New Delhi, Jan. 13 -- Small bathrooms come with very real limitations. Wall space is tight, ventilation is often poor, and every fixture needs to earn its place. In such settings, an instant water heater is often seen as a convenient solution, but convenience alone is not enough. Performance, safety, usability, and suitability for compact spaces matter far more than brand names or flashy features.

Instant water heaters work differently from storage models. They heat water only when required, delivering hot water on demand without storing it in a tank. For small bathrooms, this design can be both an advantage and a challenge. What matters is not the promise of instant hot water, but how reliably and safely the heater performs within limit...