Tankless Water Heater
Installation London Ontario
Endless hot water. Lower gas bills. A unit that lasts 20+ years. Hawana installs high-efficiency condensing tankless water heaters across London Ontario — Navien NPE Series and Rinnai RU Series — gas line sizing, PVC venting, permits, and old unit disposal all included. TSSA certified gas technician on every installation.
Gas line · PVC venting · permits · disposal · HST included
Free written in-home quote — call (647) 550-4220
Why Hawana Only Installs High-Efficiency Condensing Tankless Units
Not all tankless water heaters are equal. Hawana installs only condensing units — 96 to 99% AFUE — because they are the only units that make long-term financial sense for London Ontario homes.
96–99% AFUE — No Wasted Heat
A non-condensing tankless unit (80–82% AFUE) sends 18–20% of combustion heat out the exhaust. A condensing unit extracts that heat back from the flue gases through a secondary heat exchanger, achieving 96–99% efficiency. In London Ontario’s climate that gap translates to $150–$300 in annual gas savings versus a non-condensing unit.
PVC Venting — No Liner Cost
Condensing units exhaust at low enough temperatures (50–80°C) to use inexpensive PVC pipe rather than stainless steel flue liner. This matters in London Ontario’s older homes — running PVC through an existing chase or to a sidewall is far less costly and disruptive than installing a stainless steel liner up through the chimney.
Endless Hot Water Under Real Demand
A properly sized condensing unit (Navien NPE-240S2 at 11.2 GPM peak) handles a London Ontario family of 4–5 running simultaneous shower, laundry, and kitchen demand. Non-condensing units at similar price points are typically undersized for real-world Canadian winter groundwater temperatures (7–10°C) which reduce flow rate significantly.
20–25 Year Lifespan
Navien’s dual stainless steel heat exchangers carry a 15-year warranty and are rated for 20–25 years of service with annual descaling. Non-condensing units with copper heat exchangers in London Ontario’s moderately hard water fail significantly earlier. A condensing unit installed today may outlast the next two cycles of a tank water heater.
No Standby Heat Loss
Your existing 40–60 gallon tank keeps water hot 24 hours a day — even at 3am when everyone is asleep. This standby loss accounts for roughly 15% of your home’s gas consumption. A condensing tankless unit uses zero gas when hot water is not being drawn, eliminating that loss completely.
No Tank Failure Flood Risk
Tank water heaters fail by leaking — catastrophically at end of life. For London Ontario homeowners with finished basements, a tank rupture can cause tens of thousands in water damage. A condensing tankless unit mounts on the wall with no stored water — eliminating this risk entirely and often reducing home insurance premiums.
Is a Condensing Tankless Right for Your London Ontario Home?
Hawana never sells a product that isn’t the right fit. Here is honest guidance on when tankless is the best choice — and when it isn’t.
✓ Tankless Is the Right Call When…
- Your household has 3 or more people with simultaneous hot water demand
- Your current tank is 8+ years old and heading for replacement
- You have a finished basement and want to eliminate tank flood risk
- You plan to stay in your London Ontario home for 7+ years (payback period)
- Your current tank runs out during back-to-back showers
- You want to free up floor space in a tight utility room
→ A Tank Replacement May Be Better When…
- It’s a 1 or 2 person household with low simultaneous demand
- Your current tank is under 5 years old and still performing
- You plan to sell the home within 3 years (shorter payback)
- Your gas line or venting access makes the upgrade very complex
- Budget is the primary driver and lower upfront cost matters most
Need a tank replacement instead? See Water Heater Installation London Ontario →
London Ontario Hard Water & Your Tankless Unit
London Ontario’s municipal water supply has a hardness of approximately 140–200 mg/L (moderate-hard). For a condensing tankless water heater, this means calcium and mineral scale will build up on the stainless steel heat exchanger plates over time — reducing efficiency, flow rate, and ultimately shortening the unit’s life if not managed.
Annual descaling is essential. Hawana walks every customer through the annual descaling process (circulating a citric acid or food-grade white vinegar solution through the heat exchanger for 30–45 minutes) at the time of installation. Our maintenance plans include annual descaling as part of the service visit. This single maintenance step is the difference between a unit that lasts 12 years and one that lasts 25.
Gas line sizing note: Most London Ontario homes have 1/2″ gas supply lines — insufficient for a condensing tankless unit that draws up to 199,000 BTU/h at peak demand. A 3/4″ or 1″ line is required. Hawana assesses gas line capacity at the free in-home quote and includes any required upgrade in the all-in price.
Condensing Tankless Water Heater Installation Cost London Ontario 2026
All prices are all-inclusive: equipment, installation labour, gas line work, PVC venting, permits, old unit disposal, and HST. Free written in-home quote before any commitment.
Simple replacement of existing tank or tankless unit where gas line and venting access are straightforward. Ideal for 2–4 person households. Navien NPE-S2 or Rinnai RU Series. Dual stainless steel heat exchangers. ENERGY STAR certified.
Navien NPE-S2 or Rinnai RU installation including gas line upgrade from 1/2″ to 3/4″ — required for most London Ontario homes switching from a tank. Covers most standard installations with moderate venting runs.
Navien NPE-A2 with ComfortFlow — integrated 0.8-gallon buffer tank plus built-in recirculation pump eliminates cold water sandwich. Ideal for London Ontario homes with long plumbing runs, 4+ bathrooms, or families who prioritize instant hot water at every tap.
Prices in CAD, all-inclusive. Exact price after free in-home gas line assessment. Complex installations (long venting runs, major gas upgrades) quoted individually.
Condensing Tankless Brands — London Ontario
Hawana is trained and certified on the leading condensing tankless brands. Equipment recommendations are based on your household’s actual peak flow rate demand — never brand preference or margin.
Industry-leading condensing technology with dual stainless steel heat exchangers. NPE-S2 is Hawana’s most-installed model for London Ontario homes. NPE-A2 adds ComfortFlow buffer tank and recirculation pump for instant hot water.
AFUE: 0.96–0.97 · Peak flow: up to 11.2 GPM · Warranty: 15yr HX, 5yr parts · Low NOx (20ppm)
Rinnai’s condensing Ultra Series with ThermaCirc360 recirculation capability. Excellent reliability record in Ontario hard water conditions. Strong alternative to Navien for homeowners who prefer Rinnai’s service network.
AFUE: 0.96 · Peak flow: up to 11 GPM · Warranty: 12yr HX, 5yr parts · Modulating burner
German-engineered condensing tankless with modulating copper heat exchanger. Compact wall footprint. Good choice for mechanical rooms with limited wall space.
AFUE: 0.95 · Peak flow: up to 10 GPM · Warranty: 15yr HX (copper), 5yr parts
Top-mounted connections designed for direct tank replacement — minimal plumbing rerouting in most London Ontario utility rooms. 0.97 UEF and 25-year heat exchanger warranty make it a strong long-term value choice.
UEF: 0.97 · Peak flow: up to 11.1 GPM · Warranty: 25yr HX, 5yr parts
Tankless Water Heater Installation Process — London Ontario
From your first call to the first shower of endless hot water — exactly what to expect with Hawana.
Free In-Home Assessment
TSSA certified technician measures your household’s peak simultaneous flow rate demand, inspects gas line diameter, assesses venting route, and evaluates London Ontario water hardness for annual maintenance planning. Free. No obligation.
Right-Size Equipment Selection
Hawana recommends the correct Navien or Rinnai model for your household’s actual demand — not a generic size. Written all-inclusive quote provided: equipment, gas line work, venting, permits, disposal, HST. Approve before we start.
Permits Pulled
All required gas and plumbing permits pulled before installation begins. Ontario law requires TSSA licensed technician for all gas appliance installations. Hawana handles all permit paperwork and inspection coordination.
Old Unit Removed
Existing tank safely shut down, gas disconnected, drained, and removed from your home. Old unit disposal is included — hauled away by Hawana. Site protected throughout to keep your utility room clean.
Installation & Gas Line
New condensing unit wall-mounted. Gas line upgraded to correct diameter. Dual PVC intake and exhaust venting run (no stainless steel liner required). Water connections and isolation valves installed for easy future servicing and annual descaling.
Commissioning & Maintenance Brief
Commissioned to manufacturer specifications. Temperature set to 49°C. Full flow test across simultaneous outlets. Annual descaling process demonstrated to homeowner. Warranty registered. Permit submitted for inspection.
Abdullah Ghzail — Lead HVAC Technician & Founder
Abdullah has installed Navien NPE Series and Rinnai RU Series condensing tankless water heaters across London Ontario since founding Hawana in 2021. He is TSSA certified — the licence required by Ontario law for any gas appliance installation — and trained by both Navien and Rinnai on proper sizing, gas line assessment, PVC venting, and commissioning procedures. He sizes every unit based on your household’s actual peak simultaneous flow rate, not a rule-of-thumb guess. He is honest about when a tank replacement is the better financial choice and will tell you directly if tankless doesn’t fit your situation. His installations pass permit inspection on the first visit, every time.
London Ontario Tankless Water Heater Installation Reviews
5.0 stars · 139 Google reviews · Read all reviews ↗
“Hawana installed a Navien NPE-240S2 in our Byron home. Abdullah measured our actual demand before recommending the model — not just the biggest unit. He found our existing 1/2″ gas line was undersized and included the upgrade in the written quote with no surprises on installation day. The unit has performed flawlessly through two winters. Gas bill down noticeably from the first month.”
“Our 12-year-old tank was on borrowed time — finished basement, so a flood risk. Hawana installed a Navien NPE-A2 with recirculation. The difference is immediate: hot water at every tap in under 10 seconds versus 45 seconds we waited before. Installation was clean, permit handled, old tank removed. Abdullah was thorough about the annual descaling process which no one had ever explained to us.”
“I asked Hawana whether tankless was right for our 2-person household. Abdullah was direct: for our usage pattern and tank age, a straight tank replacement was the smarter financial choice. We went with the tank option at hawana.ca/water-heater-installation-london-ontario. He could have sold me the more expensive unit but gave me honest advice instead. That integrity is exactly why I’ll call Hawana for everything going forward.”
Tankless Water Heater Installation London Ontario — FAQ 2026
Detailed answers to the most common questions London Ontario homeowners ask about condensing tankless installation.
How much does tankless water heater installation cost in London Ontario in 2026?
What is the best tankless water heater for a London Ontario home?
Does a tankless water heater need a larger gas line in London Ontario?
How long does a Navien tankless water heater last in London Ontario?
Is tankless better than a tank water heater for a London Ontario home?
What maintenance does a Navien tankless water heater need in London Ontario?
Do I need a permit to install a tankless water heater in London Ontario?
What is the Navien NPE-A2 ComfortFlow and do I need it?
What neighbourhoods does Hawana serve for tankless installation in London Ontario?
Tankless Water Heater Installation Areas — London Ontario
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Ready for Endless Hot Water in London Ontario?
Free in-home assessment. Gas line sizing included. All permits handled. Navien and Rinnai certified installation. Written all-in quote before any commitment.
All-inclusive quote · Gas line sizing included · Permits handled · TSSA certified · 30-day guarantee
