Here’s the punch line. Buying distilled water is usually more expensive than purified water—despite being simpler to make.
Why? Because distilling takes forever and uses a ton of energy. Boiling water for hours is not cheap. Your electric bill will cry.
Purified water is cheaper and faster to produce. That’s why your grocery store has a whole wall of it—and one tiny sad shelf of distilled water.
Funny detail: some people buy distilled water just to fill their humidifiers. They think it’s fancy. Nope, it’s just science people being practical.