Water heaters
Water Heater Replacement in the GTA: Tank or Tankless?
When to repair vs replace a water heater in Toronto, what tank and tankless installs cost in the GTA, and how to choose for a Canadian winter.
A typical tank water heater lasts 8–12 years; if yours is in that window and misbehaving, replacement usually beats repair. In the GTA, replacing a tank water heater runs about $500–800 in labour, while going tankless runs $900–1,500 in labour — plus the unit itself in both cases. Repairs, by comparison, run $175–400. The math is simple: a $300 repair on a 10-year-old tank is often money spent twice, because the tank itself is near end of life.
How do I know my water heater is failing?
Rusty or metallic-tasting hot water, rumbling or popping sounds (sediment boiling at the bottom of the tank), water pooling around the base, and hot water that runs out noticeably faster than it used to. Any actual leak from the tank body — not a fitting — means the tank is done; tanks don't heal.
Tank or tankless for a Toronto home?
A tank is cheaper up front, simpler, and fine for most households. Tankless heats water on demand, never runs out, takes a fraction of the space, and sips gas when idle — but costs more to install, especially if your home needs a gas line upgrade or new venting, which many older GTA homes do. One honestly Canadian consideration: incoming water in a Toronto winter is very cold, which reduces a tankless unit's flow rate — a unit sized for a Vancouver winter can disappoint here in February. Size it for winter groundwater temperature, not the brochure number; a good installer will do exactly that without being asked.
Should I rent or buy?
Renting a water heater is common in Ontario in a way it isn't almost anywhere else, and the convenience is real — but so is the lifetime cost, which typically exceeds buying the same unit several times over, and rental contracts can complicate selling your home. If you're already paying a monthly rental on a heater that's a decade old, a replacement quote is worth having just to see the comparison.
Frequently asked questions
Can I replace a water heater myself? Gas water heaters: no — gas connections and venting are licensed work, and that's not the corner to cut. Electric: still not recommended; between the plumbing, the electrical, and code requirements, this is a pro job.
How long does replacement take? A like-for-like tank swap is usually 2–4 hours. Tank-to-tankless conversions take longer — often a full day — because of venting and gas line changes.
What temperature should my water heater be set to? 60°C in the tank to prevent bacteria growth, with anti-scald mixing at the tap if you have young kids or older adults at home.
No hot water, or a tank past its birthday? We'll connect you with a GTA plumber who can quote both options — request a plumber or message us on Facebook. Free for homeowners, care of GetFixHero.
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