Tankless Water Heater Installation in Calgary
Same-day water heater replacement. Bradford White certified. 10-year leak-free guarantee. No surprises — installed right the first time.
Tankless Water Heaters We Install in Calgary
We’re an authorized Rinnai installer and carry the full SENSEI® RX lineup — the most advanced condensing tankless water heaters available in Canada today. Every unit is sized for Calgary’s cold groundwater temperatures and backed by Rinnai’s industry-leading 15-year warranty.
IBC SFT 99
Best For:
1–2 person Calgary homes, condos
1–2 person Calgary homes, condos
0.89 UEF
28,500 BTUh
99,000 BTUh
15 Years (HX)/ 5 Years Parts
IBC SFT 125
Best For:
2–4 person Calgary homes, mid-size households
2–4 person Calgary homes, mid-size households
0.89 UEF
28,500 BTUh
125,000 BTUh
15 Years (HX) / 5 Years Parts
IBC SFT 199-1
Best For:
4–6 person Calgary homes, high-demand households
4–6 person Calgary homes, high-demand households
0.89 UEF
28,500 BTUh
199,900 BTUh
15 Years (HX) / 5 Years Parts
Also Installing Navien NPE-A2 Series
North America’s #1 selling condensing tankless brand. The Navien NPE-240A2 delivers 199,900 BTUh, 0.95 UEF, ComfortFlow® built-in recirculation, and a 15-year heat exchanger warranty — an excellent choice for large Calgary homes and high-demand applications.
Get Your Exact Tankless Water Heater Installation Price
Every Calgary home is different — gas line size, venting setup, and current unit all affect the price. Tell us a bit about your home and we’ll give you an accurate quote fast. No obligation. No spam.
- Written quote before any work starts
- Same-day & next-day installation available
- No surprise charges — ever
- Licensed Calgary gas fitters
- Rinnai & Navien authorized installer
How Much Does Tankless Water Heater Installation Cost in Calgary?
This is the first thing most Calgary homeowners want to know and we’ll give you a straight answer. Tankless water heater installation in Calgary typically costs between $4,800 and $7,500 all-in, depending on the unit, your home’s existing gas and venting setup, and whether any upgrades are required.
| What's Included | Typical Range |
|---|---|
| Unit cost (Rinnai SENSEI® RX or Navien NPE-A2) | $3,200 – $4,500 |
| Labour & installation | $800 – $1,800 |
| Gas line upgrade (if required) | $300 – $900 |
| Venting — new or modified | $400 – $800 |
| Total Installed — Most Calgary Homes | $4,800 – $7,500 |
The biggest variables are your gas line and venting. Homes that need the gas line upsized from ½" to ¾" — or need new Category III stainless venting runs — add cost. Homes replacing an existing tankless unit are typically on the lower end. We assess everything during your free consultation before quoting a single dollar.
The price we quote is the price you pay. No "we found something extra" calls on installation day. No surprise charges after the job. Transparent, written pricing is something Comfort Union has built our Calgary reputation on since 1995.
Every Calgary home is different. Use our quick form to get a customized installation quote based on your home's actual setup — no obligation, no hard sell.
Why Calgary Homeowners Are Switching to Tankless Water Heaters
A traditional hot water tank keeps 40 gallons heated around the clock — even at 3am when nobody’s home. It runs out during back-to-back showers. And when it fails, it fails completely. A tankless water heater in Calgary solves all three problems: endless hot water, lower energy bills, and a system built to last 20+ years.
Endless Hot Water
Endless Hot Water Never run out mid-shower again. Tankless units heat water on demand — whether you’re running two showers, the dishwasher, and laundry simultaneously, your hot water supply never quits.
Lower Energy Bills
Lower Energy Bills Up to 40% more energy-efficient than tank models. Your unit only fires when you turn on a tap — no more paying to keep 40 gallons hot 24 hours a day. Calgary homeowners see a real difference on their ATCO gas bill.
Built for Calgary Winters
Built for Calgary Winters Calgary’s incoming groundwater drops to 4–6°C in January. The Rinnai SENSEI® RX units we install are condensing, cold-climate rated, and sized to deliver strong flow even during Calgary’s coldest months.
Space-Saving & Modern
Space-Saving & Modern Wall-mounted and compact, a tankless hot water heater frees up the floor space your old tank was occupying. In Calgary homes where the utility room doubles as storage, that space matters.
Signs It's Time to Replace Your
Hot Water Tank with a Tankless Unit
Most Calgary homeowners wait until the tank floods the utility room. Don’t. These are the six signs that a tankless water heater upgrade makes sense — and the longer you wait, the more it costs.
The average hot water tank lasts 10–12 years in Calgary. If yours is approaching or past that mark, it's not a matter of if it fails — it's when. Replacing it on your terms is always cheaper than an emergency call at 6am.
Older tanks lose efficiency as sediment builds up in the bottom — the burner has to work harder to heat the same amount of water. If your gas bill has crept up without explanation, your water heater is a likely culprit.
