Tankless Water Heater Installation: Is Endless Hot Water Right for Your Home?

Jack Japuncic • June 6, 2026

Written by the team at KCs Plumbing, Heating & Drain Services · Reviewed by Jack Japuncic, Master Plumber

If you've ever been the last person in line for a shower and found nothing but lukewarm water, the idea of a tankless system is appealing. Endless hot water, on demand, in a unit small enough to hang on a wall. It's a genuinely good technology. It's also not automatically the right choice for every home, and you deserve an honest picture before you spend the money, not just the sales version.

How Tankless Actually Works

A conventional tank keeps 40 or more gallons of water hot at all times, ready and waiting, reheating around the clock whether you use it or not. A tankless system skips the storage entirely. Open a hot tap, and water flows through the unit to be heated on the spot by a powerful burner or element, then keeps flowing as long as you need it. No tank, no standby reheating, no running out.

What's Genuinely Better, and What Isn't

The advantages are real: hot water that doesn't run out, so back-to-back showers and a running dishwasher stop being a scheduling problem. Space back, since a wall-mounted unit frees up the floor a bulky tank used to occupy, useful in a townhouse, condo, or compact utility room. Lower energy use, because you're not paying to keep a tank of unused water hot all day. And well-maintained tankless units commonly outlast tank heaters by a wide margin.

Here's the part that doesn't make it into most sales pitches. Tankless is a weaker choice when a perfectly good tank was just installed, when the home's gas or electrical service would need extensive upgrading to support it, or when the budget is tight and a straightforward tank replacement solves the actual problem. We'd rather tell you a tank is the smarter call for your situation than sell you a unit you didn't need.

Converting From a Tank: Where the Surprises Live

Switching from a tank to tankless is more than swapping one box for another. A tankless unit demands a lot of energy in a short burst, which usually means gas line resizing (tankless units fire at a much higher rate than a tank), new venting (they vent differently than a standard tank), electrical work (even gas units need power for their controls, and electric tankless units can need serious capacity), and mounting and water line adjustments to do the install cleanly. None of this is a reason to avoid tankless, it's why a proper assessment matters before you commit to a number, and why the gas portion of this job legally has to go through a licensed gas fitter in BC.

What It Costs, and Why the Number Isn't Fixed

Tankless water heater installation generally costs more upfront than a like-for-like tank replacement, the equipment is more advanced and the install more involved, particularly on a conversion. What you're buying is endless hot water, lower running costs, and a longer-lasting system. Because the final price depends heavily on your home's existing gas, venting, and electrical setup, an honest number comes from an assessment, not a quote given over the phone. Our rates page is a reasonable starting point for scale.

Frequently Asked Questions

Is a Tankless Water Heater Worth It?

For many households, yes — especially if you run out of hot water, want space back, or plan to stay in the home long term. For others, a quality tank remains the better value. It depends on your home and habits.

Can I Replace My Hot Water Tank With a Tankless Unit?

Usually yes, but it's a conversion rather than a swap. Expect possible gas line resizing, new venting, and electrical considerations, confirmed by a proper assessment.

Do Tankless Water Heaters Really Never Run Out?

A correctly sized unit delivers continuous hot water for normal household demand. Matching the unit to peak usage is part of doing the job right, an undersized unit will disappoint you.

Gas conversions in BC legally require a licensed gas fitter, and we handle every part of that in-house. If you want an honest answer on whether tankless makes sense for your specific home, rather than a sales pitch either direction, call (604) 873-3753 or request a consultation and we'll size it up properly.