AO Smith Fast-On is a compact, point-of-use instant water heater built for quick hot water at a single tap — ideal for a wash basin or kitchen sink where a full storage geyser isn't needed. Features a Blue Diamond glass-lined tank for corrosion resistance and is rated for high-rise plumbing pressure.
Key Specifications
Brand: AO Smith
Series: Fast-On
Power: 3000 W
Tank: Blue Diamond glass-lined
Pressure rating: 8 bar (suitable for high-rise buildings)
Tank warranty: 5 years
Available Volume Capacities
3 Litres — fastest heat-up, best for a single wash basin or hand-wash point with light, quick-draw usage
5 Litres — slightly more standing hot water, a better fit for a kitchen sink or a basin used more frequently through the day
How to Use
Mount close to the point of use — Fast-On is designed for single-tap, point-of-use installation, not whole-home supply.
Ensure the inlet water pressure and your building's plumbing are compatible with the 8 bar rating, especially in high-rise installations.
Have a licensed electrician/plumber handle electrical earthing and pressure-relief valve installation.
Allow the unit to heat fully before first use; service the tank periodically per the manufacturer's schedule.
Frequently Asked Questions
Is this a replacement for a full-size storage geyser? No — Fast-On is a point-of-use unit for one tap. For bathroom/shower use with sustained hot water, a larger-capacity storage geyser is a better fit.
Is it suitable for high-rise apartments? Yes, it's rated for 8 bar pressure, which covers typical high-rise plumbing pressure.
Why Buy From Buildenza
Genuine AO Smith product, delivered by Buildenza in 60 minutes across our Kondapur/IT Corridor delivery zone.
Delivery and returns
Delivered in 60 min in Kondapur and the IT Corridor. Free delivery above ₹5,000. Damaged or wrong items are replaced if reported within 4 hours of delivery; cut lengths cannot be returned.
