Solahart Atmos Eco 180HDC

Heat Pump Water Heater

Compact and efficient, the Solahart Atmos Eco 180HDC is a smart alternative to small electric water heaters, offering reliable performance even in colder climates.

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1-3

Family size

178^L

Capacity

7^*yr

Warranty

70%^#

Water Heating Energy Savings

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Solahart Atmos® Eco 180HDC: Key Attributes

Why Atmos Eco is a smart choice

The Solahart Atmos® Eco 180HDC Heat Pump is a new-generation, 178-litre renewable water heater ideal for smaller households. Engineered to perform in a wide range of Australian conditions, it uses R513A refrigerant with a low Global Warming Potential (GWP) and advanced microchannel technology to provide fast, uniform water heating, even in ambient temperatures as low as -7°C.

This system is a smart, energy-efficient choice for homes where installing a conventional solar water heater may not be practical. It draws heat from the air to warm water without relying on direct sunlight, helping reduce your water heating energy use and carbon emissions.

High COP OF 4.9

High efficiency with a Coefficient of Performance (COP) of 4.9 @ 19°C ambient temperature (1). Delivers outstanding performance, helping reduce your energy consumption and running costs.

Cold Climate Performance

Operates in temperatures from -7°C to 43°C, making it ideal for a wide range of Australian environments. It is also suitable for harsh water conditions.

Significant Energy Savings

Can cut water heating energy use by up to 70% compared to conventional electric systems in Zone 3. (2)

User-Friendly LED Controller Display

Simple to operate with clear temperature and system status information.

Microchannel Heating Technology

Wrap-around design maximises heat transfer, ensuring uniform and faster water heating.

Government Incentives Eligible

Qualifies for STC government incentives to help reduce upfront costs. May also be eligible for additional incentives in some states.

Specifications

Family Size
Family Size	1-3

Solahart Warranty
Solahart Warranty (years)	7*

Technical
Storage Capacity (L)	178
Boost Capacity (L)	168
Dimensions H x W x D (mm)	1810 x 532 x 576
Weight - Empty (cartoned) (kg)	116
Weight - Full ( kg)	284
Temperature Setting (°C)	60
Maximum Rated Power Input @ 240 V (Watts)	3500
Rated Heat Pump Power Input (Watts)	683
Refrigerant	R513A
Element Size (kW)	2.4
Noise Rating @ 1 m (dB(A))	48
IP Rating	IP24
Average COP @ 19°C ambient air temperature & from 10°C to 60°C water temperature *	4.9
Average Heat Pump Heating Capacity @ 19°C Ambient air temperature & from 10°C to 60°C water temperature * (kW)	3.2

Water Connections and Pressure Settings
Water Inlet/Outlet Connections	Rp 3/4
Temperature Pressure Relief Valve Setting ( kPa)	1000
ECV Setting (not supplied) (kPa)	850

Maximum Mains Supply Pressure
With ECV (kPa)	680
Without ECV (kPa)	800

Water Heating Energy Savings
Water Heating Energy Savings (#)	70%

* An average Coefficient of Performance (COP) value of 4.9 was measured under test conditions with an ambient air temperature of 19˚C/15˚C (Dry Bulb/Wet Bulb) over the entire heat-up process, heating of the water from 10˚C to 60˚C during water heater operation and a power supply of 240 V~ 50 Hz. The Heat Pump average heating capacity in Watts and its water heating capacity in Litres / hour were calculated from the results of this test. The heat pump water heater performance tests were conducted to AS/NZS 5125.1:2014. Note that the actual COP of the product at any given time will be impacted by a number of factors, including the ambient air and cold-water inlet temperatures at the place of installation and time of day/season of operation.

The Coefficient of Performance (COP) for a heat pump is the ratio of how much useful heat it produces for water heating to the power input into the water heater. The higher the COP number, the more efficient the heat pump is.

How it works

The efficient heat pump technology extracts energy from the surrounding air. Ambient warmth is used to convert the refrigerant within the sealed system into a gas. The gas is then compressed to generate even more heat, which then heats the water in the tank. What’s more, this process can work day or night, in sunshine and rain, all year round.
When hot water is drawn off, and cold water enters the tank, the thermostat activates the fan and the compressor. The operation of the compressor causes a pressure difference within the sealed refrigeration system. This pressure difference causes the refrigerant to move around the sealed system. The refrigerant enters the evaporator as a liquid. As the refrigerant absorbs heat from the atmosphere, it changes state, at low pressure, from a sub-cooled liquid to a super-heated vapour or gas (evaporates). The vapour then enters the compressor and obtains more heat, known as heat of compression, and passes into the heat exchanger as a super-heated vapour at high pressure.
As the refrigerant passes through the microchannel heat exchanger wrapped around the storage cylinder, it gives off heat, which is absorbed by the water inside the cylinder. As the refrigerant gives off heat, it cools and changes state back into a liquid (condenses). The refrigerant then enters the evaporator again, and the cycle is repeated. The resulting cold air is then discharged through the air outlets back into the atmosphere. This process continues whenever heating is required until the water in the storage tank reaches its hot water temperature set point.

Introducing Solahart Atmos Eco 180 Heat Pump
Downloads

Solahart Atmos® Eco Owner's Guide and Installation Instructions (PDF, 1720kb)

Solahart Atmos® Eco Data Sheet (PDF, 253kb)

*Warranty Details
- 7 years cylinder supply
- 3 years cylinder labour
- 3 years sealed system supply and labour
- 2 year parts supply and labour
*The warranty periods above apply to installations in a single-family domestic dwelling only. For further details, please refer to the Owner’s Guide. See the Solahart warranty set out in the Owner’s Guide and Installation Instructions. For more details call Solahart Australia 1300 769 475.
Without limiting the warranty periods shown above, a 5-year whole-of-product warranty applies to the installation of a Solahart Atmos Eco 180HDC Heat Pump where:
a) A hot water rebate has been received under Solar Victoria’s Solar Homes Program for a heat pump water heater installed from 1 July 2023, and / or
b) Victorian Energy Efficiency Certificates (VEECs) have been created for a heat pump water heater installed from 1 February 2025.
For further details, call 1300 769 475. Proof of receipt of the rebate and / or proof of VEECs being created, i.e. installation quote showing number of VEECs and dollar value, plus proof of purchase (as applicable) must be produced at the time of the service call.
All other applications have a 3/1/1 warranty; 3-year cylinder supply, 1-year cylinder labour, 1-year parts, including labour.
¹ See datasheet for detailed specifications.
² Energy savings of up to 70% in Zone 3 based on TRNSYS modelling on hot water energy consumption when replacing an electric water heater of a similar size with a Solahart Atmos^® Eco 180HDC Heat Pump. Any savings will vary depending upon your location, type of water heater being replaced, hot water consumption and fuel tariff.