Understanding Storage Hot Water Systems: A Comprehensive Guide

Ah, hot water – it’s a comfort many of us take for granted, until the day it runs cold. That’s why choosing the right hot water system for your home is vital.

Among the plethora of options available, storage hot water systems have stood the test of time, offering reliable hot water supply to countless Australian homes. But how do these systems work, and what makes them tick?

Let’s dive into the world of hot water systems, focusing on the storage variety, to answer these questions and more.

The Backbone: The Storage Tank

Think of a storage hot water system as a large thermos. Inside this system is a tank, the hub of the whole operation, where water is heated to a set temperature and kept insulated until you’re ready to use it.

Your typical storage tank is a robust vat, which can be stationed either inside or outside of your property, depending on the space you have available. It’s in here that the magic happens – water is heated and stored.

The tanks come in a range of sizes depending on your household needs. Opting for the right hot water system ensures you’re never suddenly caught out with a cold surprise in the middle of a hot shower.

The Basics of Storage Hot Water Systems

At its core, a storage hot water system operates by heating water and storing it for future use. This fundamental process involves a tank where the heated water is kept until needed, whether for a shower, washing dishes, or other household tasks.

The system then replenishes the hot water as it gets used, ensuring a consistent supply. But what powers these systems? Let’s explore.

• Gas hot water systems: Gas hot water systems, including gas storage, use natural gas or liquefied petroleum gas (LPG) to heat the water in the storage tank. These are popular for their energy efficiency and capacity to supply a substantial amount of hot water at a relatively low running cost. A gas burner situated under the tank heats the water, making gas storage systems highly effective for larger households.
• Electric hot water systems: Electric storage hot water systems, on the other hand, use electricity to heat elements inside the tank, which then warm the water. Electric systems can be quite versatile, often available in multiple sizes to suit different home sizes and hot water demands. However, they can also operate on off-peak electricity to help minimise energy bills, despite electricity generally being more expensive than gas.
• Solar hot water systems: Solar hot water systems use solar panels typically installed on the roof, which capture sunlight and convert it into energy to heat the water. These systems also include a storage tank, enabling them to store heated water for use when the sun isn’t shining. Solar systems are environmentally friendly and energy efficient, making them an excellent choice for eco-conscious households.
• Heat pumps: Another variant in the storage hot water landscape is the heat pump. These innovative systems extract heat from the air, ground, or water to heat water, making them a highly energy-efficient option. Like other storage systems, heat pumps come with a tank to store the hot water for later use.

How Long Does a Storage Tank System Last?

One of the common questions people have is: “How long do storage hot water systems last?” Generally, these systems can last between 10 to 15 years, sometimes longer with proper maintenance.

Durability often depends on the system’s material, the quality of water, and how well the system is maintained over the years.

Drawbacks of Storage Water Heaters

The major drawback is that they can lose heat over time, a process called standby heat loss. Insulation can minimise this, but it’s an inherent disadvantage of having a tank.

Here’s a summary of drawbacks to using a tank storage hot water system:

1. Limited capacity: Storage hot water systems have a finite amount of hot water available at any given time. Once the tank is emptied, you have to wait for it to refill and reheat, which can be inconvenient during periods of high demand.
2. Energy consumption: These systems continuously heat water to maintain a set temperature, even when not in use. This can result in energy wastage and higher utility bills compared to more energy-efficient alternatives.
3. Space requirements: The size of the storage tank can be bulky and take up significant space, particularly in smaller homes or apartments where space is at a premium.
4. Heat loss: Heat can escape from the tank over time, especially in older or poorly insulated units. This means the system may need to work harder to maintain water temperature, further increasing energy usage.
5. Maintenance needs: Storage hot water heaters require regular maintenance to ensure optimal performance and longevity, including flushing the tank to remove sediment buildup and checking for leaks or corrosion.

Choosing the Right Tank Material

When it comes to storage tanks, stainless steel is often hailed as the best material due to its durability and resistance to corrosion.

Let’s take a more detailed look at stainless steel tanks and the other options on the market:

• Stainless steel: Stainless steel tanks are durable and commonly used in storage hot water systems. They can withstand high temperatures and are less prone to corrosion compared to some other materials. However, they can still rust over time, especially if not properly maintained.
• Glass-lined tanks: Glass-lined tanks have a coating that helps prevent corrosion and extend the lifespan of the tank. They are often considered a good option for areas with hard water, as the coating reduces mineral buildup.
• Copper tanks: Copper tanks are known for their excellent heat conductivity, which allows for faster heating of water. However, they can be more expensive than other materials and may be prone to corrosion in certain water conditions.
• Plastic tanks: Plastic tanks are lightweight and resistant to corrosion, making them a suitable choice for areas with aggressive water conditions. However, they may not be as durable as steel or glass-lined tanks and can be susceptible to damage from high temperatures.

Why Professional Installation Matters

Hot water system installation is not a DIY-friendly task. Ensuring that your hot water system, be it natural gas or LPG, electric or solar, is correctly installed and configured to your home’s needs is crucial for its efficiency and longevity.

Professional installers can also advise on the best system size for your household, preventing under or oversizing issues.

Moreover, incorrect installation can lead to increased energy costs and even pose safety risks, particularly with gas systems. Always hire a licensed professional for installation to ensure everything runs smoothly and safely.

The Verdict on Storage Hot Water

Choosing the right hot water system – be it gas, electric, solar or a heat pump system – depends on your household’s needs, budget, and available energy sources. Each type comes with its benefits and potential drawbacks.

Gas systems are generally more energy efficient and have lower running costs, while solar systems are the most environmentally friendly. Electric storage systems offer convenience and simplicity, and heat pumps, while initially more expensive, can provide significant savings on energy bills over time.

Storage hot water systems, with their ability to supply hot water on demand and sustain it for multiple uses, remain a popular choice for many Australian households. Remember, when considering a new hot water system, always factor in the size, energy source and the importance of professional installation to ensure you get the most efficient, high performing system for your home.

Please note: This information is provided for advice purposes only. Regulations differ from state to state, so please consult your local authorities or an industry professional before proceeding with any work. See our Terms & Conditions here.