Tankless Water Heater
Installation London Ontario
Tankless water heaters deliver hot water on demand — no storage tank, no running out, lower energy bills every month. Hawana installs all major brands across London Ontario, handles the full conversion including new PVC venting and gas line sizing, and advises you on annual descaling — essential given London's water hardness.
The Thing Every London Ontario Tankless Owner Needs to Know
London's municipal water contains 120–180 mg/L of dissolved calcium and magnesium — classified as moderately hard to hard. Inside a tankless water heater, those minerals heat up and deposit on the heat exchanger. Unlike a storage tank where sediment sinks to the bottom, in a tankless unit the mineral scale coats the heat exchanger surfaces directly — reducing efficiency, increasing gas consumption, and causing premature failure within 5–7 years if not addressed.
The fix is simple: annual descaling with a citric acid flush. Takes 45–60 minutes, costs approximately $169–$184 all-in with Hawana. Manufacturers require it to maintain warranty validity. Skip it for 3+ years in London's water and you risk irreversible heat exchanger damage that voids the warranty and destroys the unit.
🧪 Hawana Annual Tankless Descaling Service — London Ontario
Full service includes: connection, complete citric acid flush cycle (45–60 min), reconnection, flow rate test, temperature verification, and a written service record for your manufacturer warranty file. Book it alongside your annual HVAC maintenance visit to save a trip.
Maintenance plan members receive 10–20% off the service fee.
✅ No separate trip charge — full service included in the $149 feeTop Tankless Water Heater Brands for London Ontario Homes
Hawana installs all major brands and recommends based on your home size, flow rate needs, and budget — not on whatever has the highest margin.
NPE-A2 / NPE-S2 Series
The most-installed tankless brand in Ontario. Known for its built-in recirculation pump (hot water at the tap faster), ComfortFlow technology, and industry-leading condensing efficiency. Excellent reliability record in London's water conditions.
✅ Most popular in London OntarioRU / RUR Series
Known for outstanding durability and one of the widest BTU output ranges available — making it a strong choice for larger homes with multiple simultaneous hot water demands. Strong warranty and widely available parts.
✅ Ideal for larger homes, 3+ bathroomsGreentherm Series
German engineering, compact design, and competitive pricing. Excellent mid-range option for smaller to medium London Ontario homes. Good condensing efficiency and straightforward servicing.
✅ Ideal for smaller homes, budget-consciousInfiniti K Series
Contractor-preferred brand known for parts availability and straightforward installation. Strong 10-year heat exchanger warranty. A reliable workhorse choice for London Ontario homes that want no-fuss performance.
✅ Ideal for reliability-focused buyersWe also install Noritz, Rheem, AO Smith, and other brands. Hawana recommends the right unit for your home — not just what's in stock.
What's Included — And What It Costs
Every Hawana tankless installation is a complete, permitted conversion. No hidden extras discovered on installation day.
Old tank removed & disposed
We drain, disconnect, and haul away your old tank. Site left clean. No disposal run for you.
New PVC direct-vent installed
Tankless units vent differently than tanks. All new venting is included — run to exterior, sealed and tested.
Gas line assessment + upgrade if needed
Tankless units draw more BTUs than tank units. We assess your existing supply line and upgrade to 3/4" or 1" if required for proper operation.
Condensate drain installed
High-efficiency condensing tankless units produce condensate that must drain properly. Installed and tested as part of every conversion.
TSSA permits pulled
Hawana handles all required permits for gas appliance installation in London Ontario. Legally required — included at no extra charge.
Full operational walkthrough
We show you how to operate your unit, how to read error codes, and explain the annual descaling requirement for London's water before we leave.
| Installation Scenario | Typical All-In Cost (London ON) |
|---|---|
| Tank-to-tankless conversion, single-family home, standard gas supply Includes unit, new PVC venting, condensate drain, permits, old tank disposal |
$2,200–$3,200 |
| Tank-to-tankless + gas line upgrade (3/4" or 1") Required when existing line is undersized — common in older London homes |
$2,800–$4,000 |
| High-output unit (200,000+ BTU) for large home or multiple zones 3+ bathrooms, high simultaneous demand |
$3,500–$4,500 |
| Annual descaling service (after installation) Strongly recommended annually given London's water hardness |
~$169–$184 |
💡 Does Tankless Pay Off in London Ontario? The Numbers
The honest picture: In London Ontario, tankless is not primarily a short-term payback decision. The real benefits are endless hot water, freed-up utility space, 15–20 year lifespan vs 10–12 for tanks, and Enbridge rebates that reduce upfront cost. If running out of hot water is your problem, tankless solves it permanently. If pure savings is the goal, a high-efficiency tank is cheaper to install and the payback on tankless is long.
