For family size of 1-2 people 6-10 liter water geyser is enough if you take bath via bucket.
If you guys take hot water bath via shower then 15L is enough.
A lot also depends on how long is underground pipe from geyser to tap? How harsh winter is in area you live? Buy one bigger size of water heater if you live in hilly areas of India.
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
Crompton InstaBliss 3-L Instant Water Heater (Geyser) with Advanced 4 Level Safety (White), Wall Mounting
- Rust Proof Outer Body: High quality Thermoplastic engineering prevents rusting of the outer body
- Food Grade Inner Tank: 304 Grade Stainless Steel Inner Tank; also suitable to be used in the kitchen
- Powerful Heating: 3000-Watts Copper Heating Element for 33% faster heating
- 4-Level Safety: Thermostat, automatic thermal cut-out, pressure release valve and a fusible plug to ensure complete safety
- Withstands a pressure of 6.5 Bar: Suitable for high rise buildings and pressure pump applications
Havells Standard Lyft 3 Litre Instant Water Geyser 3000 Watts | Stainless Steel Tank | Rust Proof Body | Automatic Cut Off | 5 Year Inner Tank Warranty, 2 Year Comprehensive Warranty (White)
- Superior 304 Grade Stainless steel tank
- Preset Thermal cutout
- Anti Corrosion tank
- Rust proof ABS body
- Preset Thermal cutout
Orient Electric Aura Rapid Pro | 5.9 Litre Instant Water Heater | Stainless Steel Tank | Shockproof | 6.5 bar pressure compatibility | Suitable for low & mid rise buildings| 5 years warranty by Orient
- INDIA’S FIRST 5.9L INSTANT WATER HEATER: India’s first 5.9L instant geyser, Aura Rapid Pro, is Orient Electric’s revolutionary launch.
- LONG LIFESPAN WITH STAINLESS STEEL TANK: Made with high-grade Stainless-Steel tank, this water heater comes with an extended lifespan, fulfilling your hot water needs endlessly.
- ENJOY FASTER HEATING AND OPTIMAL HOT WATER: The electric water heater comes with a heavy Copper heating element that heats water faster, fulfilling your hot water needs anytime.
- SHOCK-PROOF AND RUST-RESISTANT BODY: The high-strength polymer body of this water heater is shock-proof and rust-resistant for ultimate safety and extended lifespan.
- SUITABLE FOR LOW-RISE AND MID-RISE BUILDINGS: With a pressure compatibility of up to 6.5 bars, the instant geyser is suitable for low-rise and mid-rise buildings.
V-Guard Zio Instant Geyser 5 Ltr Wall Mount Water Heater|Advanced Multi-Layered Safety|3000 W Powerful Heating|Strong Stainless Steel Tank|Suitable For Kitchen&Bathroom|White-Blue
- POWERFUL INSTANT HEATING: V-Guard Zio 5 Litre is powered by a superior 3 kW heating element with a copper sheath and high-grade magnesium oxide insulation for quick movement of heat
- ADVANCED 4 LAYER SAFETY: Pressure release valve for safer operations at higher pressures, ISI marked thermostat for cutting off power supply when temperature exceeds 55°C, Overheating protection through disc type snap action safety device operating at 90°C & Anti-siphon Protection for preventing the reverse flow of water
- STYLISH & ENERGY EFFICIENT : This Instant Water Heater maintains maximum heat retention with eco-friendly insulation and has an stylish colour display panel indicating the status of heat and power
- HIGH DURABILITY: Robust Inner Tank of Zio is made of high-grade 304 Stainless Steel | Rust-proof high-quality engineering polymer constitutes the Outer Body, preventing rust formation
- WARRANTY: V-Guard Zio has a warranty of 2 Year on Product, 2 Year on Heating Element and 5 Year on Inner Tank
AO Smith Geyser 15 Litre 5 Star Rating (BEE) | Powerful 2KW Heating | Storage Water Heater With 2X Corrosion Resistant Blue Diamond Glass Tank | Warranty: 5 Yr Tank, 2 Yr Comprehensive | HSE-SHS-015
- DOUBLE PROTECTION FOR SAFETY: Enjoy ultimate peace of mind with this AO Smith 15-litre water geyser. It features a factory-set thermostat, multi-function safety valve, and thermal cut-out, ensuring safe and reliable hot water for your bathroom every day.
- DURABLE & ELEGANT DESIGN: This AO Smith 15-liter water geyser is crafted with a glossy ABS plastic body and blue diamond glass-lined tank for 2X corrosion resistance, making it the best 15L storage water heater for style and durability.
- ENERGY-EFFICIENT 5-STAR GEYSER: Save on electricity bills with this BEE 5-star rated 15-litre geyser. Perfect for eco-conscious homes, this water heater ensures efficient heating while reducing energy consumption, making it a top choice in India.
- BUILT FOR HIGH-PRESSURE USE: This AO Smith 15-liter storage water geyser can handle up to 8 bars of pressure, making it ideal for high-rise apartments or hard water areas. Enjoy uninterrupted hot showers without compromising performance.
- LONG-LASTING WARRANTY COVERAGE: With a 5-year warranty by AO Smith on the inner tank, 2 years on the glass-coated heating element, and 2 years comprehensive by AO Smith, this AO Smith 15-litre water heater offers unparalleled after-sales support for peace of mind.
V-Guard Zio Instant Water Geyser | 3 Litre | 3000 W Heating | White-Blue | | 2 Year Warranty
- POWERFUL INSTANT HEATING: The geyser is powered by a superior 3 kW heating element with a copper sheath and high-grade magnesium oxide insulation for quick movement of heat
- ADVANCED 4 LAYER SAFETY: Pressure release valve for safer operations at higher pressures, ISI marked thermostat for cutting off power supply when temperature exceeds 55°C, Overheating protection through disc type snap action safety device operating at 90°C & Anti-siphon Protection for preventing the reverse flow of water
- HIGH DURABILITY: Robust Inner Tank of Zio is made of high-grade 304 Stainless Steel | Rust-proof high-quality engineering polymer constitutes the Outer Body, preventing rust formation
- WARRANTY: V-Guard Zio has a warranty of 2 Year on Product, 2 Year on Heating Element and 5 Year on Inner Tank
- PAN INDIA INSTALLATION AVAILABLE: Installation can be availed at INR 299 (Incl. GST) while the Inlet and Outlet Connection Pipes can be purchased from the technician on a chargeable basis (INR.350)
If your bathroom is on top floor of the house or an open bathroom? Here I recommend gas geyser as these need to be installed in open only. However buy only from renowned brand which can provide you service every year. Gas geyser need special care and maintenance. A yearly service from authorized service guy once a year at start of winter is enough for gas geysers.