Description
Rated to 8 Bar. Built for High-Rise Flats.
3 kW Instant Heating · 5 Star · Vertical Mount · Black.
Hot water in moments for kitchen and bathroom — no tank to preheat, no waiting · an 8 bar pressure rating that suits high-rise buildings where overhead tank pressure defeats ordinary geysers · 5 star rated · compact vertical body at just 3 kg · 5 years on the tank, 2 years on the product, with on-site warranty service
This is the specification most people never check, and the one that decides whether a geyser survives in a tall building. In a high-rise, water arriving from an overhead tank many floors above carries serious pressure — and a geyser rated for a low-rise home simply isn't built to contain it, which is how tanks split and warranties get voided. A rating above 8 bar is what makes a unit genuinely suitable for high-rise installation. If you live in a tower in Dwarka, Noida or Gurugram, or anywhere the tank sits several floors overhead, this is the number to look for. Ask us if you're unsure — we'll check your building before you buy.
Instant heating at 3 kW — hot water when you ask, not when it's ready
A storage geyser keeps 15 or 25 litres hot all day so that it's ready when you want it — which means paying to heat water you mostly don't use, and waiting when the tank runs cold. An instant geyser inverts that entirely: 3 kilowatts of heating power raise water to temperature on demand, in the moment you open the tap. Nothing is stored, so nothing is wasted on standing heat loss, and there's no cold-tank wait if two people need hot water in quick succession. For a kitchen sink, a basin, or a bathroom used by one or two people, it's simply the more sensible arrangement — and the 5 star rating reflects exactly that efficiency.
Compact, vertical, and black
At 20 × 30 × 17 cm and just 3 kg, this mounts almost anywhere — above a kitchen sink, beside a basin, on the narrow strip of wall where a storage geyser would never fit. The vertical format suits tall wall spaces specifically, which is exactly the shape of wall most modern bathrooms leave free. And the black finish is a genuine change from the usual white cylinder: understated, contemporary, and considerably better suited to a dark-tiled modern bathroom than a glossy white box bolted above the door.
🏠 Where a 3-litre instant geyser earns its place
Kitchen Sink
Instant hot water for greasy utensils through the winter months
Modern Bathrooms
Compact vertical mounting designed for contemporary bathroom walls
Tower Flats
The 8 bar rating handles overhead-tank pressure in tall buildings
Guest Bathroom
A second point of hot water without major plumbing work
📜 What the warranty actually covers
Tank — 5 Years
Five years of cover on the tank, the part that decides a geyser's lifespan
Heating Element
The element is covered too, not just the tank shell
Product — 2 Years
Two years of overall product warranty alongside the tank cover
On-Site Service
Service comes to you — no uninstalling and carrying it to a centre
On-site warranty service is the detail worth noting on a wall-mounted appliance — it means an engineer visits rather than you dismounting a plumbed-in geyser and transporting it.
📦 In the box
Physical damage isn't covered under warranty, so it's worth having the unit mounted properly by a qualified plumber — we can advise on installation before delivery.
The top efficiency rating, which on an instant geyser reflects both the heating design and the fact that no energy is spent keeping a tank warm around the clock.
A departure from the standard white cylinder — a dark, understated body that suits a modern bathroom or kitchen rather than drawing the eye to the wall above the sink.
Designed for tall, narrow wall spaces at 20 cm wide and 17 cm deep, so it fits the awkward strips of wall that a horizontal storage geyser rules out entirely.
Manufactured in India by a brand built specifically around water heating — with parts availability and an established service network across Delhi NCR.
| Brand / Model | AO Smith Fast On — 3 kW, Black ✅ |
| Type | Instant Water Geyser ✅ |
| Capacity | 3 Litres ✅ |
| Star Rating | 5 Star ✅ |
| Rated Pressure | 8 Bar — suitable for high-rise buildings ✅ |
| Power Consumption | 3000 W ✅ |
| Mount Type | Vertical — for tall wall spaces ✅ |
| Suitable For | Modern bathrooms · kitchens · vertical wall mountings ✅ |
| Colour | Black ✅ |
| Dimensions (W × H × D) | 20 × 30 × 17 cm ✅ |
| Weight | 3 kg ✅ |
| In the Box | Geyser · manual · warranty card ✅ |
| Country of Origin | Made in India 🇮🇳 ✅ |
| Warranty | 5 Years on Tank · 2 Years on Product · covers tank and heating element · on-site service ✅ |
Why buy from Mahajan Electronics?
- We check your building pressure and mounting first
- 45+ years of trust in home appliances
- 24-hour delivery across Delhi NCR (business hours)
- GST invoice — save up to 18% on business purchases
- 100% genuine AO Smith with manufacturer warranty
- Raja Garden · Jail Road · Dabri Mor
Order today. Delivered in 24 hours.
AO Smith Fast On · 3 Litre Instant Water Geyser · 3 kW · 8 Bar High-Rise Rated · 5 Star · Vertical Mount · Black · 5-Year Tank Warranty
Physical damage is not covered under warranty. Image for reference only.
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