Clarington’s rapid growth in Bowmanville, Newcastle, and Courtice has put a lot of newer homes on the grid with tankless units that need proper sizing, correct venting through PVC or stainless liner, and a gas line that can actually handle the BTU load, and older rural properties converting from tank systems need all of that figured out before the work starts. David covers all of Clarington and the rest of Durham Region, and he’s available the same day you call, including emergencies.
Every job below is something David handles personally, from the first call through to cleanup.
David sizes the unit to your home’s actual hot water demand before ordering anything. In Clarington’s newer Bowmanville subdivisions, that often means accounting for multi-bathroom layouts and a gas line that was roughed in for a tank, not a high-BTU condensing unit. You get the right unit, installed correctly, the first time.
Ignition failures, error codes, pressure relief issues, or a unit that runs cold mid-shower, David diagnoses it at the unit, not over the phone with a checklist. He stocks common parts for Navien, Rinnai, and Noritz units so most repairs finish the same day he arrives.
If your unit is 15 or more years old or repair costs are pushing past 50% of replacement value, David’ll tell you straight. He won’t push a replacement to run up a bill, if a repair makes sense, that’s what he’ll recommend. When replacement is the right call, he handles removal, disposal, and installation in a single visit where possible.
Tankless units need an annual flush to clear mineral scale, especially in areas with harder water. David descales the heat exchanger, inspects the burner and igniter, cleans the inlet filter, and checks the venting connections. Skipping this shortens the unit’s life and can void the manufacturer warranty.
Upgrading from a standard tank or an older non-condensing tankless to a 96%+ AFUE condensing unit can cut your water heating costs noticeably. David calculates whether your existing gas line and venting setup can support the upgrade, or what changes are needed, before you spend a dollar. Ontario’s Enbridge rebate program sometimes applies, David’ll let you know if your situation qualifies.
Clarington stretches from Courtice all the way east through Newtonville and Kendal, and David covers the whole municipality. If your tankless unit fails on a cold January morning and you’ve got kids in the house, call (416) 508-4585, David picks up, not a dispatcher, and he’ll tell you honestly how quickly he can get there.
I’ve been working in Clarington since 2011, and the number of tankless units I’ve seen installed without a proper load calculation or with undersized gas piping tells me homeowners here have had some rough experiences with contractors who don’t slow down before the job starts. I show up with the right information, give you a quote before I touch anything, and I do the work myself, you’re not getting a subcontractor I’ve never met.
Whether you’re in a newer build off Regional Road 57 or an older property on a rural lot east of Newtonville, I’ll give you the same honest assessment and the same pricing you can count on.
A properly maintained tankless water heater lasts 18 to 22 years in most Ontario homes, roughly double the lifespan of a traditional tank unit. The key word is “properly maintained.” Units that never get descaled or inspected often fail well before the 15-year mark, while those with annual service regularly hit 20-plus years without major repair bills.
What shortens the lifespan most in Ontario is mineral scale buildup on the heat exchanger. Our water is moderately hard across Durham Region, and over time that scale acts as insulation, forcing the burner to work harder to hit temperature. The heat exchanger cracks, or the unit starts throwing error codes it can’t recover from. An annual flush and descale clears this before it becomes a structural problem.
Venting also matters. Ontario winters push condensing tankless units hard. Freeze-related damage to intake and exhaust pipes, or connections that worked loose over a few seasonal cycles, can introduce combustion issues that age the unit faster than normal wear. Checking the venting every fall before heating season is a five-minute job that can prevent a costly repair mid-winter.
For a standard natural gas tankless water heater installation in Clarington, swapping out an existing tank for a condensing tankless unit in a straightforward utility room setup, most homeowners pay between $3,500 and $5,500 all in, including the unit, labour, and venting. That range moves depending on the unit’s BTU rating, whether the gas line needs upgrading, how the venting needs to run, and whether there’s a permit involved.
Repairs are typically $200 to $600 for most common failures, igniter replacement, flow sensor issues, valve problems. A heat exchanger replacement on an older unit can run $800 to $1,200, which is when the repair-versus-replace conversation becomes worth having. If the unit’s under 10 years old and otherwise in good shape, replacing the exchanger often makes sense. If it’s 15-plus years old and showing other wear, a new unit usually wins financially over a 5-year horizon.
