Hydronic Heating Victoria

Hydronic Heating Victoria

Specialising in SOLAR HYDRONICS via Heat Pumps

SKY ENERGY SYSTEMS www.skyenergysystems.com.au48

33% more efficient than other brands of heatpumps

After 15yrs of innovation, research and development, our latest ZA heatpumps are in a class of their own! Skyline Energy heatpumps are available from all leading hydronics specialists - INSIST ON THE BEST - don't let an inferior performing heatpump steal the heat from your system . . .

Skyline Energy Hydrocarbon Hydronic Heatpumps are far more efficient where it counts - at low ambient air temp and 40C returning water temp - lower running costs

We supply and install panel radiator systems and floor heating systems running from heatpumps.

Panel radiators and heatpumps ? YES! we have the experience AND the heatpumps!

We supply and install a complete range of air-sourced hydrocarbon hydronic heatpumps.

hydronic heating Air-Sourced Hydrocarbon-Charged Heat Pumps
Specifically designed for Hydronic Heating

  • Perfectly tuned for Hydronic Heating applications
  • 300-500% Efficiency through absorbed ambient Heat Energy
  • Running costs can be offset with Solar Electricity
  • Can be the back-up booster for wood-boiler instead of an element
  • Can replace a poor-performing solar-hybrid hydronics heater
  • Can replace a very expensive to run LPG hydronics boiler
  • Save tens of thousands of dollars compared to a Geothermal heatpump installation

Geothermal heatpump systems are only slightly more efficient, but offer a vastly reduced return on investment compared to our Air-Sourced hydrocarbon heatpumps. Combine air-sourced hydrocarbon heatpump with solar electricity for the ultimate in hydronic heating efficiency.

We also introduced inverter-style heatpumps but were disappointed with the results, they were not as efficient as our ZA hydrocarbon heatpumps, so we have discontinued development.

Hydronic Heating systems - Never be cold again

If you've ever experienced the luxury of a heated floor, or stepping from the shower into a warm towel, on a cold winters day, you'll know why Hydronic Heating systems are becoming very popular.

There are no drafts from forced air movement, you are just gently bathed in a warm environment. It's safe for all the family and great for people with allergies.

Water can be heated by GAS, LPG, Wood, Solar,   Ground-Sourced (Geothermal) Heat Pump, Water-Sourced, Air Sourced Heat Pump, or even a combination of one or more of these. For Australian conditions outside of natural GAS area's, we generally recommend Air Sourced Heat Pumps as they provide the greatest overall control, sustainability and cost efficiency compared to straight LPG, Wood, and electric systems.


hydronic heating  

We use the trusted name in non GAS hydronics throughout Australia, and despite what you may have heard can efficiently heat water hot enough for hydronic heating *radiators and towel rails! (Increase the radiator size to compensate for lower water temp)

Heat-pump running cost less than GAS and far less than Electric or LPG

Electricity AND GAS prices are constantly rising, and solar electricity costs continue to fall, so although installing an air-sourced electric heat-pump will cost more initially, there will be significant cost savings over time.

There are lots of factors that affect the COP of a heat-pump under the required conditions:

  • The design and innovation of the heatpump - they vary greatly!
  • The gas/refrigerant used
  • The ambient air temperature
  • The starting or returning water temperature
  • The water flow rate
  • Local voltage fluctuation
  • The input kW will also vary with the other variables

There is no such thing as "over-unity", energy in must equal energy out. The MAGIC is where the energy-in comes from and how efficiently it can be harnessed.

The Coefficient of Performance (COP) is simply a way of measuring the efficiency of something. It is the ratio of energy in vs energy out. A COP of 3 means 3x units of energy out for 1x unit in. In our case with air-to-water heat-pumps, the difference in the numbers is the energy harnessed from the air - at COP=3, 3kW of heat energy out comes from 1kW of electricity in, and 2kW of "solar" (heat) energy in, from the air.

All Skyline Energy Air Sourced Hydrocarbon Charged Hydronic Heatpumps are fine-tuned individually for MAXIMUM C.O.P. efficiency!

