most common cause of sudden cold water. Sediment from the well accumulates on the mesh screen and eventually cuts flow below the unit’s minimum activation rate, the unit senses the water movement but won’t ignite because it reads the flow as insufficient. Cleaning or replacing the filter screen resolves it immediately. If the filter is clear and there’s no error code, the next most likely causes are a failed igniter, a failing flow sensor, or a heat exchanger that’s scaled enough to shut the unit down on a thermal overload. All of those require a technician. Call David at (416) 508-4585 and he’ll ask a few questions over the phone to narrow it down before he arrives.
Annual servicing is the standard recommendation for most gas tankless units, and for Uxbridge homeowners on well water, twice a year is worth considering, particularly if your water has high mineral content. A service visit includes a descaling flush to clear calcium build-up from the heat exchanger, an inlet filter inspection and cleaning, a venting check for blockages or joint failures, an ignition system check, and a review of the error log if the unit stores fault history. It takes about 90 minutes.
The descaling step is the most important one. Calcium deposits inside the heat exchanger reduce its ability to transfer heat efficiently, which increases gas consumption and puts thermal stress on the exchanger walls. Left unchecked, it eventually causes the heat exchanger to fail, and that’s a $600 to $1,200 repair, or a full replacement if the unit is old enough that a new exchanger doesn’t make financial sense. Annual flushing costs a fraction of that and extends the life of the unit by years. David books annual service calls in advance so you don’t have to remember to schedule it yourself.
David installs and services all major gas tankless brands sold in Canada, including Navien, Rinnai, Noritz, Bosch, Bradford White, Takagi, and A.O. Smith. He’s worked on all of them and knows which brands tend to have specific failure points that come up more often, that knowledge matters when he’s quoting a repair on an older unit, because it affects whether a repair makes sense or whether replacement is the smarter call.
For new installations, David doesn’t carry a brand preference tied to dealer margins. He’ll recommend a unit based on your household’s flow requirements, your venting setup, your water source, and your budget. Navien and Rinnai are the two most common residential brands he installs in Uxbridge and the broader Durham Region because parts are readily available and the units hold up well with proper annual maintenance. That said, if you’ve got an existing unit from a different brand that’s been reliable, he’ll service it and give you an honest assessment of whether it’s worth keeping or replacing.
“Our Navien unit stopped producing hot water on a Saturday morning. David was at the house by early afternoon and had it fixed before dinner, turned out to be the flow sensor. Straightforward repair, no drama.”
“We’d been thinking about switching to a tankless unit for a couple of years but weren’t sure if it made sense given that we’re on well water out here in Uxbridge Township. David came out, looked at our setup, and explained exactly what we’d need, a pre-filter, a gas line upgrade, the whole picture. He didn’t oversell it. We went ahead with the installation and everything’s been running well since.”
“I’ve dealt with contractors who quote one number and invoice another. David quoted me $2,850 for the tankless install in my Uxbridge home and that’s exactly what I paid. He also put down a drop cloth in the utility room and left the space cleaner than he found it, which I wasn’t expecting.”
David covers all of Durham Region, if you’re near Uxbridge, he can get to you.
Same-day service available. TSSA certified. Honest pricing. Call or book online.
