Thermann | FAQ

Help by category

Can’t find the answer to your question?

We’re here to help.

Contact us

Get Started

Questions you might have when replacing a hot water system.

  • How do I find a suitable hot water system replacement?

    The typical age of a hot water system before it needs replacing is generally 7-10 years. However, with advancements in technology, some are now expected to last for longer. Have a look at your warranty for guidance. For example, some gas continuous flow systems come with a 12-year warranty, so they are expected to live a bit longer. If you are finding you are constantly running out of hot water, your system may be too small for your needs. In this case it’s a good idea to discuss the option of a larger system with your plumber. If your system is relatively young, repair might be the best option.

  • How do I tell what system type I have?

    While there are many different hot water systems on the market, not all of them are easy to identify. There are a few simple things you can look for that may help you identify what type of system you have.

    Gas Storage:

    Gas storage systems are usually box shaped and will have 3 (usually copper) pipes running into them. They tend to also have warm gas coming out of the top of the system in the form of a vent. If you remove the front access panel, you will also see a blue flame known as a pilot light.

    Electric Storage:

    Electric storage systems tend to be round and have a little cap at the top. You will notice that there are only two pipes connected to the tank with a bulky panel with an electrical cable coming out of it. Electric systems don’t have any exhaust and have no odour.

    Continuous Flow:

    Continuous flow hot water systems are small rectangular boxes that have a little vent on the front. Continuous flow systems are usually mounted on a frame or directly onto the wall of a building. You should also see 3 copper pipes coming out of the bottom of the system, as well as 1 electrical cable. Some continuous flow systems also have a small display screen that displays different information about the system, typically the temperature of the water. This is known as a controller.

    Heat Pump:

    Heat pumps are quite large cylinders with a mesh vent at the top. You can usually hear a heat pump running. A heat pump also has an electrical cable and two copper pipes coming out of it. Some Heat pumps also have a control panel and/or a button. This button is known as a booster.

    Solar:

    Solar hot water uses a combination of a storage tank (and a continuous flow system) for gas boosted as well as a system in which water is pumped up onto your roof using either a series of black tubes or solar panels. If you can see pipe work leading up to your roof, and have seen a bank of tubes, or solar panels, there is a good chance that your water is being heated using solar energy. Solar systems are either electric where the tank is heated by either an element or they are gas boosted where the tank is filled by a continuous flow system in times where the sun is not as exposed. This is to avoid the water reaching unsafe temperatures leading to bacteria build up or legionella.

  • What do I need to consider when buying a hot water system?

    There are many factors to consider when purchasing a new, or replacing an old, hot water system. It is important to talk with your plumber about the following things:

    • How much hot water you use?
    • What are the potential costs and benefits of different hot water systems?

    • The time of day you use hot water?

    • Your house size?

    • How many people live in your household?

    • The energy sources available in your location?

    • The tariffs available to you?

  • What should I do when my hot water system stops working?

    If you are renting, your recommended action is to contact your landlord or real estate agent immediately for assistance. Your real estate agent may need a little more information about the specific system you have, so see if you can find all this out when you contact them. Photos can be a very handy tool. If you own the property, it is important to call a licensed plumber to diagnose the issue properly before taking any action. To assist your plumber, you may want to look for:

    • Leaks
    • Strong smells of gas
    • Louder than usual noises
    • Muddy or soiled water coming out of the tap
    • Check your water meter is not running faster than usual
    • Any flooding in the house.
  • What should I do when I find a suitable replacement?

    You need to make sure you choose the right person for the job – someone you’re comfortable with fixing your issues. There are a few simple things to consider when choosing a plumber. Firstly, they need to be licensed, so don’t be afraid to ask for that information. All reputable plumbers will have this information available. Plumbers generally require a Gas Fitting License to work on gas appliances, so check this one too when getting in touch with them. Secondly, you’ll need to make sure they can handle the type of work you have. If you’ve got a specialised solar system installed at your home, they may need to know this beforehand so they will be equipped to fix your issue.

    The following websites will assist you in finding the licence number of your selected tradesperson:

    Victoria

    New South Wales

    ACT

    Queensland

    South Australia

    Tasmania

    Western Australia

  • Where can I buy Thermann from?

    Thermann hot water systems are available from all Reece Plumbing stores in Australia and New Zealand.

  • What’s the difference between a storage system and a continuous flow system?

    A storage system you can think of as a giant kettle. It is either electric, where the water is heated using elements within the tank, or gas, which is heated by a series of flames or ‘burners’ underneath the tank. Storage tanks come in a vast array of different sizes, but the principal is still the same. They are designed to keep the water inside the tank at a constant temperature ready to be used at any time. However, once the tank is drained of hot water, the tank will need to refill and be brought back to temperature again. This is called recovery.

    A continuous flow hot water system heats the water as it is needed. When you turn on your tap, the burner inside the system heats the water as it flows through the system and then into your house. This means that once the system is running, you will have unlimited hot water.

  • How do I know if my Hot Water system uses gas or electricity?

