The 3kW heating element is standard for instant geysers in India, but you should check the type and material of the heating element. Incoloy or copper heating elements are known for their durability and efficiency. Otherwise glass coated heating elements are the best. Only AO Smith provide glass coated heating element in Instant geysers in India.

Instant geyser must have safety features like a thermostat to prevent overheating and a pressure relief valve to release excess pressure. As the 3kw is considered high power which put a lot of load on wiring of the house specially old houses with decade old wiring. An ELCB inbuilt instant geyser are also need of the hour to avoid electric shock. Better to connect elcb plug/top separately to geyser.

Bajaj Splendora 3L 3KW Vertical Instant Water Heater For Home | Geyser For Bathroom & Kitchen | High Grade SS Tank | Copper Heating Element | 1-Yr Product 2-Yr Element 5-Yr Tank Warranty 【White】
  • ✅ ABS outer body with SS tank
  • ✅ Copper heating element with efficient longer life
  • ✅ Suitable for 6 bar pressure
  • ✅ Unique Weld free joint in outer metal body
  • ✅ It come with fire retardant cable and neon indicator for heating
Racold Pronto Pro 3L 3KW Vertical Instant Water Heater (Geyser) | Faster Heating | Suitable for High Rise Buildings | Italian Design|3 Levels of Safety|Convenient for Kitchen & Bathroom Applications
  • PUF INSULATION: the dense and thick insulation in the tank effectively retains heat, improving energy efficiency and lowering electricity costs
  • FASTER HEATING: the high-capacity heating element ensures rapid access to hot water
  • AUTO CUT OFF: the stem-type thermostat and cutout feature provide automatic temperature control and added safety for your water heater
  • NO BACK FLOW: the anti-syphoning system prevents water from flowing back into the container, thus avoiding dry heating
  • HIGH PRESSURE RESISTANCE: the water heater has high pressure withstanding capacity, which makes it suitable for high-rise buildings and high pressure pump applications
AO Smith EWS-5 White Instant Geyser 5 Litre With 3kW Express Heating | High Rise Building Bathroom & Kitchen geyser | UL Rated Wiring & Pressure Relief Valve For Ultimate Safety | 5 Year Tank Warranty
  • INSTANT HOT WATER HEATER FOR YOUR HOME: Experience the comfort of instant water heater technology with our 3000-watt element. Whether for your bathroom or kitchen, this instant water heater delivers hot water in seconds, perfect for cold mornings.
  • DURABLE STAINLESS STEEL GEYSER 5 LTR: Our geyser 5 litre with a stainless steel tank is built to resist corrosion even in hard water. Designed for long-lasting performance, this 5 litre geyser ensures you enjoy dependable hot water every day.
  • ADVANCED SAFETY FEATURES FOR YOUR FAMILY: Stay protected with our electric geyser featuring a 5-level safety shield. From overheating control to a rust-proof body, this instant water heater for bathroom guarantees total peace of mind for you and your loved ones.
  • HIGH-PRESSURE READY FOR HIGH-RISE HOMES: Perfect for high-rise living, our water heater 5 litre handles up to 6.5 Bar pressure effortlessly. This hot water geyser for bathroom ensures consistent performance, even in multi-story buildings.
  • WORRY-FREE WARRANTY FOR YEARS TO COME: Invest in confidence with a 5-year tank warranty and 2-year product warranty by AO Smith. Our instant water heater is backed by comprehensive coverage, ensuring you get the best experience without worry.
AO Smith EWS Plus Instant Water Heater 3 Litre with 3kW Incoloy Heating Element | 8 Bar Pressure Rating for High-rise Building | Instant Geyser for Kitchen & Bathroom | 5-Year Tank Warranty
  • SLEEK DESIGN FOR YOUR KITCHEN AND BATHROOM: Elevate your space with the AO Smith geyser 3 litre. Its sleek and modern design seamlessly blends into any kitchen or bathroom, making it the perfect kitchen geyser 3 litre for compact spaces and stylish homes.
  • CORROSION RESISTANCE FOR HARD WATER DURABILITY: Designed to last, this 3 litre geyser features a Blue Diamond glass-lined tank that resists corrosion even in hard water. Trust the durability of this electric geyser 3 litre to provide years of reliable performance.
  • RAPID HEATING FOR INSTANT COMFORT: Enjoy hot water on demand with the instant geyser 3+ litre. Its advanced glass-coated heating element ensures quick and efficient heating, making it an ideal kitchen instant water heater for busy mornings.
