The geyser decision is simpler than the aisle makes it look: one question — how do you bathe? Bucket or shower. Everything follows from that.
The core difference
Storage geysers (10-25L) heat and hold a tank of water — comfortable flow rates, any tap, but standby losses. Instant geysers (1-3L) heat water as it flows — no storage losses, tiny size, but limited flow rate: one tap at a time, and pressure-sensitive.
Bucket bath vs shower math
Bucket bath needs ~15-20L warm water per person: a 15L storage unit handles one person comfortably, two with recovery time. Showers consume 40-60L warm water — instant geysers can't keep up (lukewarm trickle); you want 25L storage or a strong 15L with fast recovery.
Running cost reality
Instant geysers win on paper — no standby losses, only-when-needed heating. But a 5-star storage geyser's insulation is good enough that daily-bath families see modest differences. The bigger cost lever is the star rating and BEE label, not the type.
| Factor | Storage (15-25L) | Instant (1-3L) |
|---|---|---|
| Bucket bath | ★★★★★ | ★ |
| Shower | ★★★★ (25L) | ✗ |
| Two bathrooms back-to-back | ★★★★ (25L) | ✗ |
| Kitchen sink / single use | Oversized | ★★★★★ |
| Wall space | Significant | Tiny |
| Typical price | ₹6-12K | ₹2.5-4.5K |
The verdict
Bucket-bath families: 15L 5-star storage (the Indian default). Shower households: 25L storage. Kitchen sink or a single quick-rinse user: a 3L instant, done.
Our picks
8-year tank warranty, glass-lined
Fast recovery, 3-level safety
High-pressure rated for high-rises
FAQs
Does an instant geyser really save electricity?
For light, occasional use — yes, meaningfully. For two people's daily bucket baths, the gap narrows to nearly nothing; buy on comfort instead.
How long does a geyser last?
7-10 years. The tank is what fails (corrosion) — which is why the tank warranty (AO Smith: 8 years) should drive the purchase.