Quick takeaways
- Tankless costs 2-3x upfront but lasts 2x as long and uses 25-35% less gas.
- Tank wins if you only use hot water for 1-2 fixtures at a time and have low upfront budget.
- Tankless wins if you have 3+ bathrooms, take long showers, or hate running out.
- In Kanata water, both need annual maintenance (sediment flush for tanks, descale for tankless).
Upfront cost
A standard 50-gallon gas tank water heater installed in Kanata runs $2,000-2,900 all-in. A like-for-like tankless install (typically a Navien NPE-240A or Rinnai RU199i) runs $4,200-5,800 — more if venting needs to be rerouted or gas line upsized.
Lifetime cost
Tanks last 10-13 years in Kanata water. Tankless lasts 18-22 years with annual descaling. Tankless uses about 25-35% less natural gas. Over 20 years, tankless typically comes out $1,500-3,000 ahead even accounting for the higher upfront and descaling cost.
Which one suits your household
Tankless is the better choice if any of these apply: you have 3+ bathrooms; multiple teenagers; you take long showers; you ever run out of hot water now; you have room in the venting/gas budget for the upfront premium.
Tank still makes sense if: you have a small household; tight upfront budget; awkward venting situation that would balloon tankless install cost; rental property where you won't see the long-run savings.
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