Havells Instanio 3L Instant Water Heater vs Symphony Diet 12T 12-Litre Personal Tower Air Cooler
What separates them
These two differ on 9 recorded specifications. The Symphony Diet 12T 12-Litre Personal Tower Air Cooler is ₹2,000 dearer. They are different kinds of product — instant water heater against personal tower evaporative air cooler — so read the table as two spec sheets rather than a like-for-like.
Havells Instanio 3L Instant Water Heater vs Symphony Diet 12T 12-Litre Personal Tower Air Cooler
Havells
Havells Instanio 3L Instant Water Heater
₹4,290
A 3 litre instant heater suits a kitchen sink or washbasin, not a shower. It heats on demand so there are no standing losses, but the small capacity cannot sustain the flow rate a shower needs.
Full details →
Symphony
Symphony Diet 12T 12-Litre Personal Tower Air Cooler
₹6,290
Evaporative cooling costs about a tenth of what an air conditioner costs to run, and the reason is that it does not remove heat -- it converts sensible heat into humidity.
Full details →Who the Havells Instanio 3L Instant Water Heater is for
Buy it if: Kitchen sinks and washbasins needing hot water on demand without a stored tank.
Avoid it if: Anyone needing hot water for showering, who should choose a 15 litre or larger storage heater.
Who the Symphony Diet 12T 12-Litre Personal Tower Air Cooler is for
Buy it if: Anyone in dry inland heat wanting cooling at roughly a tenth of an air conditioner's running cost.
Avoid it if: Anyone in Mumbai, Chennai, Kolkata or any coastal humidity -- evaporative cooling does not work in damp air.
Specifications, side by side
9 of 17 rows differ. Differences first.
| Specification | Havells Instanio 3L Instant Water Heater | Symphony Diet 12T 12-Litre Personal Tower Air Cooler |
|---|---|---|
| Price | ₹4,290 | ₹6,290 |
| Annual energy use | Varies with usage; no standing loss | Roughly 110 kWh a season at 8 hours a day for 90 days, about Rs880 -- against roughly Rs9,000 for a 1.5 ton air conditioner over the same period |
| BEE star rating | Not rated | Not rated -- BEE does not cover evaporative coolers |
| Capacity | 3 litres | 12 litre tank, rooms up to about 10 square metres |
| Dimensions | 30 x 22 x 22 cm | 30 x 30 x 84 cm |
| Installation | Wall mounted | Free standing, needs an open window |
| Noise level | Not applicable | About 52 dB |
| Rated power | 3000 W | 185 W |
| Warranty | 2 year product, 5 year tank | 1 Year Official Brand Warranty |
| Weight | 4 kg | 7.5 kg |
| BEE rating year | Not applicable | Not applicable |
| Air throw | not published | About 6 metres |
| Cooling method | not published | Evaporative -- water absorbs heat as it evaporates, which also adds humidity |
| ISEER | not published | Not applicable |
| Refrigerant | not published | None -- water evaporation |
| Ventilation | not published | Requires an open window; a sealed room becomes humid and uncomfortable |
| Where it does not | not published | Coastal humidity. In Mumbai or Chennai it adds moisture to already saturated air and provides little cooling |
| Where it works | not published | Dry heat. In Delhi or Jaipur in May it works well |
Every row is a figure one or both products record. A blank is a figure the catalogue does not hold, not a zero.
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