Rust-coloured hot water is a sign your tank's interior lining has failed and the tank itself is corroding from the inside. Once this starts, the tank will fail — and often leaks before it's noticed. Time to replace.
If your family is regularly running out of hot water mid-shower or waiting 20+ minutes for it to recover, your tank is undersized for your current demand — or losing capacity as it ages. A tankless water heater in Calgary eliminates this permanently.
Loud noises from your hot water tank are caused by hardened sediment on the tank floor being burned by the burner. Calgary's hard water accelerates this. Heavy sediment buildup means the tank is working at reduced efficiency and is near end of life.
Any moisture, pooling, or dripping around your hot water tank is a red flag. Small leaks become major ones fast — and a failed tank can dump 40+ gallons of water into your utility room. If you see water, call us same day at (403) 399-7903.
Seeing any of these signs?
Don't wait for a flood. Get a same-day quote on a IBC tankless water heater installation in Calgary.
Calgary Rebates for Tankless Water Heater Installation
Installing a high-efficiency tankless water heater in Calgary may qualify you for utility rebates and government programs. Here’s what’s currently available for Alberta homeowners:
ATCO Gas Efficiency Rebate
ATCO Gas Efficiency Rebate ATCO offers rebates for qualifying high-efficiency water heating upgrades for Alberta homeowners. Condensing tankless units rated 0.90 UEF or higher — including the Rinnai SENSEI® RX at 0.98 UEF — typically qualify. Rebate amounts change periodically; visit atco.com for current program details or ask our team to confirm your eligibility when we prepare your quote.
ENMAX & EPCOR Home Efficiency Rebates
ENMAX & EPCOR Home Efficiency Rebates If your Calgary home is served by ENMAX or EPCOR, you may qualify for a utility rebate when replacing an older hot water tank or inefficient unit with a qualifying condensing tankless model. Program amounts and availability change seasonally — we’ll identify and confirm every rebate that applies to your specific install.
Canada Greener Homes Loan (Interest-Free)
Canada Greener Homes Loan (Interest-Free) The Canada Greener Homes Grant is closed to new applicants as of 2024. However, the Greener Homes Loan is still active — an interest-free loan of up to $40,000 for qualifying home energy efficiency upgrades, including tankless water heater replacement. Visit canada.ca/greener-homes for current eligibility and application details.
Just ask when you book your free consultation, we'll confirm what's available for your specific install.
Our Tankless Water Heater
Installation Process in Calgary
We’ve completed 500+ tankless water heater installations across Calgary. Every job follows the same five-step process — because doing it right the first time is faster than coming back to fix it.
Free In-Home Consultation
Our licensed technician assesses your gas line size, venting, water pressure, and your household's peak demand. We recommend the right Rinnai or Navien unit for your home and family size. No guesswork. No upselling.
Upfront Written Quote
You get a written quote covering everything: the unit, labour, venting, and any required gas line work. What we quote is what you pay. We schedule your install at a time that works for you — often same-day or next-day.
Professional Installation by Licensed Gas Fitters
Our licensed Calgary gas fitters remove your old unit, mount your new tankless water heater, connect gas and Category III venting, and set up the recirculation system if applicable. Clean, fast, done right.
Full Testing & Commissioning
Before we leave, we run the unit through a complete test cycle — verifying inlet pressure, flow rates, temperature output, and error codes. The job isn't done until your hot water runs exactly as it should.
Walkthrough, Warranty & Ongoing Support
We show you how to operate your new system, set your preferred temperature, and we register your manufacturer warranty on your behalf. Available after install — call us anytime at (403) 399-7903.
Same-Day & Next-Day Available
Most Calgary installs are completed in a single visit. Call us by noon and we’ll often have your new tankless water heater running the same day.
What Calgary Homeowners Are Saying
They were insanely good, they replaced both my tankless water heater and furnace, i can just say that they handle everything with care and i hope they will make millions by this business
Thank you again comfort union!
Exceptional service! Mohamed and his partner Daryl came even on Saturday just to finish installing our Tankless water heater. Ian the sales guy gave us advice and a good deal. Thumbs up guys!
The service is top notch! They contacted me very quickly and we had the water heater installed the next day. Mohammad is a professional and knows his job well, explained everything in detail and answered all our questions. We are looking forward to using your services again!
Honest, Trusted & Available Same-Day
As Calgary’s family-owned water heater installation company since 1995, we install Rinnai and Navien tankless units with industry-leading warranties — and we back every job with guarantees our competitors can’t match.
We guarantee your new tankless unit is correctly sized for your Calgary home's peak demand. If it can't meet your hot water needs, we make it right — at no cost to you.
The written quote we give you is the price you pay. No "we found something extra" calls. No line items added after the job. What we quote is final.
We treat every Calgary home like our own. We protect your floors, clean up completely, and leave your utility room cleaner than we found it.
We register your Rinnai or Navien manufacturer warranty on your behalf on installation day. You don't have to track a thing — it's done before we leave.
Every tankless water heater we install in Calgary meets or exceeds City of Calgary gas code requirements. We pull the permit, we pass the inspection.