Full Conversion — One Visit, Everything Included
Tankless installation takes 5 to 8 hours for a complete conversion. Here's every step.
Free In-Home Assessment
We assess your gas supply, existing venting location, water supply lines, and space to confirm the right unit and installation scope.
Written All-In Quote
Exact price for unit + all installation components. No line items discovered on the day. No surprises on the invoice.
Permits Pulled
Hawana handles all TSSA permit applications — required under Ontario law. Included in the installation price.
Old Tank Out
Existing unit drained, disconnected, and removed from premises. Haul-away included.
New System In
Unit mounted, new PVC venting run, gas line assessed and upgraded if required, condensate drain installed, water connections completed.
Commission + Walkthrough
Full test: flow rate, temperature, error-code check, leak test. Then a full owner walkthrough including descaling schedule and warranty requirements.
Abdullah Ghzail — TSSA Certified Gas Technician
Tankless installation is not just swapping a unit — it requires gas line sizing, venting design, and commissioning knowledge that most general plumbers don't have. Abdullah holds full TSSA gas technician certification, has installed tankless systems across London Ontario since 2021, and is one of very few local technicians who both installs and services tankless units AND provides the annual descaling service that London's hard water makes mandatory. Every installation includes a written service record, rebate documentation, and our 30-day satisfaction guarantee.
London Ontario Tankless Customers
5.0 stars · 139 Google reviews · See all reviews ↗
"Had a Navien tankless installed to replace our aging 50-gallon tank. Hawana handled everything — new PVC venting out the side of the house, gas line upgrade from 1/2 to 3/4 inch, permits, old tank hauled away. The difference in our gas bill was noticeable from the first month. Abdullah also explained the descaling requirement for London's water, which no other company even mentioned when I got quotes."
"Family of 5 — we were constantly running out of hot water with our old 40-gallon tank. Hawana installed a Rinnai RUR199iN. Not once have we run out of hot water since. The installation was seamless, the venting was done cleanly, and we got the Enbridge rebate paperwork sorted the same day. Worth every penny."
"Called Hawana back for the annual descaling after they installed our Navien unit last year. Quick, professional, unit was fully flushed and back online in under an hour. They showed me the amount of scale that came out — significant for just one year. Definitely going on a maintenance plan so it's scheduled automatically going forward."
Tankless Installation — London Ontario & Area
Serving London and communities within 50km. Annual descaling service available in all zones.
✅ Zone 1 — No Travel Fee (within 25km)
Standard installation pricing. Annual descaling available.
- London ON
- Lambeth
- Komoka
- Arva
- Dorchester
- Ilderton
- Delaware
- Belmont
- Thorndale
- Lucan
- Thamesford
- Oakridge
🚗 Zone 2 — Small Travel Fee (25–50km)
Installation and annual descaling available. Travel fee confirmed before booking.
- St. Thomas
- Strathroy
- Aylmer
- Ingersoll
- Glencoe
- Port Stanley
- Parkhill
- Exeter
- Watford
- Mitchell
- Grand Bend
- Petrolia
📞 Zone 3 — Call to Confirm (50km+)
Call (647) 550-4220 to confirm availability and travel fee.
- Woodstock
- Sarnia
- Kitchener
- Windsor
- Brantford
- Chatham-Kent
Tankless Water Heater FAQs — London Ontario
How much does tankless water heater installation cost in London Ontario?
Why does a tankless water heater need annual descaling in London Ontario?
What is the best tankless water heater brand for a London Ontario home?
Does switching to tankless actually save money in London Ontario?
How long does tankless installation take in London Ontario?
Are there Enbridge rebates for tankless water heaters in London Ontario?
Schedule Annual Descaling on a Maintenance Plan — Never Forget It Again
London's water hardness means tankless descaling isn't optional — it's warranty-required maintenance. Hawana's maintenance plans include annual reminders and discounted descaling service. The Total Home Plan ($279/yr) covers your tankless water heater inspection alongside your furnace, AC, and heat pump in one annual visit. Add descaling at your plan's discount rate and protect your investment automatically.
See Maintenance Plans — from $119/yr →Ready to Go Tankless? Start With a Free In-Home Quote
London Ontario and surrounding area. All major brands. Full conversion including venting, gas line, and permits. Old unit disposed. Enbridge rebate assistance included.
Written quote · All-in pricing · Old unit disposed · TSSA certified · 30-day guarantee
