Hot Water Systems & Units

Choose from our full range of hot water systems designed for Australian homes and small businesses. This category brings together trusted hot water units, matched accessories, and practical advice so you can choose with confidence. 

Explore: Gas Hot Water Units
Explore: Electric Hot Water Units
Explore: Hot Water Unit Accessories

Why buy your hot water unit from Renovation Kingdom

You want reliable hot water, low running costs, and a system that fits your space. Renovation Kingdom stocks over 20,000 bathroom and plumbing products from leading Australian brands, so you can match the right model to your property and budget. Our team helps you pick the correct size, the right energy source, and the add-ons that make day-to-day use easier.

What you can expect:

• Broad range of storage and continuous flow systems
• Compact options for apartments and tight plant cupboards
• Outdoor and indoor models with compatible valves and fittings
• Fast shipping and support from an experienced e-commerce team

Gas vs electric hot water systems

Both gas and electric hot water systems can deliver strong performance. The best choice comes down to running costs in your area, available connections, and household demand.

Gas hot water systems

• Heat water quickly and recover faster after long showers
• Continuous flow models only heat on demand, saving space
• Suits households with natural gas or LPG supply
• Works well in cooler climates thanks to rapid heat output

Electric hot water systems

• Wide choice of storage tanks in common Australian sizes
• Simple installation and straightforward maintenance
• Off-peak tariffs can lower running costs
• Suits properties without gas connections

Not sure which way to go? Compare models in both subcategories, then weigh up tariff options, installation location, and the total price including valves and pipework.

Sizing your hot water unit

Getting the right size matters. Too small and you run out of hot water. Too large and you pay to heat water you do not use. As a quick guide:

• Singles or couples in a flat: 50 to 125 litres storage or a compact continuous flow
• Families of 3 to 4: 160 to 250 litres storage or a mid-capacity continuous flow
• Larger families or properties with two bathrooms: 250 to 315 litres storage or a high-capacity continuous flow

Also consider:

• Peak demand times such as morning showers
• Appliances that use hot water at the same time, like washing machines
• Flow rate in litres per minute for continuous flow models
• Recovery rate for storage tanks if you have long baths or back-to-back showers

Energy use and running costs

Running costs are shaped by energy prices, tariff type, and how efficiently the unit turns energy into hot water. To lower ongoing costs:

• Choose the right capacity so the system does not cycle more than it needs to
• For electric storage, consider off-peak tariffs or day/night meters
• For gas, look at continuous flow units with smart modulation for stable temperatures
• Add pipe lagging on exposed hot lines to reduce heat loss
• Keep temperature relief and tempering valves in good condition

Installation, location, and compliance

Hot water systems must be installed by a licensed plumber and, in some cases, a licensed electrician. Location affects performance and service life.

• Outdoor units free up indoor space and vent naturally
• Indoor units need correct flueing, drainage, and clearances
• Access for maintenance saves time and avoids future re-work
• Drainage for TPR valves and condensate lines prevents pooling
• Talk to your installer about slab mounting, seismic restraint, and safe tray requirements for indoor tanks.

Accessories that make a difference

Complete your setup with the right accessories. You will save time at install and get stable temperatures day to day.

• Tempering valves for compliant delivery temperatures
• Pressure limiting and expansion control valves
• Non-return and duo valves for clean connections
• Pipe insulation to cut heat loss
• Mounting brackets, recess boxes, and fixing kits
• Anode replacements for longer tank life

Head to Hot Water Unit Accessories to bundle the parts your plumber will ask for.

Maintenance tips for longer service life

Basic maintenance helps you avoid outages and unplanned costs.

• Test the temperature and pressure relief valve as per the manufacturer’s guide
• Keep the area around outdoor units clear of debris
• Check for small leaks at fittings during seasonal changes
• For storage tanks, talk to your plumber about anode checks at recommended intervals
• Book regular servicing if you have hard water or heavy use

How to choose in three steps

1. Pick your energy source
    Do you have gas on site or are you on electricity only? If electricity, can you access off-peak rates?
2. Match capacity to demand
    Count bathrooms, typical shower length, and peak time overlap. Use flow rate for continuous systems or tank size for storage.
3. Add the right accessories
    Select valves, insulation, and any location kits so your installer has everything on the day.

When you are ready, browse:

• Gas Hot Water Units
• Electric Hot Water Units
• Hot Water Unit Accessories

Trusted Australian brands

Renovation Kingdom partners with renowned Australian brands known for reliable parts supply and strong warranty support. That means clear documentation, accessible service networks, and replacement components that are easy to source.

Renovation Kingdom is Australia’s leading supplier of high-quality bathroom products, with a huge range of hot water systems ready to ship. Compare gas and electric hot water units, add the accessories your installer needs, and place your order with confidence.