Skyline Energy Stainless Steel Buffertank

Skyline Energy Stainless Circulation Pumps

An essential part of any hydronic heating system

Rialto WiFi Hydronics Thermostat

Now you can manage your home hydronic heating system remotely from your smartphone and/or tablet



Skyline Energy Air Sourced Hydrocarbon Heat Pump

SX-06 for MAX 60sqm slab
  (or for 50sqm RADs)
SX-08 for MAX 80sqm slab
  (or for 65sqm RADs)

Skyline Energy Air Sourced Hydrocarbon Heat Pump
SX-10 for MAX 100sqm slab
  (or for 75sqm RADs)

Skyline Energy Air Sourced Hydrocarbon Heat Pump
SX-11CCZA for MAX 110sqm slab
  (or for 90sqm RADs)
SX-13CCZA for MAX 130sqm slab
  (or for 100sqm RADs)
SX-15CCZA for MAX 150sqm slab
  (or for 120sqm RADs)
SX-17CCZA for MAX 170sqm slab
  (or for 130sqm RADs)
SX-18ZA for MAX 180sqm slab ONLY
*not suitable for frost prone areas
SX-19ZA for MAX 190sqm slab ONLY
*not suitable for frost prone areas
Skyline Energy Air Sourced Hydrocarbon Heat Pump
SX-20BZA MAX 200sqm SLAB
  (or for 160sqm RADs)
SX-24ZA MAX 240sqm SLAB
  (or for 200sqm RADs)

Skyline Energy 20kW Air Sourced Hydrocarbon Heat Pump
V20ZA MAX 200sqm SLAB
  (or for 160sqm RADs)
V25ZA MAX 250sqm SLAB
  (or for 210sqm RADs)
V30ZA MAX 300sqm SLAB
  (or for 260sqm RADs)
V35ZA MAX 350sqm SLAB
  (or for 300sqm RADs)




Sanden Heat-pump Hydronics ?

Were you sold a Sanden heat-pump system for hydronics?

We have been contacted numerous times by customers who were ill-advised and were sold hydronics systems running from multiple Sanden Heat-pumps. (not by us) Unfortunately, most of these systems were undersized, (THE SANDEN DOES NOT PUT OUT 4.5kW IN LOW AMBIENT TEMPERATURES) working the Sandens far beyond their design capabilities, systems never working properly, and leading to premature failure of the heat-pumps.

Sanden heat-pumps are great for potable hot water, and if they had been sized correctly may have coped as hydronic heat-pumps even though that was never their intended application.

If you are such a customer, we can help you try correct the situation, and replace the Sandens with an adequately sized Skyline Energy hydronic heatpump. You may be able to re-use the tank and one of the heat-pumps for dedicated potable hot water, and recoup some of the original cost of the other heat-pumps.
For more information please >>contact us<<.

Changing from GAS/LPG to heatpump - for panel radiator systems ?

Heatpumps have lower water temperature than a gas boiler - but it still works!

The heat output of a panel radiator is based on the entering water temp, the room temperature, and the water flowrate or exiting water temperature.
Gas boilers can generally output water up to about 83C but to retain good efficiency we usually run our heatpumps to max of 55C. (the hotter we push the water the lower the efficiency)
Radiator manufacturers usually state the output of their radiators based on 80C entering temp, 60C exit temp, and 20C room temp.
At 55C/45C/20C for heatpump the panel radiator output would be roughly half.

Boilers modulate the gas flame, from max output to about 15% before turning off. They cycle on and off as required. When the house reaches the set temperature the system switches off until the temperature drops, then cycles back on usually at max flame before modulating.

What all this means is you can put a 30kW gas boiler on a 20kW heatload, it will quickly heat the water to its set temp (80C) then modulate, the water will be flowing through the rads at 80C and heat the house quickly up to temp, then cycle off.
(On most boilers you can program the water output temperature. If you can do this on yours, you could try turning it down to 55C and see how it performs)

Our heatpumps do not modulate but they do cycle on and off according to the house temp. If you change to a 55C heatpump it will take longer to heat the house because of the lower output of the panel radiators, but it will get there as long as the house does not lose heat faster than the panel radiators can heat it.
If the response from the heatpump is too slow, you could consider adding extra radiators where necessary.

Some heatpumps are advertised as hi-temperature heatpumps, but running them at 70C instead of 55C would drive down the efficiency to the extent that power usage would be far higher.

For more information please >>contact Skyline Energy<<.

   Skyline Energy SX-13CCZA Hydrocarbon Heatpump installation

ZA Hydrocarbon Heatpump - Simply a very efficient way to heat your home

  • Awesome performance and efficiency - Now with ZA serrated edge "Owl-wing" super-quiet, super-efficient, high airflow fans
  • Designed and supported locally by Skyline Energy
  • Hydrocarbon charged - typically 20% more efficient than standard refrigerant charge, and less wear & tear on the refrigeration system
  • No inefficient back-up element required
  • Copeland Scroll compressors
  • Automatic defrost
  • Easy installation
  • You can depend on our 15yrs+ experience
   Skyline Energy V35 Hydronic Heatpump Installation Tanjil South

Skyline Energy SX-13CCZA Hydrocarbon Hydronic Heatpump
Performance Chart - C.O.P. includes 300W primary circ pump:

C.O.P. of up to 5 at 10C ambient air temp - much higher than any other hydronic heatpump

Skyline Energy SX-13CCZA Hydronic Heat Pump

Panel radiators and heatpumps ? YES!

We have the experience AND the heatpumps!

  • We supply, and install hydrocarbon-charged heatpumps specifically manufactured for Hydronic Heating
  • We design and supply complete hydronic heating kits for plumbers to install
  • We can design, supply and arrange installation of hydronic heating in some areas
  • We installed our first air sourced heatpump in 2002
  • We installed our first hydronic heatpump system in 2005

Simplified rules for sizing your heatpump for . . . . . MAXIMUM EFFICIENCY AND SERVICE LIFE!

  • Calculate how many kW are required
  • Look at the climatology of the location to establish the duration of 0oC to +4oC. Donít just look at the extreme temps, look at the mean overnight temp and duration
  • If the ambient air temp rarely dips below +4oC or does so for short periods then you can use this simple calculation...
    3.3x electricity input kW = heatpump output (ZA hydrocarbon models) kW to size the heatpump.
  • If the mean overnight ambient air temp is between 0oC and +4oC change the calculation to 2.5 x electricity input kW = heatpump output (ZA hydrocarbon models) kW to size the heatpump.
  • A more powerful heatpump will raise the water temp more rapidly so it will cycle off before it needs to defrost, thereby maintaining a higher COP and efficiency.
  • If your building has very poor thermal efficiency (leaks heat energy) this will lead to longer running time increasing the likely need for defrosting which leads to higher running cost.
  • Skyline Energy Hydrocarbon heatpumps do not modulate output like gas boilers, so it is also important not to oversize which will cause short-cycling. Generally it is not necessary to increase the water storage capacity beyond 100Lt to 400Lt. (greater water storage can work against you in the shoulder periods where heating may not be required for more than a few days, as you need to reheat ALL the water in order to be able to use it)



Super Efficient Super Quiet Zeihl-Abegg Owlett Fan

Download datasheets for:

SX-06SX-08,  1x compressor 240v, single fan, side-discharge,
SX-11CCZASX-13CCZASX-15CCZASX-17CCZA  1x comp 240v dual fan, side discharge
SX-18ZA*SX-19ZA*(*not suitable for frost prone areas) 1x comp 240v dual fan, side discharge
(NOTE: V-Evaporator models are better suited for larger heatloads in frost prone areas)
SX-20BZASX-24ZA,  dual compressor 240v, 1ph or 2ph, dual fan, top discharge
V20ZAV25ZAV30ZAV35ZA,  V-EVAP, dual compressor 240v, 1ph or 2ph, dual fan, top discharge

bare heatpumps available from A$3,900 incl GST
(buffertank, circulating pumps etc. not included)

Trade Pricing & support also available

    SX-17CC hydronic heatpump installed with 200Lt buffertank     Skyline Energy V42 air sourced hydronic heatpump


Home Heating with Radiant Floor Heat vs Forced Air

Why is radiant floor heat better than forced air heat (ducted/aircon)?
It is more comfortable, more energy efficient, provides a healthier environment and is more aesthetically pleasing.

Radiant Heating is Comfortable Heating!
Comfort is hard to define and is best understood as the absence of discomfort. Perhaps the most remarkable thing about radiant floor heat is what you won't notice. There are no forced air registers to see. No noise or dust from mechanical blowers. No hot air blowing on you. No hot air collecting at the ceiling, wasting energy. No cold floors to chill your feet. The mild warmth of a radiant floor is a subtle experience and always feels just right

Radiant Floor Heat Saves Energy
It takes less energy to heat a home with radiant floor heating than a forced air system

Radiant Heat is Healthy Heat
Forced air systems not only blow hot air, they also push allergens, dust and other airborne particles around your home. Improved indoor air quality can reduce allergies, medical bills, incidences of asthma and more. European studies indicate that dust mite populations are reduced as much as 90% in radiant heated homes. A quiet, peaceful environment, devoid of noisy fans and blowers, is a healthier and more relaxing environment too.