Every job David quotes is a firm price, you see the number before any work starts. The best way to know what your specific job will cost is to get a free quote from David, no pressure, no obligation.
Clarington’s housing stock is unusually varied for a Durham Region municipality. Bowmanville and Newcastle have seen significant residential development since the early 2000s, with many detached and semi-detached homes built between 2005 and 2020 that were roughed in for tank water heaters, not tankless. Converting those homes means evaluating the gas line diameter, a ¾-inch line that was adequate for a 40,000 BTU tank often needs upgrading to 1-inch or larger to feed a 180,000 to 199,000 BTU condensing tankless unit without pressure drop issues that trigger nuisance shutoffs.
Further east, in communities like Newtonville, Orono, and the rural areas toward Millbrook, you’ll find older homes built in the 1970s and 1980s, many of which are on propane rather than natural gas. Propane tankless installations require a specifically configured unit and a regulator setup that handles the different pressure requirements. David’s worked on both sides of that equation across Clarington and knows where the common mistakes happen.
There’s also a growing number of homes in the Courtice area, closer to Oshawa, that are mid-1990s builds with original equipment now hitting the end of its service life. Homeowners in those areas are often weighing tankless for the first time and need someone who’ll walk them through the real trade-offs, not just sell them the most expensive unit on the shelf.
The clearest sign is an error code on the display panel. Most modern tankless units from Navien, Rinnai, Noritz, and Bosch throw a specific code when something’s wrong, and that code tells a trained technician exactly where to start. Don’t reset it and hope it goes away. Write it down and call. It’s diagnostic information that makes the repair faster and cheaper.
A unit that starts hot and then goes cold mid-shower usually points to one of three things: a flow sensor that’s failing and dropping the demand signal, a heat exchanger that’s scaled badly enough to lose efficiency under sustained load, or a venting issue causing the unit to flame-out on combustion. Each has a different fix, and guessing wastes time. In Clarington, where some homes sit on older gas infrastructure with pressure that can vary slightly at the meter, David also checks for supply-side pressure drops that can cause intermittent ignition failures that look like unit problems but aren’t.
Slow hot water delivery, water that never quite gets to full temperature, and rumbling or popping sounds from the unit under load all signal that scale has built up on the heat exchanger. At that stage, a descale service often restores full performance. Catch it early and it’s a maintenance call. Leave it too long and it becomes a replacement conversation.
Durham Region’s winters are hard on outdoor pipe runs and venting. If your tankless unit vents through an exterior wall, inspect the termination caps each November, birds nest in them over summer, and even a partial blockage causes combustion issues that can trigger safety shutoffs. The intake needs airflow; the exhaust needs a clear path out. Both matter equally.
Ground-level cold air intakes can draw in debris and ice crystals during severe cold snaps. Some condensing units handle this better than others, but in a sustained cold period below -15°C, it’s worth knowing where your intake draws from and whether it has a screen that could ice over. David advises Clarington homeowners with low wall intakes to check them during prolonged cold weather, it’s a two-minute look that can prevent a service call.
Set your unit to 49°C for normal household use. Higher settings increase scale buildup rates and raise the risk of scalding, especially if you have young children. Lower settings (below 49°C) can allow Legionella bacteria to survive in the water. That 49°C setting is the right balance for Ontario households, and it’s what David sets units to on every installation unless there’s a specific reason to adjust.
In Ontario, any gas appliance installation, including tankless water heaters, must be done by a TSSA-licensed technician. That’s not optional. An unlicensed installation can’t be properly inspected, won’t meet insurance requirements, and creates real carbon monoxide risk if the venting isn’t set up correctly. David carries TSSA Licence #000398183, which you can verify directly on the TSSA public registry. That number matters because it’s the difference between work that’s done right and work that leaves your family at risk.