    Although to the untrained eye, hot water systems can look very similar, there is usually a few simple things to look for to identify which hot water system you have:

    Gas systems:

    • 3 copper pipes
    • Exhaust fumes
    • Typically, a box shape

    Electric systems:

    • 2 copper pipes
    • No exhaust
    • Has a power cable

High Efficiency Systems

Questions you might have about our high efficiency hot water systems.

  • What is the most efficient hot water system?

    While there are many different factors that go into what makes a hot water system efficient, generally the order of efficiency would consist of the following:

    Solar Boosted:

    These systems use the sun’s energy to primarily heat the water. In cases of high sun exposure, a boosted solar system can use almost 100% solar efficiency. This would mean that it would cost next to nothing to heat your water.

    Gas Continuous Flow:

    Gas continuous flow only uses the gas to heat the water when you need it. This means that when you don’t need hot water, the system will shut off until it is needed again. Gas continuous flow systems use a star rating, with the most common being 6 star.

    However, Thermann has a system that is of a 7 star equivalency. The Thermann C7 uses the exhaust gases to pre-heat the water creating a faster and more efficient water heating system.

    Heat Pump:

    A heat pump works much like a refrigerator, but in reverse. Heat pumps turn a special gas into vapour by drawing in the ambient air and pressurising it, causing the vapour to hear up. . This vapour is then pumped around the water tank using a special condenser. This heats up the water inside the tank and then you’re your home. Because the main fuel source is essentially air, a Heat Pump is up to 4 times more efficient than that of an electric storage tank.

    Storage:

    Storage systems also have a star rating which indicates their efficiency, however storage systems are constantly keeping the water in the tank up to a constant temperature, so they inherently use more electricity and/or gas

  • What hot water systems are eligible for rebates?

    Rebates for hot water systems vary per state and per system. You can find out more information from Energy.gov.au

    and Cleanenergyregulator.gov.au

  • What is more efficient, gas or electricity?

    There are several factors that attribute to the consumption of either gas or electricity in a hot water system. Heat loss is an important factor when it comes to hot water, as the more heat that escapes (and is therefore unused) the less efficient the system will be.

    Thermann storage systems have a thick layer of foam around the tank to ensure that there is minimal heat loss, and efficient continuous flow systems, such has the C7, use clever ways to capture otherwise unusable heat.

    All systems will have an energy rating, which will outline the system’s gas or electricity consumption. You can find out more from Energyrating.gov.au.

    It is also important to consider the price of electricity and gas in your area. Prices for Gas and Electricity are different per state and can be monitored at https://www.energymadeeasy.gov.au/

    Speak to your plumber about what the best option for your situation would be.

Gas Systems

Questions you might have about our gas hot water systems.

  • What type of systems run on gas?

    Thermann has a range of both Liquid Petroleum Gas (LPG) and Natural Gas (NG) systems:

    Continuous Flow

    Gas storage

    Gas Boosted Solar

    It is important to note that some gas systems require different pressures and volumes to run effectively. It is therefore recommended to speak to your plumber about what gas infrastructure you have on site and what is the best system for your situation.

  • What are the benefits of gas?

    Both LPG and Natural Gas have benefits when it comes to being a heat source for hot water. Here are some of the main benefits of gas hot water systems:

    • Faster heat recovery
    • Generally cheaper to run electric storage systems
    • Have high efficiency options such as the Thermann C7
    • Generally will take up less space

    Speak to your plumber about the benefits of gas hot water systems.

  • If I have an electric system, can I switch to gas hot water?

    This will depend on what infrastructure you have on the premises. If you have gas on site, then it is possible to switch to a gas system, however there are a couple of things to consider:

    Is the system inside or outside?

    For indoor especially, you will need to consider the space you have, is there room for fluing (Exhaust fumes). What is the price of gas in your area?

    What size gas line there is?

    Some systems require a larger gas line to run. This means that you may need to consider having your plumber upgrade your gas line.

    Speak to your plumber about whether switching to a gas system is the right thing for you.

    To find a plumber near you, visit myhotwater.com.au

  • Do I have to service a gas hot water system?

    We recommend a six-monthly service to be completed by the homeowner:

    Simply operate the Pressure & Temperature Relief Valve for approximately 10 seconds by lifting the lever on the valve to ensure water is relieved to waste through the relief drainpipe. Check to ensure the valve closes correctly.

    Also do a visual check for any leaks around your storage tank and pipework. We also recommend a service every 3 years by a licensed plumber to ensure optimum operation of the system.

  • Can I adjust the temperature?

    Small adjustments may be made, however in all cases please consult with a licensed plumber. Any adjustments to temperature can only be made by a licensed plumber.

    Find a plumber near you at myhotwater.com.au

  • How much do gas systems cost?

    Prices for gas systems can vary, but it is important to find the best system for your situation. The key is finding what system will bring you the most value and piece of mind. Click here to view the Thermann gas range

  • How long does a gas system last?

    This will depend on a lot of different factors including how often the system is used, the quality of the water, the outside weather conditions and the quality of the installation. As a rule, gas hot water systems will last 5-10 years. Thermann systems have a 5-15 year warranty depending on the system you choose.

