Instant Vs. Storage Water Heater

Instant Water Heaters or Storage Heaters: What’s Better?

Table of Contents

When it comes to choosing a water heating system for your home, there are generally two types to consider: instant and storage water heaters. Both options have their pros and cons, and making an informed decision is crucial to ensure optimal comfort and efficiency. In this article, we will explore the advantages and disadvantages of each system to help you determine which one is the best water heater for your needs.

Storage Water Heaters

A storage water heater, as the name suggests, stores and heats a large amount of water in an insulated tank. Here are some key points to consider when it comes to storage water heaters:

Advantages of Storage Water Heaters

A. Ample Hot Water Supply

One of the most significant advantages of a storage water heater is its ability to provide a large amount of hot water. This is particularly beneficial for households with multiple bathrooms or high hot water demands.

B. Constant Temperature

With a storage water heater, you can enjoy a constant supply of hot water at a predetermined temperature. This can be ideal for individuals who prefer a consistent shower experience.

C. Lower Initial Cost

Storage water heaters are generally less expensive to purchase and install compared to instant water heaters.

Disadvantages of Storage Water Heaters

A. Limited Capacity

The storage tank’s capacity determines the amount of hot water available. Once the tank empties, it takes time to refill and reheat the water, resulting in a temporary shortage of hot water until it is ready again.

B. Energy Consumption

Storage water heaters continuously maintain the set temperature, which can lead to heat loss and increased energy usage. This may result in higher utility bills, especially if the water is kept hot for long durations without usage.

C. Space Requirement

Storage water heaters can be bulky and require a dedicated space for installation. This might pose a problem for individuals with limited storage or living space.

Instant Water Heaters

Also known as a tankless or on-demand water heater, heats water directly as it flows through the unit. Let’s explore the advantages and disadvantages of this system:

Advantages of Instant Water Heaters

A. Unlimited Hot Water

Unlike storage water heaters, these heaters provide hot water on demand and never run out. This is possible because the water is heated instantaneously as it is needed, eliminating the need for a storage tank.

B. Energy Efficiency

These heaters only heat water when there is a demand, making them highly energy-efficient. They eliminate standby heat loss associated with storage water heaters, resulting in potential energy cost savings.

C. Space-Saving

These water heaters are compact and wall-mounted, requiring significantly less space compared to storage water heaters. This makes them an excellent choice for small apartments or homes with limited room for bulky appliances.

Disadvantages of Instant Water Heaters

A. Limited Flow Rate

While instant water heaters can provide a continuous supply of hot water, their flow rate is limited. This means that in large households with simultaneous hot water usage, such as running multiple showers, the flow rate may be compromised, resulting in reduced water pressure.

B. Higher Initial Cost

Instant water heaters are generally more expensive to purchase and install due to their advanced technology and designs. However, the cost can be offset by their energy efficiency in the long run.

C. Temperature Fluctuations

Some users might experience slight temperature fluctuations when using instant water heaters, especially when starting or ending a shower. However, modern models have advanced controls that minimize this issue.

The Clear Choice: Instant Over Storage Water Heaters

When it comes to choosing a water heating system for your home, the options can be overwhelming. However, one option that stands out and provides numerous advantages is the instant water heater. In contrast to traditional storage water heaters, instant water heaters offer unmatched energy efficiency, convenience, and space-saving features.

1. Energy Efficiency

Instant or tankless water heaters, offer significant energy savings compared to storage water heaters. Unlike storage heaters that continuously heat and maintain a large tank of water, instant water heaters heat water on demand. By eliminating the need to keep a reservoir of hot water, you can save substantial amounts of energy and reduce your utility bills. On average, instant water heaters consume about 30% less energy than their storage counterparts, making them an eco-friendly and cost-effective choice.

2. Unlimited Hot Water

One of the biggest advantages is their ability to provide a continuous supply of hot water. With a storage water heater, hot water is limited to the capacity of the tank, leading to the infamous “cold shower syndrome” when the hot water runs out. In contrast, instant water heaters offer an endless stream of hot water, ensuring that you never have to worry about running out, even during peak usage times. This feature is particularly beneficial for larger households or homes with multiple bathrooms.

3. Space-Saving Design

Another compelling reason to opt for instant water heaters is their compact and space-saving design. Compared to bulky storage water heaters that require a significant amount of floor space, instant heaters are sleek and can be installed almost anywhere. Their compact size makes them an ideal choice for apartments, smaller homes, and even outdoor installations. Additionally, the absence of a large tank allows for more flexibility when it comes to installation, making them an excellent space-saving solution.

4. Longevity and Reduced Maintenance

Traditional storage water heaters tend to have a limited lifespan, typically around 10-15 years. In contrast, instant water heaters are designed to last up to 20 years or more. The absence of a water storage tank eliminates the risk of corrosion and leakage, which are common issues with storage water heaters. Moreover, instant water heaters require minimal maintenance, saving you time and money on repairs and replacements.

5. Reduced Water Consumption

Instant water heaters indirectly promote conservation by minimizing wastage. Storage water heaters require a certain amount of time to heat the water in the tank, which can result in excess water being wasted while waiting for it to reach the desired temperature. With instant water heaters, the water is heated instantly, eliminating the need for wasteful waiting periods and leading to a more eco-friendly water consumption.


The choice between an instant and a storage water heater largely depends on your specific needs and circumstances. If you require a large and continuous supply of hot water and have adequate space, a storage water heater might be the better option. On the other hand, if you value energy efficiency, space-saving, and a never-ending supply of hot water, an instant water heater would be the more suitable choice. Consider your household’s size, hot water demand, budget, and preferences to make an informed decision.

Looking to get your hands on a brand new heater? Purchase it at Yeobuild HomeStore today or If you have water heater issues book a repair now with Yeobuild HomeRepair!


Shopping Cart
icon-angle icon-bars icon-times
Compare Table PDF Link Form

Copy to ClipBoard Send to Email Close
Enter your email: