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Compare What is the Best Hot Water Heater System: Reviews & Prices

The best hot water heater system has the right combination of good reviews, ratings, size, price, the type of system, the brand and the specific model that fits your needs. The best hot water heater system is going to be different for different people, depending on their situation.

Want to find what is the best hot water heater system? Concerned that what your plumber recommends may not be what is the best hot water system for you or your home? 

What size hot water service do I need?

What is the best hot water heater system price?

We review and compare the best hot water heater system types and prices, comparing the pros and cons of the various alternatives, to help you make an informed decision.

Compare Best Gas Instantaneous Hot Water System Brands - Best Electric Hot Water System

Best hot water system

Some say it's the best gas instantaneous hot water system and others say it's the best electric hot water systems. The best gas instantaneous hot water system, best gas hot water heater brands, best natural gas water heater or just the best hot water heater system has the right combination of good reviews, ratings, size, price, the type of system, the brand and the specific model you need.

Comparing the best electric hot water system vs the best gas Instantaneous hot water system is obviously a subjective judgement, but that will be true of anyone trying to compare and name the best of anything.

Given that hot water often consumes around 25% of a home’s energy budget, you really want the best hot water system for you or your home.

These decisions will affect the upfront cost of purchase and installation and the ongoing running costs.

Compare the Best Gas Hot Water Heater Brands

Many people that compare believe that gas instantaneous hot water heater system brands are the best hot water heater system choices. The best gas instantaneous hot water systems are now available in 7 Star units. The best instantaneous continuous gas hot water heater system brands include Rinnai and Rheem.

The top selling Rinnai Infinity 26 is the best gas instantaneous hot water system Rinnai makes. The Rheem Stellar is the best natural gas water heater tank.

Solar hot water system boosters can be electric, natural gas or LPG.  Arguably, the best solar hot water heater is gas boosted. Solar hot water system option may take a number of days to install and are very expensive compared to the alternatives.

Best Natural Gas Hot Water Heater

The best natural gas hot water heater would be the same as for LPG gas water heaters. The best natural gas water heater generally has all of the same performance, features, quality, warranty and price as the corresponding LPG unit.

So the best natural gas instantaneous (instant) continuous hot water system and the best natural gas hot water heater tank would be the same brand and model in LPG. The best instantaneous natural gas hot water heater brands would still include Rinnai and Rheem. The best natural gas water heater tank is the Rheem Stellar.

Compare Best Electric Hot Water Heater System

Compare best electric hot water heater systems are probably from Rinnai, Rheem or Dux. The Rheem best seller would be Rheem's best electric hot water system comparison.

Compare What is the Best Hot Water Heater System Type

Compare best hot water heater system types including solar, gas, electric, heat pump, tank and tankless continuous flow whilst the best gas hot water heater brands include Rinnai, Dux, Rheem, Bosch and others. 

Electric heat pump hot water units can be very noisy and struggle in really cold weather.

On demand gas water heaters are also called tankless or continuous flow.

Compare the Best Hot Water Heater System Prices

Compare gas hot water systems prices for all the best gas hot water heater brands including Rinnai, Bosch, Kelvinator, Rheem, Dux and AquaMAX.

Click on your category of interest to compare best hot water heater system prices:

Best Gas Instantaneous Hot Water System Prices

Best Hot Water Heater System Tank Prices

Solar Hot Water Heater System Prices

Hot Water Service – A Review of Your Choices

Compare Best Electric Hot Water System Tanks

Electric Storage Hot Water Systems

The best electric hot water system tanks or cylinders have been the most common hot water system in Australia for decades. 

Unfortunately, with the rising cost of electricity and the high greenhouse gas emissions associated with generating the required electricity, these units are falling out of favour.  
In fact, the government has passed legislation to try and limit their use.
Electric water heaters that heat all day are your most expensive option.  
Off peak electric storage units are better, as off peak electricity tariffs are lower.
However, as they only heat water at night, they need to be quite large to make sure you don’t run out of water during the day. 
So, some of the electric savings is offset by the fact that you need to heat a larger tank.  
The bigger tank would also cost more to purchase.
Still, many people with an old electric unit are tempted to replace like-for-like and continue using an electric storage unit. 
It is a quick, one day fix and the upfront costs are not prohibitive.  However, the long term disadvantages need to be considered.

Compare Gas Hot Water Systems Review - Storage Tanks

Gas Storage Hot Water Systems

A gas hot water systems review would involve a comparison between gas storage tank systems and the better tankless continuous flow hot water systems, sometimes called instantaneous gas hot water systems.  

The installed cost of a gas storage unit is close to that of the electric units, especially if you already have gas at your home. 

A gas storage hot water system appears similar compared to an electric tank or cylinder, the primary difference is that the electric heat element is replaced with a gas burner.

