Tankless water heater vs. tank water heater
August 2026 · Bloomington Water Heaters
We install both every week, so we have no horse in this race. The honest answer: tanks win on upfront cost and simplicity, tankless wins on lifespan, floor space, and never running out. Which one wins for you comes down to four questions.
Question 1: How long are you staying?
Tankless pays back through lifespan and lower gas use, and that takes years. Staying five or more? The math usually favors tankless, one unit outlives two tanks. Selling within two or three years? Put in a tank; buyers don’t pay a premium that covers the difference.
Question 2: Do you actually run out of hot water?
If nobody in your house has ever taken a cold shower because someone else got there first, a properly sized tank is serving you fine and endless hot water is a solution without a problem. If your evenings involve shower scheduling, or the tub never quite fills hot, that’s the exact problem tankless erases.
Question 3: What shape is your gas line in?
This is the hidden variable in every conversion quote. A tankless burner needs a lot of gas at once, most Bloomington homes need the branch line upsized, which is included in our conversion range. Homes with modern gas service (Renwick, Winslow Farms, most 2000s builds) convert cheapest; a 1920s Elm Heights basement can be done, it just sits at the higher end.
Question 4: Does the standby cost bother you?
A tank keeps 50 gallons hot around the clock whether you’re home or not, that’s the 20–30% a tankless unit saves. On a typical Bloomington gas bill it’s real but not life-changing money; call it a nudge toward tankless rather than the reason. The bigger financial argument is lifespan: 20+ years versus a tank’s 10–12.
Our honest recommendation
Household of 1–2 with a working setup: replace tank with tank and keep the extra $2,500. Household of 3+ that fights over hot water and plans to stay: convert, it’s the upgrade people thank us for a year later. Not sure which you are? Call and describe your house; we quote both numbers in the same call and we genuinely don’t care which one you pick.
The comparison, side by side
| Tank | Tankless | |
|---|---|---|
| Installed cost | $2,200 – $2,800 | $4,500 – $6,000 |
| Lifespan | 10–12 years | 20+ years |
| Hot water supply | 40–50 gallons, then a wait | Endless, within flow rating |
| Energy use | Keeps water hot 24/7 | Heats only on demand (~20–30% less) |
| Space | Closet or corner of the floor | Suitcase-sized, on the wall |
| Maintenance | Occasional flush | Annual descaling flush |
| Install time | 2–3 hours | 4 hours – 1 day |
Installed prices are our current Bloomington ranges; lifespans assume Bloomington’s moderately hard water with basic maintenance.