Ontario’s Enbridge Home Efficiency Rebate Plus (HER+) program has, in certain program cycles, offered rebates for upgrading to high-efficiency water heating equipment. Eligibility depends on the existing equipment being replaced, the efficiency rating of the new unit, and whether the home meets the program’s participation criteria. David’ll flag whether your situation likely qualifies when he does the quote, he won’t oversell the rebate, but he won’t leave money on the table either.
From a pure efficiency standpoint, condensing tankless units with an Energy Factor of 0.90 or higher are the standard David recommends for Ontario homes. In a household that uses between 150 and 225 litres of hot water daily, the operating cost difference between a condensing tankless and a conventional tank can be $200 to $400 per year, a real number that adds up over a 20-year unit life.
Checking the simple things before calling saves time for everyone, here’s where to start.
Tankless units have self-diagnostic displays. Write down the error code and call Cassar, this tells us exactly what’s wrong before we arrive.
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.
Make sure the gas shutoff valve behind the unit is fully open. It can get partially closed during other work in the utility area.
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.
Tankless units vent through the wall or roof. Check that the intake and exhaust pipes are clear, undamaged, and properly connected.
If none of the above fixed it, the unit needs a licensed technician. David serves all of Clarington and Durham Region and picks up the phone himself.
Yes, for most Durham Region households, a tankless water heater pays for itself over time, but the math depends on your household’s hot water use and what you’re replacing. A condensing tankless unit rated at 0.90 or higher Energy Factor will typically cut your water heating costs by 20 to 30 percent compared to a conventional tank, which in Ontario with current natural gas rates often works out to $200 to $400 a year in savings. Over a 20-year unit life, that’s real money. The upfront cost is higher, no question, you’re looking at $3,500 to $5,500 installed versus $1,200 to $2,000 for a replacement tank. But the tankless unit also lasts nearly twice as long, so the per-year ownership cost is competitive. Households with two or more bathrooms in active use benefit the most, because endless hot water and no standby heat loss both contribute to the return. For homes in Clarington where the existing tank is approaching 10 years old, switching at replacement time is usually the smarter call financially.
Most tankless water heater installations in Durham Region fall between $3,500 and $5,500 all in, covering the unit, labour, venting, and any minor gas line work. The low end of that range applies when you’re in a straightforward swap situation, tankless replacing tankless, existing venting is compatible, gas line diameter is adequate. The higher end applies when the gas line needs to be upsized (which is common when converting from a tank), when venting needs to run through a new wall penetration, or when the unit being installed is a larger capacity model for a bigger household. Propane conversions or installations in older rural Clarington properties can push beyond $5,500 if the regulator and line work is significant. Permit fees vary by municipality but are typically $100 to $200 in Clarington. The best way to know what your specific job will cost is to get a free quote from David, no pressure, no obligation.
It’ll keep up if it’s sized correctly for your household’s peak demand, that’s the part that goes wrong when a unit is installed without a proper load calculation. A typical low-flow shower head uses about 7 to 9 litres per minute. Running two showers simultaneously means you need a unit that can deliver at least 14 to 18 litres per minute at a rise of roughly 35°C above incoming cold water temperature. In Ontario’s winters, incoming water can drop to 4 or 5°C, which means you’re asking the unit for a 45°C rise to reach 49°C at the tap, and not every unit marketed as “whole-home” actually hits those numbers at full flow in cold weather. David sizes the unit to your household before recommending anything. A correctly sized condensing unit from Navien or Rinnai handles two showers running simultaneously in most Clarington homes without any loss of temperature. The problem is almost always a unit that was undersized at installation, not a fundamental flaw in tankless technology.
Most homes in Clarington that currently have a gas tank water heater were plumbed with a ½-inch or ¾-inch gas line to the water heater location. A conventional 40,000 to 50,000 BTU tank runs fine on that. A condensing tankless unit typically draws 150,000 to 199,000 BTU at peak, which is three to four times the demand, and a ¾-inch line often can’t deliver enough gas volume at the right pressure to feed it without a pressure drop that causes ignition problems and nuisance error codes. David checks the existing line diameter, the run length from the meter, and the pressure at the appliance connection before recommending a unit. In many Clarington installs, upsizing to a 1-inch line from the meter or from the nearest tee is necessary, and that work gets factored into the quote up front. It’s not always required, some homes have oversized lines already, but you need someone who checks before assuming. Skipping this check is one of the most common reasons a newly installed tankless unit underperforms.