Gas storage hot water units are energy efficient, particularly if you choose one of the new 4 or 5-Star models, and they have much lower greenhouse gas emissions.  Compare that with the best gas instantaneous (instant) continuous hot water systems now available in 7 Star units.

Also, there are no time-of-day tariff issues with gas. Even the best electric hot water heater may be subject to time-of-day tariffs.

This means that gas storage units do not need to be as large, as the gas burner can operate whenever required.

You can also choose a gas storage system no matter where you live, as they are available in both natural gas and LPG models.  
Installation is normally accomplished within one day.

Gas Boosted Solar Hot Water System

 gas boosted solar hot water system

A gas boosted solar hot water system can have some of the lowest running costs and greenhouse gas emissions, but they are typically the most expensive to install, with installed cost as much as 4X that of a storage unit, even with rebates. Gas boosted solar hot water system are equipped with a booster unit for periods without sufficient sunlight. 

Solar hot water system boosters can be electric, natural gas or LPG gas boosted solar hot water system  

It is important that you purchase a  gas boosted solar hot water system with a sufficient number of panels and tank storage, so that the booster is not overused, or the running costs will be higher.  

Your roof configuration also needs to be compatible with a  gas boosted solar hot water system. 

The gas boosted solar hot water system option may take a number of days to install.

Compare Heat Pump Hot Water Systems

Hot Water Heat Pumps

Heat pump hot water systems heat your water by extracting heat from the ambient outside air, in the same way that a reverse cycle air conditioner would heat a room.  Some say heat pumps are the best electric hot water heater.

The heat pump hot water is kept in a tank, similar to storage systems.  

Heat pump hot water can be quite efficient and have low greenhouse gas emissions but, once again, the upfront costs are substantial.

Heat pumps also have a couple of weaknesses that have caused them to lose popularity in the last few years.  
Because they essentially incorporate an air conditioning unit, there are many more moving parts and the maintenance costs tend to be higher than for any of the alternatives.
They also have the dubious distinction of requiring as many as 3 trades for repairs: an air conditioning mechanic, a plumber and an electrician.
The other issue is noise.  
If you live in close proximity to your neighbours or if you like to leave your windows open, the compressor and fan noise can be problematic. 
This is especially true if the unit is set-up to run off-peak.  
It can easily need to run all night because of the colder ambient temperatures after dark.

Heat pump hot water units can be very noisy.

Compare Best Gas Instantaneous (Instant) Hot Water System Review

Gas Hot Water Systems Review - Tankless Continuous Flow

Compare the best gas hot water instantaneous (instant) hot water system reviews for best gas hot water heater brands primarily involves flow rates and star ratings, as well as brands, to find the best gas hot water instantaneous (instant) hot water system.

Tankless instantaneous continuous flow gas hot water systems are better as they provide hot water on demand whenever you turn on the tap, as you need it.
These units only heat the water as it passes through so there is no storage tank.  
This also means you never run out of hot water. 
A tankless gas instantaneous hot water system is better because you only need to heat the water to 50°C, as the prevention of bacterial growth is NOT an issue with tankless units, as it is with all of the other alternatives that have tanks.
While the running costs are not quite as low as solar and heat pump units, the upfront costs are much lower. 
Greenhouse gas emissions are also much lower than electric storage.  
Available in both natural gas and LPG versions, these units are very energy efficient, with 5-Star or better ratings. 

Compare Best Electric Instant Hot Water Systems

The best electric instant hot water system are also available. However, they are not very common.

As they are used during the day, you pay the full electricity tariff, as opposed to off-peak electric storage units.

This higher cost of operation is the main reason for the rarity of instantaneous electric hot water systems.

How a Tankless Water Heater Works

Schematic of continuous flow hot water heaterIn summary:

• Cold water flows into the water heater when a hot water tap is opened inside your home.

• The water flow is detected by a sensor that ignites the gas burner, to heat the water in the heat exchanger.

• The water typically follows a serpentine pattern through the heat exchanger, absorbing as much heat as possible.

• An electronic control unit modulates the gas burner to maintain a set water temperature.

See all the details on:

How a Tankless Hot Water Heater Works

Combustion Efficiency & Star Ratings

When it comes to energy efficiency, many believe that 6-7 Star tankless gas continuous flow instantaneous hot water systems are the best hot water system, especially based on the affordable initial investment.

Star ratings encapsulate both a start-up heat up factor for each appliance and combustion efficiency.

As a result, combustion efficiency for each star rating can vary a bit.

However, if we look at combustion efficiency in isolation, it does make it a bit easier to understand what it all means.

The following are all approximate but will give you a good idea what to expect based on what star rating you choose:

4 Star = 73%

5 Star = 80%

6 Star = 87%

7 Star = 94%

Size and Aesthetics

Bosch 26e

At about the size of a small suitcase, tankless gas continuous flow instantaneous hot water systems are the best looking, as they are much smaller than a traditional storage tank heater. Mounted flush against the wall, the smaller tankless gas continuous flow instantaneous hot water systems are better, as they take up less space and are also more aesthetically pleasing, as they don’t dominate the exterior appearance of your home.

