If you aren’t someone who makes frequent purchases, selecting the energy-efficient water heaters won’t be an easy chore for you. However, you shouldn’t be concerned because we have provided you with the most comprehensive list possible of the top energy-efficient water heaters. Have a look at the products on our list, and pick the ones that appeal to you the most.
We researched and tested 294 energy-efficient water heaters in the market to get you the list of the energy-efficient water heaters. Our most recommended product is AO Smith Energy-efficient Water Heaters. Check out our best 146 for all of our favorites, and be sure to read our buying guide to get all the information you need to make the best choice!
Top 9 energy-efficient water heaters
1. AO Smith HSE-VAS-X-015 Storage 15 Litre Vertical Water Heater

- Type: Storage ; Capacity: 15 Litres; Wattage: 2000 Watts; Pressure: 8 Bars ; BEE Rating: 4 Star;
- Inner Tank Material: Blue Diamond Glass Lined Tank- 2X Corrosion Resistance; Outer Body Material: Metal
- Product Dimensions: 44.1 cms X 33.8 cms X 33.8 cms
- Warranty: 7 years on inner tank, 2+1* years extended warranty on glass coated heating element and 2 years comprehensive
- Included in the box: 1 Vertical Storage Water Heater, User Manual , Mounting Screws
- Blue Diamond Glass-Lined Tank for 2X corrosion resistance
- Glass-Coated Heating Element to prevent scale formation and extend the life of heating element
- BEE 4-star rated with Advanced PUF Technology for Power Savings. Perfect if you want to go green
- Double Protection with Thermal Cut-Out and Multi-function Safety Valve
2. Crompton Amica 25-L 5 Star Rated Storage Water Heater

- PRODUCT: Crompton's energy efficient storage water heater with fast heating
- TECHNICAL SPECIFICATIONS: Wattage: 2000 W; Capacity: 25L; Star Rating 5; Pressure 8 bar; Temperature range: 25-75 degree C
- 3 LEVEL SAFETY: Capillary Thermostat, automatic thermal cut-out & multi-functional valve to provide higher safety
- ANTI-RUST: Fitted with specially designed magnesium anode which prevents corrosion due to hard water quality
- QUALITY COMPONENTS: ISI marked nickel coated special element to provide resistance against scale formation
3. Crompton Arno Neo 5 Star Rated Storage Water Heater

- PRODUCT: Crompton's energy efficient storage water heater with fast heating
- TECHNICAL SPECIFICATIONS: Wattage: 2000 W; Capacity: 15L; Star Rating 5; Pressure 8 bar
- 3 LEVEL SAFETY: Capillary Thermostat, automatic thermal cut-out & multi-functional valve to provide higher safety, Heating Element - Copper
- ANTI-RUST: Fitted with specially designed magnesium anode which prevents corrosion due to hard water quality
- QUALITY COMPONENTS: ISI marked nickel coated special element to provide resistance against scale formation
4. AO Smith SDS-GREEN SERIES-015 Storage 15 Litre Vertical Water Heater

- Type: Storage ; Capacity: 15 Litres; Wattage: 2000 Watts; Pressure: 8 Bars ; BEE Rating: 5 Star;
- Blue Diamond Glass-Lined Tank for 2X corrosion resistance
- Long-lasting Anode Rod a customised alloy that works even in hard water conditions to protect the tank and has 2X lifespan as compared to normal magnesium rod.
- Product Dimensions: 37.3 Cms X 37.3 Cms X 34.8 Cms
- Installation: Water Heater Free Installation is applicable up to municipal city limit of Bangalore, Chennai, Hyderabad, Secunderabad, Pune - PCMC, Delhi, Noida, Faridabad, Ghaziabad, Gurgaon, Kolkata, Howrah and Hooghly. Free Installation does not include any additional material e.g. connecting hoses, water inlet & outlet, pipe nipples, any additional material, electrical fittings & Demounting* of old geyser etc. In rest of the cities, installation will be provided by the brand against the installation charge of INR 400
- Inner Tank Material: Blue Diamond Glass Lined Tank- 2X Corrosion Resistance; Outer Body Material: ABS
- Glass-Coated Heating Element to prevent scale formation and extend the life of heating element
- Included in the box: 1 Vertical Storage Water Heater, User Manual , Mounting Screws
- Warranty: 7 years on inner tank, 2+2* years extended warranty on glass coated heating element and 2 years comprehensive
5. Havells Instanio

- 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
- Warranty: 5 years on inner container, 2 years on Heating Element, 2 years comprehensive warranty
- Product Dimensions: 22.5 cms x 37.3 cms x 19.0 cms
- Fire retardant ISI mark supply cord without plug top
- ISI Mark and ISI Certification on overall product electrical equipment
- Power: 3000 watts; Operating Voltage: 220 - 240 volts