How To Choose The Right Gas Hot Water System For Your Home

So, you have decided on gas hot water for your home, but you’re still wondering how to pick a system that will best suit your needs. We have taken the guesswork out of the process by breaking down the key factors you need to consider.

Choosing gas for your hot water supply at home has many benefits, one being its rapid and endless supply of hot water, making it a convenient and versatile choice. However, you must keep in mind factors such as the efficiency of your gas system, its size and your budget to ensure you are making the right choice.

We have done our research on a wide range of gas systems, catering for all budgets and requirements, providing you with an easy to follow guide on the key factors to keep in mind for your next purchase.

The Needs Of Your Home

The best place to start when considering what gas hot water system is right for your home is by taking a look at who will be using it and when it will be used. Making the appropriate decision will come down to the following factors:

  • How many people will be using hot water?
  • How often will hot water be used?
  • The number of bathrooms in your home.
  • The time of day most people will be using the hot water.
  • Other hot water supplies such as dishwashers.

The average person will use approximately 50L of hot water throughout their day, we can use this estimate to get a fair idea of how big your system needs to be to cater for each member of your household sufficiently.

Knowing the variables of your requirements will impact the size, model and delivery method of your hot water.

Energy Efficiency

Just by choosing gas for your hot water requirements, you are already selecting an energy-efficient and environmentally friendly solution.

Traditionally, heating hot water is the biggest user of energy in your home, using a gas hot water system however uses considerably less energy than the electric alternative, effectively lowering your carbon footprint and making an environmentally conscious choice.

Installing a gas hot water system that will improve the energy efficiency of your home will mean taking into consideration the size and flow of your water system, let’s have a look at two of the options available for your gas hot water delivery:

Continuous flow systems: This option will provide you with hot water directly from the gas supply line of your home. This is an ideal option if you use gas for other facilities such as heaters and stovetops.

An energy-efficient option in this category is the Rinnai Condensing Continuous Flow Water Heater. This heater will effectively capture waste heat and will use less energy in the process.

Storage systems: This system of gas hot water installation is the storage of gas in bottles on the outside or inside of your home depending on your preference, and they are ready to use whenever you need them. This option serves as a direct source for your gas, a perfect solution for those who have no gas mainline running to their home.

An energy-efficient option for a storage system of gas is the Rheem Outdoor Gas Storage. This is one of New Zealand’s most efficient domestic gas storage water heaters available, with high flow rate capabilities it is perfect for homes with more than one bathroom and who have moderate water usage.


One of the great benefits of installing a gas hot water system is the flexibility of installing the system on the outside of your home. Whether this is something you need or something you prefer, it is an excellent way to save space and keep your interior free from cylinders or appliances.

If you are looking for a compact system that can fit discreetly to the side of your home, RheemRinnai and Thermann all offer excellent solutions.


While the price for a hot water system varies depending on your requirements, there are plenty of budget-friendly options available to suit every household. Aside from the outright cost of the system itself, factors to take into consideration are:

  • The Installation of your chosen hot water system.
  • The supply of the gas, whether it be from the mainline or storage bottles.
  • Regular servicing and maintenance, to prevent costly repairs and replacements.

The servicing and maintenance costs associated with a gas system are consistent throughout all models, and overall they prove to be the most efficient and cost-effective option for your home when compared to traditional electric cylinders.

Get In Touch

For all of your gas hot water system enquiries, Hot Water Solutions can help! We offer premium brands for gas hot water delivery in your home, including Rheem and Rinnai.

We offer a full spectrum of maintenance and installation services and can provide you with the perfect solution tailored to your household needs. Get in touch with us today for a quote 0800 497 658.

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