Tankless Water Heater Installation: A Smart Investment for Burlington Homes

Published July 12, 2024 · Mountain Grove Plumbing & Drains

Tankless water heaters have moved from a premium option to a mainstream choice for Burlington homeowners replacing aging tank units. The technology is mature, the installation process is well-understood, and the long-term economics are compelling. This article explains what a tankless installation involves, what it costs, and who benefits most.

How Tankless Water Heaters Work

A tankless (on-demand) water heater heats water as it flows through the unit. When you open a hot tap, cold water enters the heater, passes over a heat exchanger (fired by gas burners or electric elements), and exits at your target temperature — typically within a few seconds of opening the tap. When the tap closes, the burners shut off. There's no stored water to keep hot, so there's no standby heat loss.

Benefits for Burlington Homeowners

• Endless hot water: No tank to exhaust. Multiple showers, a dishwasher, and a laundry load running simultaneously won't drain a tankless unit the way they drain a 50-gallon tank.
• Energy efficiency: No standby heat loss means 20–30% energy savings compared to a conventional tank for most households.
• Longer lifespan: Tankless units typically last 15–20 years versus 10–13 for tank heaters. The long-term cost-per-year often favours tankless despite the higher upfront price.
• Space savings: A tankless unit mounts on the wall and occupies a fraction of the footprint of a tank heater — particularly relevant for Burlington homes with finished basements where the utility space is limited.
• Better water quality: No stored water sitting in a tank means no sediment accumulation and no metallic taste from an aging anode rod.

What Installation Involves

Installing a tankless unit is more involved than a standard tank swap. Key considerations:

Gas Line Sizing

High-efficiency condensing tankless units require a larger BTU input than conventional tank heaters — typically 150,000–199,000 BTU vs. 36,000–45,000 BTU for a tank. Many Burlington homes have ½-inch gas lines serving their current heater. Upgrading to ¾-inch or 1-inch for a tankless unit is often necessary, which adds to the installation cost but is straightforward for a licensed gas fitter.

Venting

Condensing tankless units use PVC venting — a significant advantage, as it can run horizontally and exits through the wall rather than requiring a vertical flue. This makes them much easier to locate in a finished basement than a tank heater with a B-vent chimney. Older homes in Burlington that are replacing a tank heater with an existing chimney flue often find this liberating — the unit can go wherever the gas line and a wall penetration allow.

Cold Water Temperature

Ontario incoming water temperatures average 6–8°C in winter, which requires a significant temperature rise to reach 49°C (the standard delivery temperature). A unit rated for warmer climates may underperform in Burlington winters. We specify units appropriate for Canadian cold-water conditions and factor this into flow rate recommendations.

Costs in Burlington (2024)

An all-in tankless installation in Burlington — unit, labour, gas line work if needed, PVC venting, permit, and removal of the old heater — typically runs $2,500–$4,500 depending on the gas line situation and unit selected. A straight like-for-like tank replacement runs $900–$1,800 all-in. The upfront premium for tankless is real; the 20-year total cost of ownership often narrows or reverses the gap when you account for energy savings, the longer unit lifespan, and avoided water damage from tank failure.

Who Benefits Most

Tankless makes the strongest case when: you have a large household with high simultaneous hot water demand; you have a small utility space where the tank footprint is a problem; you're planning to stay in the home for 10+ years (you need the full lifespan to recoup the upfront premium); or you're replacing a failing unit and want to avoid another replacement in 10 years. It makes less sense for smaller households with very low hot water demand — a well-sized efficient tank may have a lower total 10-year cost in those cases.

Maintenance

Burlington's municipal water has moderate hardness. Tankless units should be flushed with a descaling solution annually to remove mineral deposits from the heat exchanger — otherwise flow rate drops and efficiency decreases. This is a 30–45 minute service call and is the primary maintenance requirement. We can schedule annual descaling as part of a service agreement.