Material decision card
Tankless Water Heater
On-demand heating with no storage tank. Roughly double the installed cost of a tank because it usually needs gas line, venting or electrical service upgrades, and it needs annual descaling in hard water.
Verified August 2026
Is tankless water heater worth it?
18–25 year service life
Best for: Households with unlimited hot water demand and space constraints. Maintenance is moderate and durability rates 4/5.
Decision card
| Service life | 18–25 years |
|---|---|
| Maintenance | Moderate |
| Durability | 4 / 5 |
| DIY difficulty | 5 / 5 (5 = hardest) |
| Warranty | 12-15 year heat exchanger |
| Relative installed cost | 190% of the typical job |