Skyline Energy - 21st Century Ecological Solutions
Skyline Energy - 21st Century Ecological Solutions Skyline Energy SX-17CC hydronic heatpumpHEAT PUMP WATER HEATERSSolar Electricity Sanden Heat Pump

Established 1999

Hydronic Heating - Heat Pumps - Solar Electricity - Solar Battery Systems - Sanden Hot Water

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Our Air Sourced Heat Pumps are 200% to 600% efficient, in OZ

Heat Pump Efficiency

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1300 552 976

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Skyline Energy


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Our Philosophy:
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  • Do it right or don't do it



Geothermal - Ground Sourced Hydronic Heating

Did you think Geothermal/Ground-Sourced Heating was the best ? WRONG!

We can make your money work harder for you ?

The most cost-efficient system for Australian weather conditions is an Air-Sourced system combined with year-round photovoltaics (solar electricity) and/or wind generated electricity!

An Air-Sourced Heat Pump:


             than a Geothermal Heat Pump for Australian weather conditions.

Our Cold Climate Air Sourced systems are about making YOUR money work for YOU not someone else . . .


Big freeze grips Europe:hydronic heating

"Snow and freezing conditions sweep through Western Europe, clogging roadways and disrupting public transport.
Temperatures dropped to as low as minus 18 degrees in some parts of Germany on Wednesday"
. . . .

Geothermal systems are very worthwhile in these sort of conditions, but we don't get these sort of sustained weather conditions in Australia, winter daytime temperatures are usually in double digits everywhere except the snowfields, so air-sourced heat-pumps are more suited here.


All this eartworks for burying of pipes for a Geothermal/Ground-Sourced heat-pump is expensive and unnecessary.

Geothermal :
Below ground, the temperature doesn't fluctuate much and it gets warmer the deeper you go. Typically, plastic pipes are buried underground either horizontally or vertically. A water/anti-freeze mixture is pumped through the pipes into which heat is absorbed from the ground heat. The warmed mixture goes through a heat-exchanger where it releases its heat into refrigerant, thereby cooling the mixture which is then recirculated back through the underground pipes.
The Geothermal heat-pump itself is typically about the same monetary cost as an air-sourced heat pump, but the extra lifecycle-costs of burying the pipes actually negates the slight increase in operating efficiency.


Installing an Air-Sourced heat-pump coupled with photovoltaics and/or windpower which collects energy all year round, will give you a better return on your investment

Air-Sourced hydronic heat-pumps offer the best overall compromise between efficiency/operating costs, and lifecycle-costs. Air-sourced heat-pumps are fully self-contained, and connected only to the hydronic pipework. They have large fans to force high volumes of air over large single-pass Fin Coil Evaporators containing the very cold refrigerant, to absorb ‘free’ heat energy directly from the ambient air.

Although a Geothermal system would seem to be more efficient, it will never save enough in lower operating costs, when compared to the lifecycle cost of an air-sourced system.

If you invest in grid-reversible photovoltaics and/or wind power, to the value of the geothermal groundworks, to offset running costs, you will have a system which costs far less to operate than the equivalent geothermal system.

We supply and install hydronic heating systems in most areas:

Warning: Never buy a heat-pump that has an electric element - check first!

We also supply components and complete kits for you or your installer

For more information please call 1300 552 976

or email

Geothermal extra costs:

The cost of installing the hydronics system and the heat-pump is roughly the same for Cold Climate Air Sourced (CCAS) or Geothermal, the main cost difference is in the cost of groundworks for geothermal - and those extra costs are considerable:

Recent cost estimates for these groundworks:
Depending on its thermal properties, a single-storey builiding may require from 60watts/sqm (solar passive design) to 120watts/sqm (standard construction) of heat energy to maintain a comfortable temperature in winter.
Taking an average of 80watts/sqm:
to work properly and efficiently, a Geothermal horizontal loop field requires pipe layed in a 2m deep trench, 1m long for every 1sqm of heated area in the building.

Building Area to be heated (sqm)

Heating energy required (kw)

Approx. Horiz 2metre deep trench length (lineal metre)

Approx. Horiz Loop costs ($AU)

Approx. Vertical loop cost ($AU)

Imagine how many solar electricity panels you could buy for this sort of money!





















Geothermal/CCAS Comparison

On a typical 200sqm house, our SX-20 running at -2C to +15C ambient air temp should cost about $6/day on average to run x 100days/year = $600/year (3000kwh/year)
Lets say a geothermal heat pump running at a constant 14C ground temp costs $3.50/day on average to run x 100days/year = $350/year (1600kwh/year)
Lets assume that a Geothermal system costs $25,000 more to buy and install than a Cold Climate Air Sourced heat pump system
at a saving of $250/year it will take 100years to get your $25,000 back in reduced running cost. (well beyond the lifespan of the heat pump)
Lets say you go the Skyline Energy SX-20, and put $8,000 into solar electricity, that will buy you about a 5kw grid reversible PV system generating 6000kwh/year, leaves you with a surplus of 3000kwh/year. Even with an excess feed-in tarif of only a miserable 8c/kWh, you should come out with $0 running cost. (NOTE: This 5kW PV system will not supply your general electricity costs but we are only comparing heating systems running costs - your geothermal will not save you on general household electricity running costs either)

But a Geothermal can do cooling too . . .

If you want cooling as well, the Geothermal system cost will increase to include the cold distribution system, the running costs will go up . . . better off buying a seperate "off-the-shelf" air conditioner with the money you saved, and increase your PV's to cover your general household electricity running costs and you'll still be ahead!!!

There is simply no justification for Geothermal

Click this link to find out more about our Solar Electricity Systems

Skyline Energy - Hot Water Recirculating Pumps