Sanden Eco Plus

The Sanden Eco Plus Heat Pump Hot Water System

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Frequently Asked Questions about the Sanden "Eco® Plus" Hot Water Heat Pump

1 - Is the Sanden "Eco® Plus" Hot Water Heat Pump System an energy efficient hot water system? How does it compare to a conventional electric hot water system?
You can save up to 80% of your conventional electric hot water energy costs! The Sanden "Eco® Plus" Hot Water Heat Pump System uses only 22% of the energy required by an electric storage hot water system

2 - What are the benefits of the Sanden "Eco® Plus " Hot Water Heat Pump System?
Not only does a Sanden "Eco® Plus" Hot Water Heat Pump System help save on energy costs, it also delivers:
(a) The Heat Pump Unit

Innovative technology -- up to 50% faster heat recovery than currently available Hot Water Heat Pumps.
Industry leading quality & performance, with the highest level of STC values of currently available Hot Water Heat Pumps.
Class leading warranties, backed by Sanden’s 30 years of operation in Australia.

(b) The Stainless Steel Storage Tank

High quality, extra long life duplex stainless steel cylinders.
Two x 315 litre Tank sizes to suit your space requirements (tall with a reduced diameter or short with an increased diameter)
Also available 260L and 160L models
Fully insulated for extremely low heat loss
Safety pressure and temperature relief valve
Mains pressure rated

3 - How does a heat pump hot water system work?
The Sanden "Eco® Plus" Hot Water Heat Pump System operates like a refrigerator in reverse. It contains a fan that forces air through an evaporator that contains a refrigerant. The heat in the air passes through the evaporator and is absorbed by a natural refrigerant, R744 (CO2), which is ozone friendly and does not contribute to global warming.
The warm gaseous refrigerant is circulated in the system via a compressor. As it passes through the compressor, its pressure rises, as does its temperature. This hot refrigerant then passes through a heat exchanger to heat the water, which is finally pumped to the storage tank

4 - What sizes are the Sanden "Eco® Plus" Hot Water Heat Pump System available in?
Sanden has several hot water tank sizes to choose from:

160 litre .
250 litre
315 litre

Which one you choose depends on the space requirements of the location where you are installing it. Dimensions of tanks lower down the page.
Please speak to us about making the best choice for your needs and location.

5 - I don’t understand the use of a CO2 refrigerant by the Sanden "Eco® Plus" Hot Water Heat Pump System. Isn’t CO2 a greenhouse gas and therefore harmful to the environment?
Yes, but CO2 has a Global Warming Potential of 1. Carbon dioxide is the baseline measurement of how it will contribute to global warming for a given mass.
Our system utilizes less than 1 kg of R744 (CO2) as a refrigerant contained in a closed system at the factory. The installer does not need to charge the heat pump on site.

6 - Why does Sanden "Eco® Plus" Hot Water Heat Pump System use CO2 as a refrigerant?

There is far less environmental impact (i.e. No ozone layer depletion and minimal global warming) than other commonly used refrigerants, should the system leak.
There is a much higher efficiency, thereby allowing more heat to be transferred to the water, for less energy used (i.e. Excellent thermodynamic ability).

7 - What is the noise level of the Sanden "Eco® Plus" Hot Water Heat Pump System?
The unit is rated at 37dB, which is almost silent. By comparison, a whisper is around 30dB and inside a library is approximately 40dB.

8 - What is the life expectancy of the Sanden "Eco® Plus" Hot Water Heat Pump System?
The Sanden HWHP is designed to last for 15 years. The high quality, weather resistant construction of the "Eco®" Hot Water Heat Pump System outdoor module carries a warranty of 6 years, whereas the high quality, extra long life stainless steel storage tank carries a class leading 15 year pro rata warranty

9 - At what temperatures will the Sanden "Eco® Plus"Hot Water Heat Pump System operate effectively?
The Sanden HWHP will operate effectively between minus 10 and plus 43 degrees C, without the need for an electric booster element. It is also fitted with in built freeze protection, making it suitable for all climates.
Compared with a conventional electric system, Sanden’s Japanese-made heat pump features up to 50 per cent faster heat recovery. In ambient air of 20oC, it takes just 4 hours to heat 315 litres of water from 17oC to 63oC.
An in-built freeze protection cycle makes the Hot Water Heat Pump system suitable for all of Australia’s climates throughout the entire year.
Further, it has an automatic heating cycle, ideal for use with off-peak power and does not require a backup booster.
All Sanden stainless steel tanks are Australian-made, fully insulated for minimal heat loss and have been mains pressure rated.
10 - Does the Sanden "Eco® Plus" Hot Water Heat Pump require the assistance of an electric booster element to heat water, when outside ambient temperatures are very low?
No, unlike other competitor HWHP systems, the Sanden Eco® HWHP system does not require an electric booster element

11 - Can I operate the Sanden "Eco® Plus" Hot Water Heat Pump System on Off-Peak Tariffs?
Yes, please refer to the Installation Manual for details. There are no special settings for off peak connection. Simply ensure that the off peak tariff supplies a minimum of 5 hours continuous power to the Sanden HWHP.

12 - Tank sizes and typical applications:

A typical Sanden Heat Pump

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Brochure
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Tank Size	No of persons	Typical dwelling	Off peak / Continuous?
160 Litre	1-2	Unit / Town House	Continuous only
250 Litre	2 - 4	Residential	Both
300 Litre	4 - 6	Residential	Both
315 Litre	4 - 6	Residential	Both

Model	Tank Size (capacity)	Dimensions
GAUS-160FQTS	160 Litre	Height 970mm, diameter 621mm
GAUS-250FQTS	250 Litre	Height 1428mm, diameter 621mm
GAUS-300FTQS	300 Litre (Tall)	Height 1891mm, diameter 580mm
GAUS-315FTQS	315 Litre	Height 1748mm, diameter 621mm
GAUS-315FQTV (Vitreous)	315 Litre	Height 1626mm, diameter 638mm

* please note, tank sizes can change, correct at April 2024

13 - Is water quality an important consideration for the Sanden "Eco® Plus" Hot Water Heat Pump System?
Yes. Please refer to the Installation Manual for details. Importantly, no warranty applies to the heat pump unit and the storage tank, where the chloride level exceeds 200 mg/litre and the pH is less than 6.0. If in doubt, it is recommended that water chemistry information be sought from your local council or water supplier.

14. What do I do if the Sanden "Eco® Plus" Hot Water Heat Pump System has a problem?
Firstly, review the Trouble Shooting Guide in the Installation Manual. If still unresolved, please Contact Us or the plumber you purchased your unit from. If you are unable to reach your Dealer/Installer, then please call Sanden on (02) 9791 0999

15 - If I go away from the house, can I turn the hot water heat pump off?
You can turn it off if you are away for an extended period. We recommend leaving it on, so the unit can automatically protect the quality of the water.

16 - Do I need to register my warranty?
Yes. For efficient processing of warranty claims, should they arise, please register your Sanden "Eco® Plus " Hot Water Heat Pump System here.