HouseChalk
Tankless water heater
A tankless water heater heats water on demand as it flows through the unit, without storing hot water in a tank.
Why it matters
Tankless units can save energy by not heating stored water. They never run out of hot water, but flow rate can limit simultaneous uses.
Where people get this wrong
Tankless does not mean instant. There is still a delay as cold water in the pipes is pushed out. Gas tankless units need proper venting and gas line sizing.
Real-world example
A family upgrades to tankless. Showers never run cold, but running two showers and the dishwasher at once slows the flow. Understanding capacity matters.
Where this hits your build
This comes up during rough-in and final fixture installation. Accessibility for future repairs matters as much as the initial install.
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