Tankless water heaters have a few drawbacks — higher up-front cost, potential limits on simultaneous high-flow demand (multiple showers + dishwasher), the need for annual descaling in hard-water areas, and possible gas-line or electrical upgrades during install. The right unit sized correctly avoids most of these.
Trade-offs to consider
- Higher equipment and install cost
- May need gas-line upsize or 120A electrical service
- Annual descaling required for warranty
- Capacity limits if undersized for peak use
- Cold-water sandwich on quick on/off cycles (modern units minimize this)
We size for your peak demand and walk through every trade-off in advance. See our tankless water heater service.
