Water heater replacement is one of our most common calls. The #1 question: tank or tankless?
Tank Water Heaters
How they work: A large tank (40–60 gallons) keeps water hot 24/7, ready when you need it.
Cost in Calgary: $900–$1,800 installed.
Pros: Lower upfront cost, simple to install and repair, works fine for most families, no issues with cold weather performance.
Cons: Standby heat loss (paying to keep water hot 24/7), runs out during high demand, lifespan of 8–12 years, takes up significant space.
Tankless Water Heaters
How they work: Heats water on demand as it flows through the unit. No tank, no standby loss.
Cost in Calgary: $2,200–$3,500 installed.
Pros: Never runs out of hot water, 20–25% more energy efficient, lifespan of 15–20 years, space-saving wall mount.
Cons: Higher upfront cost, may require gas line upgrade, more complex to service.
Which Makes Sense for Your Home?
Go tank if: Tight budget, standard family (1–2 bathrooms), want simplicity.
Go tankless if: Larger home, frequently run out of hot water, plan to stay 10+ years, want maximum efficiency.
Our Most Common Recommendation
For a typical Calgary home with 2–3 bathrooms and a family of 3–4, we usually recommend a **50-gallon high-efficiency tank** as the cost-effective choice, or a **mid-size tankless unit** if budget allows and you plan to stay long-term.
DMS installs both. Call 403-619-6614 for a free quote and honest recommendation based on your home.
Owner of DMS Plumbing & Heating, serving Calgary with honest, expert plumbing and heating services.
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