Water Heater | October 22 2025
5 Litre Instant vs 6 Litre Storage Water Heater
5 Litre Instant vs 6 Litre Storage Water Heater – Which One Should You Buy?
When buying a small-capacity water heater, many customers are unsure whether to choose a 5 litre instant water heater or a 6 litre storage water heater. Both have unique advantages, and the right choice depends on your hot water needs, space availability, and budget. 5l(upto 5.9l) comes under Instant Water Heater category & 6l under Storage Water Heater category as per ISI standards definition.
What is a 5 Litre Instant Water Heater?
A 5 litre instant geyser heats water instantly as it passes through a small tank made of SS, with a heating element, which makes it compact, energy-efficient for short uses, and cost-effective.Benefits of 5 Litre Instant Water Heaters
Lower price: Usually ₹2,000–₹2,500 less than 6 litre storage heaters.
Compact design: Fits easily in kitchens or small bathrooms.
Convenient: Delivers hot water quickly for short uses.
Limitations
Equipped with a Pressure Relief Valve (PRV) only, unlike storage heaters that have more safety features.
Not eligible for government star rating certification.
Does not have Puf Insulation for hot water retention.
The pressure rating is only 6.5 bars.
Venus offers few excellent 5 litre instant water heater models:
Venus Pentra 5 Litre – Stylish, compact, and reliable.
Venus Quanta 5.5Litre - Smart design, smart performance.
Venus Tefra 5 Litre (online exclusive) – A great budget-friendly option available for online shoppers.
What is a 6 Litre Storage Water Heater?
A 6 litre storage geyser stores hot water in a small insulated Glasslined enamel tank and keeps it ready for use. The PUF insulation ensures water stays hot for longer periods with minimal energy loss.
Benefits of 6 Litre Storage Water Heaters
Higher temperature: It has an adjustable thermostat so user can set the temperature to the maximum possible.PUF insulation: Retains heat for hours, reducing reheating cycles.
Energy saving: Comes with government-recognised star ratings.
Advanced safety: Features a Multi-Function Valve (MFV) that handles pressure release, vacuum release, non-return, and draining.
Pressure pump compatibility: Works safely even in modern bathrooms with high-pressure showers upto 8 bars pressure.
Convenience: Many models have a temperature control knob and digital temperature display.
Limitations:
Higher price compared to instant heaters.
Hot water is limited to the 6 litre capacity until the tank reheats.
More bulky and occupies more space .
Venus has a wide range of 6 litre storage water heater models to suit every need:
Venus Splash Pro Smart 6 Litre – Advanced smart features with stylish design.
Venus Sedra 6 Litre – Practical and efficient with modern looks.
Venus Magma Neo 6 Litre – A durable choice for everyday use.
Venus Celo 6 Litre – Value-for-money option with trusted Venus reliability.
Venus Audra 6 Litre – An exclusive online storage water heater with compact design for modern homes
Higher price compared to instant heaters.
Hot water is limited to the 6 litre capacity until the tank reheats.
More bulky and occupies more space .
Venus has a wide range of 6 litre storage water heater models to suit every need:
Venus Splash Pro Smart 6 Litre – Advanced smart features with stylish design.
Venus Sedra 6 Litre – Practical and efficient with modern looks.
Venus Magma Neo 6 Litre – A durable choice for everyday use.
Venus Celo 6 Litre – Value-for-money option with trusted Venus reliability.
Venus Audra 6 Litre – An exclusive online storage water heater with compact design for modern homes
Which One Should You Choose?
Choose a 5 litre instant water heater (Pentra / Tefra/Quanta) if you need a compact, budget-friendly unit for kitchens, bucket baths or wash basins, and you want hot water instantly without worrying about storage.
Choose a 6 litre storage water heater (Splash Pro Smart / Sedra / Magma Neo / Celo/ Audra) if you prefer hotter water, longer retention with PUF insulation, higher pressure rating, and added safety with the Multi-Function Valve.
How to decide — quick checklist before you buy
Where will it be installed? (kitchen sink, upstairs washroom, service area)
Point-of-use single taps → 5 L instant often best.
Multiple quick uses nearby → 6 L storage may be more convenient.
Water pressure: High pressure water flow with pressure pumps → Storage units perform well as they can withstand 8 bar pressure.
Instant water heaters can withstand upto 6.5 Bars pressure.
Usage pattern: Frequent short bursts back-to-back → storage helps.
Occasional single draws → instant saves energy.
Space & aesthetics: Instant = smallest footprint. Storage slightly bigger but still compact.
Budget:
If you’re looking for an affordable hot water solution, a 5 Litre Instant Water Heater is a great choice. It’s budget-friendly, costing ₹2,000–₹2,500 less than a similar-capacity storage model.
The 6 Litre Storage Water Heater offers more convenience and advanced features for a slightly higher price.
