Certified Tankless Installers Endless Hot Water, Valley-Wide

Hot Water On Demand Services Across the Okanagan

Tankless water heater installs, retrofits, and service across 11 Okanagan communities — properly sized, gas-upgraded where needed, and commissioned to manufacturer spec.

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Tankless Specialists Across the Valley

Hot Water That Doesn't Run Out — Installed Right

The pitch for tankless is simple: endless hot water, a fraction of the floor space, and lower standby energy losses than a 60-gallon tank running around the clock. The reality is more specific. A tankless only delivers on those promises when it's sized correctly for peak demand, has adequate gas supply, vents properly, and gets maintained for Okanagan hard water. Done right, it transforms how a household uses hot water. Done wrong, it's an expensive appliance that throws error codes and short-showers everyone.

We install tankless systems across 11 Okanagan and Shuswap communities — from newer Kelowna Mission and Vernon Turtle Mountain builds with ample gas supply and clean utility rooms, to retrofit installs in older East Hill or Salmon Arm Hillcrest homes that need gas line upgrades before a tankless will run at full output. Our quotes cover every piece of the job — including the ones other installers forget about until they're onsite and the unit is already unboxed.

Tankless installs (natural gas & propane)
Whole-home sizing & BTU calculations
Gas line upgrades for tankless capacity
Proper venting (sidewall & roof)
Tank-to-tankless retrofits
Commissioning & warranty registration

What We Handle

Tankless Services Across the Okanagan

New Tankless Installs

Sized to your household's actual peak demand, with gas supply and venting planned properly from day one. Not a plug-and-play swap — a real install done right.

Tank-to-Tankless Retrofits

Replacing an aging tank with a tankless usually requires a larger gas line and new venting. We scope and price the full job up front — no surprise change orders.

Whole-Home Sizing

Tankless units are rated at a GPM at a given temperature rise. Okanagan winter inlet temps change the math. We size for realistic winter performance, not summer specs.

Outdoor Kitchen & Hot Tub Supply

Dedicated tankless units for pool houses, outdoor showers, and hot tub top-ups around Okanagan Lake, Shuswap Lake, and Kalamalka lakefront properties.

Suite & Secondary Tankless

Separate tankless units for basement suites and carriage houses so the main home's hot water isn't shared, overdrawn, or billed to the wrong unit.

Commissioning & Registration

We register each unit with the manufacturer so your warranty is actually valid from day one — not void because no one filed the paperwork on install day.

How It Works

A Tankless Install Done Right

Household Demand Review

How many fixtures run at once? What's the morning peak? Hot tub or large soaker tub? We ask the questions that determine the right BTU rating for your actual use.
Gas Line & Venting Assessment

Most tankless units need a 3/4" gas line minimum, sometimes 1". We check what you have and scope any upgrade needed before the quote, so nothing changes on install day.
Written Quote

Unit, gas line upgrade if needed, venting, condensate drain, electrical, and commissioning — itemized. You know every number before we start ordering equipment.
Clean Installation

We run lines cleanly, mount the unit level, handle venting to manufacturer and code spec, and tie in the condensate drain properly. Tidy install, no improvisation.
Commissioning & Walkthrough

We flow-test at every fixture, register the warranty, and walk you through temperature settings and annual maintenance requirements.

Why Stevenson

Why the Okanagan Picks Us for Tankless

We Size for Winter

Okanagan January inlet water is cold. We size at winter delta-T, not summer, so your tankless actually keeps up when the family is home and showers are stacked back-to-back.

Gas Work In-House

Most tankless retrofits need a gas line upgrade. Our licensed gas fitters handle it — no second contractor, no scheduling dance, no finger-pointing on warranty calls.

Hard Water Planning

We pair tankless installs with a water softener recommendation when the test warrants it. Skipping this is the single biggest reason Okanagan tankless units fail early.

Service After Install

We flush, descale, and service what we install. Tankless needs annual care in this water — we make it easy to book and stay on a schedule.

Available Locations

Hot Water On Demand Services in Your Community

Common Questions

Hot Water On Demand FAQ

Will a tankless really give me endless hot water?

Yes — as long as it's sized for your household's peak demand. Undersized, and simultaneous showers will drop flow or temperature. Proper sizing is the whole game; the unit itself is secondary.

How much does a tankless install cost in the Okanagan?

Wide range — unit cost is only part of it. Gas line upgrades, venting, and condensate routing often add $1,500–$4,000 to a tank-to-tankless retrofit. We quote the full job so there are no mid-install surprise charges.

Will my existing gas line support a tankless?

Often no — especially in older homes across Vernon, Kelowna, and the North Okanagan. Most tankless units need a 3/4" line, sometimes 1". We assess during the quote and price the upgrade as part of the scope.

Do I still need to service a tankless?

Yes — annually, minimum, in the Okanagan. Hard water scale builds up in the heat exchanger and kills efficiency and lifespan. An annual flush is non-negotiable if you want 20+ years out of the unit.

How long does a tankless last vs. a tank?

Well-maintained tankless units run 20+ years. Standard tanks average 8–12 in Okanagan water. Tankless costs more up front, but the lifespan math often favors it over a full ownership cycle.

Can a tankless handle a large soaker tub?

Yes, if sized correctly. We'll calculate GPM at your required temperature rise and confirm whether one unit fits, or whether a multi-unit install makes more sense for your household demand.

Customer Reviews

What Stevenson Mechanical Customers Say

4.8 Based on 22 Google reviews

Chelsea Harrop

Shadd and his team are absolutely wonderful and did a great job. I needed a basement sink plumbed and new washer dryer hookups and they were able to get it done in short order, kept everything tidy and were super easy to deal with. They knew my budget and worked with me to stay within it and gave me everything I needed. They are very professional, skilled and their prices are more than reasonable. I would highly recommend them to everyone!

Chris' Integra Tire Auto Centre

HIGHLY RECOMMENDED BY US! 4 weeks ago, our hot water and air conditioning quit working on the same day! I called and spoke with the AMAZING Denise, she had Alex out at our shop within the day and he had everything diagnosed and parts ordered, not long after the first appointment, he had our hot water back in working order and then our A/C was repaired after that! Anytime we have had any issues, they have been very prompt to show up on the same day and Alex fixed it all! Such amazing and friendly services! You all have a forever client with Integra Tire and our team moving forward! Thank You!

Arthur Enns

Plumbing problems are never fun, but we appreciated how Stevenson Mechanical handled the replacement of our sump pump --from booking the appointment to the on-time arrival of our plumber and his friendly, competent service (which included persevering through some unexpected issues). Thank you for your expertise and excellent service!

Margo Pepper

Called just before noon, on a Friday, at 1:40 plumber arrived and fixed problem in 15 minutes. Very nice young man. I will be calling back soon for some quotes on other needs. Thank you so much to the receptionist for reaching out to staff and arranging such prompt service. Today had old gas fireplace removed. Yet again outstanding service, owner came to assist very quickly. Answered all my questions. Thanks guys.

Christine Allen

This company is great! We needed to have our air conditioning unit disconnected and moved temporarily as we were getting our backyard patio redone. They were able to accommodate our last minute request, they completed the work quickly and got our unit reconnected just in time to beat the heat ! I would highly recommend them!

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Stevenson Mechanical provides expert service across the North Okanagan. Contact us for a free quote. No pressure, no hidden fees.