  • PERFECT FOR HIGH-RISE APARTMENTS: Built tough, this geyser 3 litre is perfect for high-rise living with its 8 Bar pressure rating and heavy-duty 2mm tank. Whether as a kitchen geyser or a small geyser for bathroom, it handles high-pressure needs effortlessly.
  • SAFETY YOU CAN TRUST FOR YOUR FAMILY: Stay worry-free with the AO Smith geyser 3+ litre, offering 5-level safety protection. This includes an ISI power cord, pressure relief valve, and shockproof outer body, ensuring your geyser kitchen is safe for everyone.
Havells Instanio 3L Instant Water Heater(Geyser)|Temp. Sensing LED Indicator| Rust & Shock Proof Body| ISI Marked|With Flexible Pipes|Warranty:5 year on Inner Tank| High Rise Compatible(White Mustard)
  • Type: Instant ; Capacity: 3 Litres; Wattage: 3000 Watts; Pressure: 6.5 Bars4 Level Safety : Thermostat, Automatic Thermal Cut-Out, Pressure Release Valve and Heating Indicator
  • LED : Temperature Sensing Color changing LED Indicator for real-time hotness of the water
  • Outer Body: Rust and shock proof Plastic outer body for long life
  • Heating Element : Copper heating element offers superior heating performance with its excellent resistance to both oxidation and carbonization at high temperature setting and resists corrosion against extreme and hard water conditions
  • Inner Tank : Extra thick Stainless Steel Inner tank of superior 304 Level grade​
Crompton Rapid Jet 3-L Instant Water Heater (Geyser) with Advanced 4 level Safety (White)
  • PRODUCT: Crompton’s smart instant water heater with powerful heating element
  • TECHNICAL SPECIFICATIONS: Wattage: 3000 W; Capacity: 3L; Pressure 6.5 bar
  • 4 LEVEL SAFETY: Capillary Thermostat, automatic thermal cut-out, pressure release valve and fusible plug
  • ANTI-SIPHON PROTECTION: Designed to prevent any backflow of water and protect the heating element from dry heating damage
Crompton Solarium Neo 3-Litre, 3KW Instant Water Heater/Geyser with Rust Free ABS Body (Ivory)
  • PRODUCT: Crompton’s energy efficient instant water heater with rust proof ABS body
  • TECHNICAL SPECIFICATIONS: Wattage: 3000 W; Capacity: 3L; Pressure 6.5 bar
  • 4 LEVEL SAFETY: Capillary Thermostat, automatic thermal cut-out, pressure release valve and fusible plug
  • ANTI-SIPHON PROTECTION: Designed to prevent any backflow of water and protect the heating element from dry heating damage
  • QUALITY COMPONENTS: ISI marked nickel coated special element to provide resistance against scale formation
Racold Altroi+ DN 6L 3KW Vertical 5 Star Instant Water Heater (Geyser) White, with Free Standard Installation & Pipes | Smart LED Ring|Free Electric Plug| for Kitchen & Bathroom, Wall Mounting
  • High Pressure Resistance: Your water heater has high pressure withstanding capacity, which makes it suitable for high-rise buildings and high pressure pump applications
  • Temperature Regulation Knob: An easy control knob through which you can regulate heating of water as per your requirement
  • Safety Plus: Three levels of safety against high temperature and pressure, provided by a hightech adjustable thermostat, cut-out and multi function safety valve according to international standards
  • Customized Application : It’s a unique, novel and first of its kind feature in the Instant water heater segment helps you in optimizing water heater usage . You can select ‘KITCHEN’ or ‘BATHING’ mode based on the intended hot water application
  • Smart LED Ring : The Smart LED Ring range senses when hot water is ready for bath, or other application and notifies user by changing LED color from blue to red
Polycab Intenso 3 litre, 3KW Electric Instant Geyser (Water Heater) For Home, Bathroom | Efficient Heating Element | Enhanced Safety Measures| 5 years tank & 2 years product warranty【White Blue】
  • ✅【Efficient Heating Element】Experience instant hot water with the highly efficient heating element.
  • ✅【Durable Engineered Plastic Body】Our Water Heaters boasts a rust-proof engineered plastic body that ensures prolonged durability.
  • ✅【Enhanced Safety Measures】Polycab, known for its core value of Safety with its other electrical categories, incorporates advanced safety standards and internal fire retardant cables for unparalleled protection of your famil
  • ✅【Versatile Usage】 Our compact Water Heater design is perfect for both Bathroom & Kitchen applications.
  • ✅【 Coverage】 PRODUCT WARRANTY By Polycab – 2 year. Tank Warranty by Polycab – 5 years.

Another thing to check is pressure bar capacity of inner tank specially if you like high rise buildings as water pressure can be much more for tank to withhold. You can also consider 4.5kw instant geysers if the house is fairly new with new wiring.