A Message to builders and owner-builders in VIC:

Depending on your location, we may be able to offer you additional services including general plumbing and general electrical contracting for all of your home-building/renovating requirements.

We supply and install hydronic heating systems and heatpump hot water systems in many areas:

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

Hydronics and potable hot water (2-in-1 & 3-in-1) Heat Pump Systems

Hydronic Heating - Potable hot water heating - AND Refrigerated Air-Conditioning (Cooling) all from the same unit, sounds too good to be true . . . maybe it is!
Sizing a heat-pump to do hydronic heating AND potable hot water means increasing the size of the heat-pump to cater for both applications without compromising either one, and increasing the complexity of the system. We think its false economy, and recommend seperate potable hot water unit using either a Solar-Boosted GAS, or high efficiency heat pump
Electric back-up elements totally destroy the efficiency of a heat pump. To make-up for an undersized heat pump, AND to maintain the potable hot water temperature, some combined units can use up to 3x 3kW electric elements for heating!

hydronic heating

Efficient back-up for solar and/or wood/pellet-fired hydronic system:

hydronic wood boilerhydronic wood boiler

Heat Pump Solar or Wood Boiler back-up System

Instead of the traditional electric element backup, why not use a heat-pump that will provide the same (or more) energy but consume 60-70% less electricty!

How does this work

The solar and/or wood boiler system heats water in a storage tank which supplies the hydronic panels or floorcoils with hot water. When the sun/fire dies down and the water starts to cool, and if the hydronics needs more heat, the control system will fire-up the heat-pump to replace the heat from the solar/fire. Once the water in the tank reaches its optimum temperature, (with or without a rekindled fire) the heat-pump is automaticay switched off.

Best of both worlds

Sizing the heat Pump depends on whether you want just boosting, (a small heat pump like the SX-10) or a heat pump that gives you the flexibility to use either wood or dedicated heat pump whenever you want. We can help you which air-sourced heat pump booster is right for your requirements - Call 1300 552 976 or email:

Heat Pump Hydronic heating systems are:

  • Efficient (absorb solar energy)
  • Luxurious
  • Low maintenance
  • Safe
  • Affordable
Slab Heater

Energy Efficiency

Although heatpumps use electricity, and we've all been led to shudder at the talk of using more electricity, heatpumps are a very efficient use of electricity used to harness heat from the air - the most abundant energy resource we have!

Depending on your location, you can expect an average efficiency of about 300% (in colder climates) to over 400% (in warmer climates) from your air-sourced hydronic heatpump.

You can even offset some of the electricity needed, with Solar Electricty, and we can install your solar electricity system in conjunction with your heating system.

Heat Exchangers

If you want to use your heat-pump/boiler to heat your pool as well as your house, you will need an >external heat exchanger <
We offer a range of "shell and tube" heat-exchangers in two types, Titanium heat-exchangers and 316 Grade Stainless Steel heat-exchangers. (also suitable for a wide range of other commercial/industrial applications)

  heat exchangers

Solar Hot Water - Harnessing free energy from the sun - even in the dark!

The best just got better - > Sanden ECO "PLUS" < (NEW MODEL) Air Sourced Heat Pump

The solar hot water systems we're all used to seeing on the roof, are not always the best environmental solution!
The Sanden ECO "PLUS" heat pumps are whisper quiet & extremely efficient, using a small amount of energy to collect the abundant heat that the sun puts into the air we breathe, and may be the overall best system for your specific situation. Industry leading performance means higher rebates are available for our heat pumps.

  • New "PLUS" model is more efficient and now has 6yrs warranty on the heatpump
Article by Bruce Rowse (M.AIRAH)

According to a >case study< of a suburban Melbourne home, conducted by Bruce Rowse (M.AIRAH) and printed in the AIRAH Feb 2017 Journal,
a >Sanden ECO Heatpump hot water unit"uses one-fifth the energy of a gas hot water service" , , ,

"This is just 19% of the expected energy consumption of a 6 star gas hot water heater"

Ecolibrium is the official journal of the Australian Institute of Refrigeration Air Conditioning and Heating

Find out pricing and more about the NEW and improved Sanden ECO "PLUS" >HERE<

Why we don't recommend Solar Boosted Electric systems:

Victoria State Government homeowner guide to sustainability (PDF) page 4, table 1.1, supports our claim that heat-pumps can have a significantly lower lifecycle carbon footprint than solar-boosted electric systems:

  • avge heat pump produces 23 tonnes CO2 emissions
  • avge solar-boosted electric produces 33 tonnes CO2 emissions

Over $1,800 in STC & Victoria State Electric Changeover Solar rebates still available

Save your roofspace for Solar Electricity, and install a
> Sanden ECO PLUS <
heat-pump water heater on the ground - higher return on investment than electric solar hot water systems.