Choose a 6 litre storage water heater (Splash Pro Smart / Sedra / Magma Neo / Celo/ Audra) if you prefer hotter water, longer retention with PUF insulation, higher pressure rating, and added safety with the Multi-Function Valve.
How to decide — quick checklist before you buy
Where will it be installed? (kitchen sink, upstairs washroom, service area)
Point-of-use single taps → 5 L instant often best.
Multiple quick uses nearby → 6 L storage may be more convenient.
Water pressure: High pressure water flow with pressure pumps → Storage units perform well as they can withstand 8 bar pressure.
Instant water heaters can withstand upto 6.5 Bars pressure.
Usage pattern: Frequent short bursts back-to-back → storage helps.
Occasional single draws → instant saves energy.
Space & aesthetics: Instant = smallest footprint. Storage slightly bigger but still compact.
Budget:
If you’re looking for an affordable hot water solution, a 5 Litre Instant Water Heater is a great choice. It’s budget-friendly, costing ₹2,000–₹2,500 less than a similar-capacity storage model.
The 6 Litre Storage Water Heater offers more convenience and advanced features for a slightly higher price.
FAQs
Q1: What is the difference between a 5 litre instant water heater and a 6 litre storage water heater?
A 5 litre instant geyser heats water instantly as it flows through a small tank with a heating element, while a 6 litre geyser stores hot water in a tank with PUF insulation. 5l comes under Instant Water Heater category & 6l under Storage Water Heater category as per ISI standards definition. Storage models reach higher temperatures and are star-rated for energy savings, while instant heaters are compact and more affordable.
Q2: Which is better for kitchens – 5 litre instant or 6 litre storage water heater?
For kitchens, bucket baths and wash basins, a 5 litre instant water heater like the Venus Pentra, Quanta or Tefra is ideal. They provide on-demand hot water, save space, and are budget-friendly.
Q3: Do 6 litre storage water heaters save electricity?
Yes. Thanks to PUF insulation and government-certified star ratings, 6 litre storage models like Splash Pro Smart, Sedra, Magma Neo, Celo and Audra, retain heat for hours, reducing reheating cycles and saving energy.
Q4: Can I use a 6 litre storage water heater with a pressure pump?
Yes. Venus 6 litre storage models are pressure pump compatible and come with a Multi-Function Valve (MFV) for safety, making them ideal for modern bathrooms with high-pressure showers.
Q5: Why is an instant water heater cheaper than a storage water heater?
Instant water heaters cost around ₹2,000–₹2,500 less because they don’t have PUF insulation,MFV,or advanced controls and material of the inner tank is different . They are great for quick, short-duration use.
The 5 Ltr instant geyser and 6 ltr storage geyser serve different purposes, and with Venus’s range, you can select the model that best matches your usage and comfort. Both options from Venus combine durability, safety, and energy efficiency so you can enjoy hot water exactly the way you want it.
Ready to bring home the perfect 5-litre water heater or 6 litre storage water heater?
Explore our range of models https://www.venushomeappliances.com or call our customer care team at 08144666999 for guidance in choosing the right one for your home at the best prices.
Q1: What is the difference between a 5 litre instant water heater and a 6 litre storage water heater?
A 5 litre instant geyser heats water instantly as it flows through a small tank with a heating element, while a 6 litre geyser stores hot water in a tank with PUF insulation. 5l comes under Instant Water Heater category & 6l under Storage Water Heater category as per ISI standards definition. Storage models reach higher temperatures and are star-rated for energy savings, while instant heaters are compact and more affordable.
Q2: Which is better for kitchens – 5 litre instant or 6 litre storage water heater?
For kitchens, bucket baths and wash basins, a 5 litre instant water heater like the Venus Pentra, Quanta or Tefra is ideal. They provide on-demand hot water, save space, and are budget-friendly.
Q3: Do 6 litre storage water heaters save electricity?
Yes. Thanks to PUF insulation and government-certified star ratings, 6 litre storage models like Splash Pro Smart, Sedra, Magma Neo, Celo and Audra, retain heat for hours, reducing reheating cycles and saving energy.
Q4: Can I use a 6 litre storage water heater with a pressure pump?
Yes. Venus 6 litre storage models are pressure pump compatible and come with a Multi-Function Valve (MFV) for safety, making them ideal for modern bathrooms with high-pressure showers.
Q5: Why is an instant water heater cheaper than a storage water heater?
Instant water heaters cost around ₹2,000–₹2,500 less because they don’t have PUF insulation,MFV,or advanced controls and material of the inner tank is different . They are great for quick, short-duration use.
The 5 Ltr instant geyser and 6 ltr storage geyser serve different purposes, and with Venus’s range, you can select the model that best matches your usage and comfort. Both options from Venus combine durability, safety, and energy efficiency so you can enjoy hot water exactly the way you want it.
Ready to bring home the perfect 5-litre water heater or 6 litre storage water heater?
Explore our range of models https://www.venushomeappliances.com or call our customer care team at 08144666999 for guidance in choosing the right one for your home at the best prices.