A standard tankless water heater installation in Clarington takes between three and five hours in most cases. A straightforward swap where a previous tankless unit is being replaced with a compatible new model, the venting is already in place, and the gas line is adequate, that’s closer to two to three hours. Conversions from a tank system that need new venting penetrations through the wall, gas line upsizing, and removal of the old tank tend to run five to seven hours. If a permit is required and the municipality needs an inspection before the unit goes into service, that adds a scheduling step, the permit gets pulled beforehand, the work gets done, and the inspection is scheduled. In most Clarington cases, David can coordinate the full sequence so your hot water is restored the same day the work starts. He’ll give you a realistic time estimate when he does the quote, not a vague window that leaves you waiting.
Cold water from a tankless unit usually comes down to one of four things: the unit isn’t igniting, the flow sensor isn’t registering demand, the heat exchanger is so scaled it can’t transfer heat efficiently, or the venting is compromised and the unit is flame-shutting for safety. The ignition failure is the most common cause David sees across Durham Region, and it often comes down to either a faulty igniter, a gas supply issue (valve partially closed, low pressure at the appliance), or a blocked intake vent. In Clarington, where older gas infrastructure in some rural areas can see minor pressure fluctuations, low supply pressure is worth checking early. The flow sensor issue is also common in areas with harder water, where debris from the supply line gradually clogs the inlet filter screen until the sensor can’t register enough flow to trigger ignition. If you’re seeing cold water intermittently rather than consistently, the flow sensor or filter is often the culprit. Check the error code on the display first, write it down, and call David, that code points directly at the cause and makes the diagnosis much faster.
Once a year is the right interval for most Clarington homes. The annual service covers flushing and descaling the heat exchanger, cleaning the inlet filter screen, inspecting the burner assembly and igniter, checking the pressure relief valve, and verifying the venting connections are intact and clear. Some manufacturers require annual servicing to keep the warranty valid, skipping a year doesn’t void the warranty immediately in most cases, but a lapse that contributes to a failure can give the manufacturer grounds to decline a claim. In areas with harder water or higher sediment in the supply line, semi-annual filter cleaning is worth adding between full service calls. David recommends booking the annual service in early fall, before heating season starts, so you’re not discovering a problem in February. It’s also the right time to check the venting before winter, which David does as part of every annual service. One call, one visit, and your unit is set for the year.
David works on all the major brands you’ll encounter in Clarington and across Durham Region, Navien, Rinnai, Noritz, Bosch, Bradford White, Rheem, and Takagi are the ones that come up most often. He carries parts for the most common failure points on Navien and Rinnai units because those two brands are the most widely installed in the area, which means most repairs on those models happen the same day without waiting on a parts order. For less common brands or older units where parts may need to be sourced, he’ll tell you the timeline honestly before starting the job. David doesn’t have a preferred brand he pushes because it pays him a margin, he recommends the unit that fits your household’s demand, your gas line situation, and your budget. If you already have a brand preference, he’ll work with it. If you want a recommendation based on the specific conditions in your Clarington home, he’ll give you one with the reasoning behind it.
“Our tankless unit in Bowmanville stopped igniting on a Friday afternoon in January. David was there the same day and had it running within an hour, turned out to be a blocked inlet filter that we’d never had cleared.”
“I called David about a tankless replacement in our Courtice home and honestly expected the usual sales pitch for the most expensive unit. Instead, he walked me through the sizing calculation, explained why our existing gas line needed upsizing, and gave me a straight quote before he left. The install was clean, he even swept out the utility room. I wouldn’t call anyone else for gas work in Clarington.”
“The price David quoted us was exactly what we paid, not a dollar more. For a full tankless installation in our Newcastle house, that kind of straight dealing is rare. He was done by mid-afternoon and the place was clean when he left.”
David covers all of Clarington and the surrounding Durham Region communities listed below.
Same-day service available. TSSA certified. Honest pricing. Call or book online.