In other areas results may vary, but in almost all conditions, our heat-pumps
will outperform other heat-pumps and solar boosted electric systems.

Conventional Solar-Boosted Electric Hot Water systems actually rely on inefficient Electric-Element boosters - especially when you need it most IN WINTER!

The new and improved Sanden ECO "PLUS" heat pump will:
  • NOT put you at risk
  • ensure your water ALWAYS reaches and maintains safe temperature
  • kill or prevent harmful bacteria
  • save you money
  • innovative plumbing configuration provides hot water 50% faster than most other heatpumps
You don't have to worry about leaving the booster off - there isn't one.

Read more about the 'Solar Myth'

Our high efficiency, long life stainless steel heat-pumps are accredited for solar rebates, nothing on your roof, robust, more efficient, and simple to install.

If you currently have a GAS hot water service, *and have recently installed solar electrcity, upgrade to a Sanden and run it during the day from your solar electricity for the maximum return on investment! (*If you are not on a premium feed-in tarif)

More info

Solar Hot Water without roof panels

Eligible for all solar rebates*


Siddons Solarstream and other split-system heatpump replacements:

Skyline Energy SX-02 Hydrocarbon heatpump replacement for Siddons Solarstream 327-SS and 264-SS Hot Water units Skyline Energy SX-02 Hydrocarbon heatpump replacement for Siddons Solarstream 327-SS and 264-SS Hot Water units

  SX-02 and SX-03GT Hydrocarbon
  replacements for Siddons Heatpumps

The Siddons Solarstream 327-SS, 264-SS, and 417-SM heatpumps were amongst the most successful hot water units in Australia, and thousands have been sold. Siddons Solarstream stopped manufacturing them about 4 years ago.
The "Everlast" 316 stainless steel tanks they used are almost indestructable but some of those heatpumps are getting a bit tired now, so Skyline Energy will soon be offering new, "improved" replacements for those old heatpumps.

Soon to be introduced, our >SX-02< Hydrocarbon replacements, and >SX-03GT< Hydrocarbon units with more powerful compressors.
The performance difference offered by hydrocarbons over conventional refrigerants can be up to about 20%, AND reduces wear and tear on the components!

>We also supply and install Solar Electricity systems (with or without batteries) throughout Victoria<

Solar technology continues to leap forward with inteligent inverters that "learn" your power usage patterns and self adjust to maximise the benefits from battery systems, they even use your internet connection to access weather forecasts to predict solar yield and decide whether to charge from low-cost off-peak/time-of-use tarifs - its all about maximising solar self-consumption. We've have done the training and have the expertise to advise which system is right for you, and all you need to do is enjoy the results from the system.

RedbackRedback Inverter with Lithium Battery

Redback Hybrid Inverters, solar optimsers, and battery systems

We can offer you Redback "hybrid" single and 3ph Inverters (masterminded by Australian solar experts!) with
>Pylontech, LG Chem, and other Lithium Battery Technology<

Inteligent technology that gives you the power to store, monitor and manage your home’s solar energy all in a compact, elegantly design unit mounted either inside or outside your home. You can also upgrade your existing solar system !

With Solar Optimsers like Tigo and Solar Edge - add Micro-Inverter-Style benefits to standard/single-inverter system, to maximise the returns from your solar panels by allowing each panel to work independantly, harnessing and sending it's full potential output to the inverter.

With single/standard inverters, all of the panels outputs are reduced to match the lowest performing panel in the "string". Individual panel outputs do vary and degenerate with age, so if you have say 10 panels and one of them is "sick" or otherwise underperforming, it will cause the output of all the other panels to reduce to its level, and you may not even be aware of it. Even with monitoring, you can only tell what the entire system is producing.

For more information please call 1300 552 976

or email

Pylontech Lithium Solar battery   redback technologies logo   Tigo solar optimiser   henrad   emmetti gerpex   Giacomini   Copeland Scroll HYChill   zeihl-abegg owl fan   zeihl-abegg owl fan

21st Century Heating Solutions