hot water systems by 411SB86U


									Hot water systems
Every home has a hot water system that heats water using electricity (solar or heat
pump) or gas (bottled or reticulated) for ready use in the household.
The type of hot water system installed in your home depends on legislative
compliance, the number of bedrooms at the property, whether it is a detached house
or multi-unit accommodation or, if it has access to reticulated gas.

Electric Hot Water Systems
Electric water heaters that can heat water at any time of day are the most expensive
option and use the most greenhouse gasses.
In social housing properties, the department has commenced replacing electric hot
water systems, as they fail, with greenhouse gas efficient hot water systems (such as
gas hot water systems and heat pumps).

Gas hot water systems
Gas hot water systems burn either natural gas, delivered via a piped gas (reticulated)
network, or bottled gas (LPG) to heat water. There are two main types of gas water
heaters: storage and instantaneous.
Storage systems heat the water stored in a tank.
Instantaneous heaters, sometimes called continuous flow, don't have a storage tank
and only heat the water when it is required.
Using gas instead of electricity to heat your water can help to reduce your
greenhouse gas emissions, and may lower your water heating costs. Natural gas
however, is not available everywhere in Queensland.

Heat pumps
A heat pump is a type of electric storage water heater that extracts heat from the
environment (air, water or ground) to heat water.
A heat pump operates like a refrigerator, but in reverse. The air temperature is used
to heat a refrigerant, which converts to a gas. The gas is then compressed,
generating heat, which is transferred to the water. The refrigerant is expanded back
to a liquid and the cycle repeats.
Electricity is not used to directly heat the water but to move the refrigerant around the
system. This system uses much less electricity compared to an electric hot water
system and can save you approximately $400* a year on your energy costs.
Important: If you are having a heat pump installed in your home, your appliance will
need to be connected to Tariff 33 (for heat pump hot water systems over 125L
capacity) to guarantee the hot water flow. Being on any other tariff may interfere with
the operation and cost effectiveness of the heat pump hot water system.
Please refer to the Heat Pump Fact Sheet for more information.

Hot water system capacity
The table below provides a guide to the different storage capacity and flow rates for
hot water systems depending on the size of your home. The capacity of your hot
water system will affect which electricity tariff you can access.
     Type               Bedrooms               Capacity                     Tariff
Gas storage
                    1, 2 or 3            135 – 330 litre            N/A
(including Liquid
Petroleum Gas
                    4–5                  360 litre                  N/A
Gas continuous
                    2–5                  16 – 18 litre per minute   N/A
                                                                    Tariff 33 (preferred
                    1, 2 or 3            250 – 275 litre
Heat pump
                                                                    Tariff 33 (preferred
                    4–5                  340 litre
                                                                    Tariff 11 (preferred
                    1                    50 – 80 litre
                                                                    Tariff 11 (preferred
                    2                    125 litre
                                                                    Tariff 33 (preferred
Electric Storage    3                    250 litre
                                                                    Tariff 33 (preferred
                    4                    315 litre
                                                                    Tariff 33 (preferred
                    5                    400 litre or larger

Electricity Tariff Information
The information below is provided as a guide only. For more detailed information on
electricity tariffs, please contact your electricity supplier.
Domestic (Tariff 11) - This is the electricity tariff for general residential usage. When
there is only one electricity meter set up for one household, all electrical usage for
lighting, power and water heating is charged at the Tariff 11 rate. Electric storage hot
water systems smaller than 250 litres must connect to this tariff otherwise they are at
risk of running out of hot water.
Super Economy Plan (Tariff 31) - The Super Economy Plan is the cheapest tariff
available for water heating. This is because the electricity supply is available only at
low electricity-demand periods, such as at night when generators would otherwise be
Economy Plan (Tariff 33) - Only hot water systems with a capacity of 125 litres and
above can be switched to Tariff 33. The Economy Plan is up to 40% cheaper than
your normal Domestic Tariff 11. Electricity supply is available for at least 18 hours
per day.

Tenant Installations
Tenants can also apply to the department for approval to install a solar hot water
system or heat pump to their property at their own cost if they are in a house, duplex
or townhouse. Please contact your local housing service centre for more information
and conditions for installing your own solar hot water system or heat pump.

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