Updated November 1, 2026 · Reviewed for accuracy by a licensed Uniform plumber before publication
Southwest Florida's warm groundwater means water heaters work less than in colder states. That changes the math a little, but the main questions are the same: how much hot water you use at once, what fuel you have, and where the heater goes.
| Tank | Tankless | |
|---|---|---|
| How it works | Keeps a tank of water hot | Heats water as it flows |
| Hot water supply | Limited by tank size and recovery | Continuous, limited by flow rate |
| Upfront cost | Generally lower | Generally higher, especially if gas or electrical upgrades are needed |
| Energy use | Loses some heat while standing | No standby loss; efficiency depends on model |
| Space | Large footprint | Wall-mounted, compact |
| Maintenance | Flush sediment; check anode | Descale regularly, especially with hard water |
| Fuel | Electric or gas | Usually gas; electric tankless often needs major electrical capacity |
When a tank makes sense
- Electric-only homes without spare electrical capacity
- Replacing like-for-like quickly after a failure
- Modest hot-water use and a lower upfront budget
When tankless makes sense
- Homes with gas service and high simultaneous use (several showers, large tubs)
- Limited space or a desire to free up a closet
- Owners who will keep up with descaling
Installation details people miss
Gas tankless units need proper venting and an adequately sized gas line. Tank replacements may need a drain pan, expansion tank or updated relief-valve piping to meet code. In many jurisdictions both require a permit. We include these in the written estimate so there are no surprises.