Unlike many other appliances around your home, hot water systems need to be replaced in a hurry. While you might be able to go without an air-conditioner or oven for a few days or even weeks, not having any hot water for a shower is something that needs to be fixed as soon as possible.
A rushed decision in a time of crisis however can sometimes end in disaster. Not only is there is the risk that you will purchase a system completely inappropriate for your needs, but also end up with a system that will cost you more money in the long term.
Here is a quick buyer guide to help you with the purchase of a hot water system that’s right for your and your family!
Energy efficiency
According to the Energy Rating website, water heating can account for as much as 25% of your household energy bills so it’s easy to see how you could literally save thousands of dollars over the life of the unit with the correct purchase decision. Which hot water system to buy can also have a big impact on the environment with some older systems producing the same amount of greenhouse gas as an average sized car!
Heating method
First of all, you will need to decide which heating method you are going to use. Electricity, Gas, Heat Pump or Solar.
Electric hot water systems
Arguably, these systems are the most effective as 100% of the electrical energy is converted into heat. However, fluctuating and often increasing electricity costs can make this the most expensive heating option.
- Electricity is currently more expensive than gas.
- It is not as environmentally friendly.
- Electrical units are cheaper to install.
- Able to be installed both indoors and outdoors.
- This heating method is available to all homes.
- Can be expensive to run, depending on if you are running on peak or off-peak electricity times.
Off peak electricity is at a specific time of day, when electricity prices are cheaper.
Use Energy Australia’s table to see whether you are eligible for off-peak rates.
Gas hot water systems
Gas hot water systems are available in two forms: natural gas and liquefied petroleum gas (LPG), the more costly option. Natural gas is efficient and is more eco-friendly than other options (such as electric), though the installation of larger gas pipes may be required.
- You will need to have the correct connection to use this method.
- It is cheaper than electricity.
- A more environmentally friendly option.
- Less carbon emissions.
- Gas units can be more expensive to install.
- Usually installed outdoors. Would need a flue to be installed indoors.
Heat pump hot water systems
Heat pump systems come in two forms:
- Air source heat pumps (these are most effective in warm, humid climates)
- CO2 heat pumps (similar to air source heat pumps but can be used in cooler areas)
The costs associated with running a heat pump may vary, which is why it is a good idea to speak with an experienced hot water plumber to find the right heat pump for your budget.
- This method heats the water tank by extracting heat from the air.
- A heat pump requires a compressor which can be noisy.
- Usually installed outdoors due to ventilation needs.
- They work best in warmer climates.
Solar hot water systems
Solar hot water systems can provide as much of 90% of your hot water for free and without any greenhouse emissions, though most properties benefit from having a backup or “boosting” option, such as a gas or electric heater.
- This method can be expensive to install.
- However, is very inexpensive to run.
- The solar panels will need to be installed in an area with lots of sunlight.
- Can be boosted through a gas or electric system.
Traditional storage system or continuous flow?
Once you have decided on your heating method, you will then need to choose the type of hot water system you will be using. A storage water heater or continuous flow system.
Storage water heater
A storage water heater is a more traditional system. The tank fills with water which is heated to a hot temperature and stored until it is needed. This temperature is monitored by a thermostat which heats the water if it becomes too cold, however if the tank is emptied the new water needs to be heated again.
Storage systems can operate on mains pressure or from a gravity feed (also known as a constant pressure tank). While the tanks are insulated, there is some degree of heat loss from the tank, the system’s fittings, and the pipes.
Pros
- Generally cheaper to purchase
- Cheap installation costs (especially for gas)
Cons
- Expensive to run
- High carbon emissions
- Take up large amounts of space
- Water temperature drops over time as the tank cools
- Can run out of hot water
Continuous flow system
Instantaneous units only heat water when it is needed (when a hot water tap is turned on). Outside these times water is not heated and no energy is used.
The benefit of having a continuous flow system (available only for gas or electric hot water systems) is that you will never run out of hot water. The water isn’t overheated and does not need to be tempered with cold water, which can help save energy and reduce any risk of burns.
Pros
- Cheaper ongoing costs
- Take up a small amount of space
- Low carbon emissions
Cons
- More expensive initial purchase
- More expensive to install
Top hot water system considerations
When it comes to choosing the best hot water system for your home, three factors will need to be taken into account: your lifestyle, your location, and your budget.
- The size of your household
The number of people in the home and when hot water is consumed are critical factors when considering your hot water system options. For instance, if more than one person is showering at once, or if you run the washing machine, the dishwasher, and the bath at the same time, the system would need to be able to cope with these demands.
- The location and availability of space
Depending on your location and the layout of your home, some systems may be too large or cumbersome to fit onto your property.
- The cost
The initial cost of each system will differ, but don’t let that be your only guide. Consider the lifetime costs (i.e., operational, maintenance, and repair costs) as well, particularly if you are thinking about retrofitting or converting an existing unit.
Questions to ask yourself
It’s important to ask yourself the following questions. If you are unsure, ask your plumber for their advice and help.
- What is the size of our house (including the number of people)?
- How much hot water does our household use?
- What is the main time of day we use hot water?
- What energy source is available for my home?
- Where can the hot water system be installed?
- How much am I willing to spend on a system? (Including installation and maintenance).
Remember the star ratings!
If you’ve ever looked at appliances before, you may remember noticing a label with stars on it. This is your energy rating label telling you how energy efficient each appliance is. (These are now an Australian Government requirement for all new appliances). Six stars is the most you can have, the more stars means the more savings!
There is also an energy consumption score on the label. The lower the score, the cheaper the appliance is to run.
Choosing the right hot water system for your home
Purchasing a hot water system may be something you will do only a handful of times in your life. But spending the time investigating and researching your options with your local plumber means having a system that will save you money, reduce your carbon footprint, and provide your household with the optimal amount of hot water.
Interested in learning more about your Sydney hot water system options? Speak to an experienced hot water plumber at JEDI Plumbing today and call 0411 774 381.
