There are a few factors to take into consideration when choosing a type of water heating system to install. Whether it’s for a residential home or commercial premises, there are various options to suit your specific requirements and property type.

Let’s assess the differences between two popular hot water system options:


An instantaneous unit heats cold water immediately while the unit is in use. A gas continuous flow system uses little consumption. The lower carbon footprint also means there is less pressure on the environment, which is highly beneficial.

One of the downsides of this system is the water efficiency. There is a minimum flow requirement before the water starts heating up. This results in a few litres of clean, wasted cold water down the drain. A great way to combat this problem is by collecting this water in a tank system allowing you to reuse it for your garden.

This water heating system is also a space saver. Since it is a tankless system, there are many storage options available. These units can be installed inside and outside depending on the space you have available.

The flow rate of a continuous hot water system is dependent on the operation, as there are minimum and maximum flow rates to consider. The water heat is relative to how long you use your heating system.

Purchasing and installing a continuous flow system won’t cost you an arm and a leg. The cost of installing different hot water heating systems is quite similar, no matter the type of unit you choose.


Both types of water heating systems are reliable and safe, and top leading brands always offer a good warranty. Continuous and storage water units both provide temperature-controlled water to avoid scalding.

Storage water units however, have a more consistent water temperature and flow due to the stability of the system rather than the ‘automation’ of the instantaneous flow system, as there are no minimum or maximum flow fluctuations.

You will need to consider how many people live in your home. The larger your family, the larger your tank should be. Once the hot water is depleted, it may take a while – sometimes up to 45 minutes – to replenish. The bigger the tank, the less frustration there will be.

Hot water storage tanks are much larger in size and therefore more challenging to install and make space for. Often, these types of units are installed outside your home. The tank has built-in heating capabilities, making it easy to heat and to maintain. Just be sure to call in professionals for regular maintenance services to ensure the longevity of your system.

No matter what type of hot water heater you choose, chat to the professionals at Boeing Plumbing about the perfect one for you, or find out more.