    Click here to view the range

  • What happens if I run out of hot water?

    Is the Pressure & Temperature Relief Valve discharging too much water?

    Is one outlet (such as the shower) using more hot water than you think?

    Is there a leaking hot water pipe or dripping hot water tap?

    These questions will help inform your plumber as to what the issue with the system may be.

    To find local plumbers, visit myhotwater.com.au

Electric Systems

Questions you might have about our electric systems.

  • What type of systems run on electricity?

    Thermann has a range of systems that use electricity to power the system:

    Electric Storage

    Electric Boosted Solar

    Heat Pump

    It is important to know the electrical requirements for the system. While some systems can simply plug in, others will require a trained professional to ‘hard wire’ them to a power source.

  • What are the benefits of electricity?

    Electric hot water systems have benefits when it comes to being a heat source for hot water. Here are some of the main benefits of an electric hot water system:

    • Lower upfront costs
    • Can be installed inside and outside without the need for exhaust vents (Fluing)
    • Have high efficiency options such as the Thermann X Hybrid Heat Pump
    • Have a variety of different sizes including 25 and 50L which can generally fit in small spaces.

    Speak to your plumber about what the benefits of electricity hot water systems.

  • If I have a gas system, can I switch to electricity?

    Yes, if you have electricity on site, then an electric system can replace a gas system.

    However, there are some things to consider:

    The location of the pipework:

    There are some subtle differences when it comes to changing over from a gas system to an electrical one, including where the pipework is situated. Your plumber may need to alter the path of the water pipework in order to fit the new system.

    The existing gas line:

    You will need to ensure that the existing gas line is blanked off or ‘capped’ to prevent gas from leaking into the atmosphere. This must be done by a licenced professional, as this can be dangerous and a high-risk fire hazard.

    Consult with your plumber to see if swapping to electric is the right choice for your situation. If you need to find a plumber nearby, go to myhotwater.com.au

  • Do I have to service an electricity hot water system?

    We recommend a six-monthly service to be completed by the home owner:

    Simply operate the Pressure & Temperature Relief Valve for approximately 10 seconds by lifting the lever on the valve to ensure water is relieved to waste through the relief drain pipe. Check to ensure the valve closes correctly.

    Also do a visual check for any leaks around your storage tank and pipework, ensure the pump station is dry and free from moisture, and ensure all tubes are still dark in colour (only if safely visible from the ground).

    We also recommend a service every 3 years by a licensed plumber to ensure optimum operation of the system. Find plumbers available to service your hot water system at myhotwater.com.au

  • Can I adjust the temperature?

    Thermostats typically provide a small window of adjustment between 60 and 70 deg. Thermostats cannot be set below 60 deg. To adjust your thermostat, speak to your local licensed plumber for professional advice.

    Note: Hotter water increases the risk of scalding

  • How much do electricity systems cost?

    There are a variety of options when it comes to electric hot water systems. Thermann offers a range (hyperlink) of electric hot water systems that can suit almost any situation and lifestyle. With small and large, single and twin it is important to know what the best fit will be.

    The key is to make sure you have chosen the right system for your situation. To make sure you are getting the best system for your needs, speak to your licensed plumber and discuss your hot water needs

  • How long do electric hot water systems last?

    This will depend on a lot of different factors including how often the system is used, the quality of the water, the outside weather conditions and the quality of the installation. As a rule, electric hot water systems will last 5-10 years. Thermann systems have a 5-15 year warranty depending on the system you choose.

    Click here to view the range

Solar Systems

Questions you might have about our Solar systems.

Heat Pump

Questions you might have about our heat pumps.

  • Will solar work in areas that experience sub-zero temperatures?

    In most cases, yes. These temperatures won't stop the system from working, however the amount of hot water it produces each hour will slow down slightly. To dramatically impact the performance of the system, the temperature would need to remain below zero for extended periods of time, which is not a common occurrence in most parts of Australia.

    Also, thanks to its Active Defrost feature, this will protect the system from frost build up to ensure it gets back to generating hot water.

  • What is active defrost?

    Active Defrost is a protective function of the system designed to switch on when the frost monitor detects a build-up of frost.

  • Is the Thermann X Hybrid heat pump compatible with PV solar?

    Yes, the Thermann X Hybrid heat pump has been designed with the future in mind, with a compatibility for PV solar build into the system.

  • Does it have a booster element?

    Yes, the Thermann X Hybrid heat pump has a built-in booster element to provide a boost of hot water in times of high demand.

  • How does a Thermann X Hybrid heat pump Work?

    A heat pump uses a special gas to convert the ambient temperature of the atmosphere to produce a heat that wraps around the system to heat the water inside a tank. Because the main fuel source is essentially air, a Heat Pump is up to 4 times more efficient than that of an electric storage tank.

  • What rebates apply to a Heat Pump?

    Rebates for hot water systems vary per state and per system. You can find out more information from Energy.gov.au

    and Cleanenergyregulator.gov.au