Have a question after we leave? Call us. We're available 24/7 at (403) 399-7903. Comfort Union customers aren't forgotten after the invoice is paid.
Tankless Water Heater Installation FAQs
Everything Calgary homeowners ask us before booking.
How much does it cost to install a tankless water heater in Calgary?
Most Calgary homeowners pay between $2,800 and $5,500 fully installed. The range depends on the unit selected (Rinnai SENSEI® RX or Navien NPE-A2), whether a gas line upgrade is needed, and the type of venting your home requires. We provide a written, all-inclusive quote before any work begins — no surprises on installation day.
How much should a tankless water heater installation cost?
A fair all-in price for tankless water heater installation in Calgary is $3,000–$4,500 for most homes. If your gas line needs upsizing from ½” to ¾”, or your venting requires new Category III stainless runs, expect the higher end of the range. Be cautious of quotes under $2,500 — they often exclude gas line or venting work that is required for a safe, code-compliant install in Calgary.
What rebates are available for tankless water heaters in Calgary?
Calgary homeowners may qualify for rebates through ATCO Gas, ENMAX, or EPCOR for installing a high-efficiency condensing tankless unit (0.90+ UEF). The Canada Greener Homes Loan — an interest-free loan up to $40,000 — is also available for qualifying upgrades. Note: the Canada Greener Homes Grant is closed to new applicants as of 2024. Ask our team when booking and we’ll confirm every rebate that applies to your install.
How much does a tankless water heater cost in Alberta?
In Alberta, tankless water heater unit costs range from $1,200 to $2,500 depending on brand, BTU capacity, and whether recirculation is included. Fully installed in Calgary, most homeowners spend $2,800–$5,500. Alberta costs are consistent with this range — there are no additional provincial surcharges on equipment or gas fitting labour.
How long does tankless water heater installation take in Calgary?
A straightforward replacement install — swapping an existing tankless or tank unit — typically takes 3–5 hours. If a gas line upgrade or new venting run is required, allow 5–8 hours. Our team completes most installs in a single visit, and we offer same-day and next-day scheduling across Calgary.
Which is better — Rinnai or Navien for a Calgary home?
Both are excellent condensing brands and we stand behind both. The Rinnai SENSEI® RX leads on efficiency at 0.98 UEF and carries a 15-year heat exchanger warranty — it’s our most-installed tankless water heater in Calgary. The Navien NPE-A2 is the #1 selling condensing tankless brand in North America and performs exceptionally in large homes and high-demand applications. We’ll recommend the right fit during your free consultation.
Do I need a permit for tankless water heater installation in Calgary?
Yes. In Calgary, a gas permit is required for any gas appliance installation, including tankless water heaters. Comfort Union handles the permit application on your behalf as part of the installation process — it’s included in our quote, not an add-on.
Can a tankless water heater handle Calgary's cold winters?
Yes — if it’s properly sized. Calgary’s incoming groundwater temperature drops to approximately 4–6°C in January and February, which reduces a unit’s maximum flow rate compared to warmer climates. We size every unit to your home’s actual peak demand accounting for Calgary’s winter groundwater temperatures. Both the Rinnai SENSEI® RX and Navien NPE-A2 are rated for Canadian cold-climate performance.
How long does a tankless water heater last?
A well-maintained tankless water heater lasts 20+ years — roughly double the lifespan of a traditional hot water tank. The biggest factor in Calgary is annual descaling maintenance. Calgary’s hard water causes mineral buildup in the heat exchanger over time, and annual flushing is the single most effective way to get the full lifespan out of your unit.
Can I replace my hot water tank with a tankless unit in Calgary?
Yes — and it’s one of the most common installs we do. In most Calgary homes, replacing a tank with a tankless unit requires upsizing the gas line from ½” to ¾” to handle the higher BTU demand of a condensing unit. Many homes also need new PVC or stainless venting. We assess your existing setup completely during your free consultation and include all required work in your written quote — nothing is left out.
Tankless Water Heater Installation Across All of Calgary
We install and service tankless water heaters in every corner of Calgary. Same licensed team. Same upfront pricing. Same family-owned service — no matter which quadrant you’re in.
Tankless Water Heater Install NW Calgary
Tuscany, Royal Oak, Scenic Acres, Hawkwood, Edgemont, Varsity, Dalhousie, Montgomery, Bowness and all NW communities.
Tankless Water Heater Install NE Calgary
Skyview Ranch, Saddle Ridge, Martindale, Taradale, Temple, Pineridge, Rundle, Marlborough and all NE communities.
Tankless Water Heater Install SW Calgary
Signal Hill, West Springs, Aspen Woods, Cougar Ridge, Springbank Hill, Pump Hill, Lakeview, Glamorgan and all SW communities.
Tankless Water Heater Install SE Calgary
Auburn Bay, Mahogany, Cranston, McKenzie Towne, Copperfield, New Brighton, Douglasdale, Riverbend and all SE communities.
Ready for Endless Hot Water in Calgary?
Free In-Home Assessment
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