Storage tank hot water heaters are big, especially the electric off-peak models. 

Even when installed outdoors, the size can get in the way, particularly with today’s smaller lot sizes. 

Having this large object next to your house also does nothing for the appearance of your home.

So, when considering size and aesthetics, once again tankless gas continuous flow instantaneous hot water systems are the best hot water system.

Health & Safety

Storage tank hot water heaterWith storage tank water heaters, there is the potential for bacteria growth within the tank. 

The World Health Organisation -- WHO -- recommends that stored hot water be kept at a minimum of 60°C. 

Unless a minimum of 60°C is maintained, hot water tanks can be a breeding ground for Legionnaires’ disease, or Legionellosis, that is caused by a bacterium, Legionella pneumophila. 

It is a respiratory disease that can cause severe pneumonia and is sometimes fatal.

However, Canadian studies have shown, even when the thermostat is set at 60°C, a high percentage -- approximately 40% -- of electric water heaters remain contaminated. 

This is because of the lower temperature, of about 30°C to 40°C, at the bottom of the tank.

A tankless gas continuous flow instantaneous hot water systems is best at the prevention of bacterial growth, as there is no stored water in which bacteria can breed. 

Tankless gas continuous flow instantaneous hot water systems can also be better set at 50ºC, so the risk of scalding is greatly reduced without the need of a tempering valve.

What Size Hot Water System Do I Need?

Don't Calculate by Number of People or Bathrooms

The sizing information available is very confusing because manufacturers, and others, are trying to provide a simplified answer to a complicated question. 

Some suggest that you calculate by the number of bathrooms in your home while others say to go by the number of people in your family. 

Also, in many cases, their recommendations are based on the worst case scenarios, assuming higher consumption than your actual water use.

Buying Too Large Wastes Money

The result is that many people end up buying a larger system than they actually need. 

This costs them extra money when they buy the hot water system and will increase the ongoing operating costs, in many instances.

Factors to Really Consider

Simultaneous use is one of the fundamental determining factors.  

The number of people in your home combined with how and when they use hot water is the key. 

  • Do they all take showers at the same general time of day? 

  • Do they take showers simultaneously in different bathrooms?

  • Do the showers have WELS 3 Star Rated Showerheads (maximum 9L/Min) or standard 18 to 25L/Min showerheads?

  • Do some prefer baths, which use more hot water? Is the bath or spa oversized, requiring even more hot water?

  • Do you run the washing machine, using hot or warm water, while people are showering?

  •  Is your dishwasher connected to the cold or hot water? If hot, do you use it while hot water is being used elsewhere?

Showers Are the Key

Showers use the most hot water in a home.  People generally shower for 5 to 10 minutes. 

Assuming you have a 3 Star shower head and you mix in some cold water with the hot, the typical hot water consumption would probably be in the 7 litres per minute range. 

If you also assume an 8 minute shower, you will consume about 56 litres of hot water per shower or a family of four would consume 224 litres. 

The use of WELS (Water Efficiency Labelling and Standards) 3 star rated showerheads is an important factor in saving water and energy whilst reducing the size and cost of the hot water system required.

Hot Water Tank ExampleRinnai HOTFLO 170 gas hot water system

In the above example, if all four people take their showers in the morning, you would only need a storage hot water system with 224 litre first hour capacity, regardless of how many take showers at exactly the same time.  

This all presumes that you are not using any other hot water devices at the time.  

The use of additional hot water, after the shower period, would depend on the hot water system’s recovery time required to achieve full temperature.  

So, with a larger family or house guests, a bit of scheduling may be required to avoid the need for a larger unit.

Off Peak Electric Issues

Off peak electric storage units are a completely different story. 

Inasmuch as they only heat water at night, they need to be quite large to make sure you don’t run out of water during the day. 

So, some of the electric savings is offset by the fact that you need to heat a larger tank. 

The bigger tank would also cost more to purchase.

Tankless Hot Water Example

Bosch 21e tankless gas hot water systemFor a tankless continuous flow unit, it would depend on how many showers are being used simultaneously. 

Using the example above, if it’s two showers, then you only need a unit with a minimum flow rate of 14L/min. 

If you have 3 people showering at exactly the same time, you would need a minimum 21L/min.  

This does assume that you are not using other hot water devices simultaneously. 

Tankless gas continuous flow instantaneous hot water systems are the best, as recovery time is not an issue with continuous flow units, so even a large family with guests would not run out of hot water.

 

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The information in this article is derived from various sources and is believed to be correct at the time of publication. However, the information may not be error free and may not be applicable in all circumstances.