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Solar Hot Water

Solar energy reaching earth is so vast that in one year it will provide more than twice as much energy as will ever be obtained from all of the earths non renewable resources. That's a massive 3,850,000 exajoules per year.

But can it heat 300 litres of water each day for you and your family?

The answer is yes, but the system has to be the right system for your geographical location, and your needs. Here at SmartHeat we develop and design a range of solar systems for households, commercial applications and large public swimming pools, so we know what we are doing.

The good news for Australians is that we have one of the best climates for evacuated tubes, the most effective system for this region. At SmartHeat we have brought together industry leaders in the manufacturing of solar systems to provide your family with the best. SmartHeat analyzes your geographical location and consumption patterns to size the right system for you.

Call Smartheat, or send us an email for an obligation free assessment of your needs.You too could be enjoying the benefits of plentiful hot water and reduced electricity bills by switching to the enormous potential of the Sun.

SmartHeat and you, a partnership in energy efficiency.

Two projects from SmartHeat are included in the Mosman Design Awards:
1A David Street - Solar pool and hydronic heating
11 Burton St - Solar pool and hydronic heating


 Just click here to email a SmartHeat representative and feel free to ask any question you like about Solar Hot Water, and what it can mean for you.

Domestic Hot Water

Solar Hot Water

Smartheat's solar range and design ensures that the system installed is the system that works best for you.

The efficient evacuated tube technology has given householders the opportunity to realise the real benefit that solar can offer by reducing the hot water heating costs while contributing to a carbon free enviroment.

At SmartHeat we are more than happy to work through the options when considering a hot water systems and we will design a system for all budgets.

Depending on your location, and the number of people in your house, there is a system to suit your particular requirements. Cutting over to solar means your bills reduce every month and proofs your home from rising energy costs.

With great warranties 15 years for manifold and tubes.

You are probably eligible for Federal Rebates, and can recieve Renewable Energy Certificates, the number of which depends on what size system you purchase.

At SmartHeat we will design a solar hot water system that incorporates the very best product options available.




Heat Pumps

 A Heat Pump can deliver domestic hot water at a fraction of the cost of normal hot water systems. That is why the federal Government considers them a viable alternative to the old resistive [electric] systems.

Your daily hot water needs can be met for as little as 500 watts an hour, which can be as low as four cents an hour at off peak depending on your provider.

How the Heat pump works.The inflow latent energy from the air runs over the systems evaporator where the refrigerant gasses absorb the heat and it rapidly expands. The refrigerant is then drawn into the compressor which increase the pressure and the temperature. It is then transported to a condenser which runs the refrigerant around the outside of the water storage tank heating the water in the tank.

The refrigerant then reverts to a fluid and begins the cycle again.

Heat Pumps are used to supply hot water to large hotels and clubs throughout Australia.

A Heat Pump can deliver your family hot water even in the coldest of climates.Having a active defrost function to help  the system operate when does get very cold. They are truly an advanced piece of technology.

There are still rebates available. Where you can take advantage of them by incorporating a Heat Pump into the mix which would remove the high cost of running a traditional hot water system.

Contact us to discuss the options available from our wide range of Heat Pumps


Instantaneous Gas

SmartHeat offer a range of the best continuous flow gas systems on the market today.

The Bosch systems we use are the most efficient and advanced when it comes to technology, the systems utilises the waste heat produced by the primary burner and in the recovery process heats the water entering the system. This in turn reduces the amount of gas required to heat the water resulting in an increase in the efficiency and a reduction of the gas burnt.

Again the benefits are in the savings made.

Also an ideal back up program if you are considering a solar system for those inclement days.

At SmartHeat we can size supply and install an instantaneous system to suite your family requirements.


 All-glass vacuum tube solar collector

The all-glass vacuum tube is made of two concentrically placed glass tubes. The space between the tubes is under vacuum. The outer surface of the inner glass tube is coated with a heat-absorbing substance. The heated fluid is contained inside the inner glass tube. In this way the fluid can be heated relatively efficiently and because of the vacuum insulation, the absorbed heat losses will be quite low.


The Advantages:

 1. Easy to manufacture, relatively economical.
2. Better efficiency than flat panel, no matter winter or summer.
3. It can withstand mains water supply pressure. It can be pressurised for use in close-loop systems.
4. A larger surface area.

 The variations of all-glass tube type

3genThis type of solar collector is a varient of the all glass vacuum tube collector. It still uses evacuated twin-wall glass tubes to absorb solar energy, but instead of containing the fluid inside the inner glass tube directly, it contains the heated fluid inside a U-shaped metal tube placed inside this twin-walled glass tube. A metal foil installed inside the glass tube, and in thermal contact with both the metal U-tube and the inner wall of the glass tube conducts heat from the glass wall to the fluid inside the U-shape metal tube.

The Advantages:

1. Easy to manufacture, relatively economical.
2. Better efficiency than flat panel, no matter winter or summer.
3. It can withstand mains water supply pressure. It can be pressurised for use in close-loop systems.
4. A larger surface area.

The Disadvantages:

1. Same as the flat panel collector, it is not very easy to install because of its bulkand weight. More than one person is usually required to install it.
2. Since connecting the multitude of U-tubes involves much welding joints inside the collector header, it is very time consuming to identify, let alone to repair any leakage. So some times the only viable option is discarding the entire section, should this collector develop even a small leakage.
3. Since the U-shape tubes inner diameter is quite small, they are very prone to deposit build-ups when used with hard and heavily mineralised water. This can seriously affect the collectors life span.
4. Relatively high thermal inertia, making for slow thermal response and poor efficiency under conditions of intermittently available solar input.
5. When used in large arrays, as in Commercial and Industrial installations, the entire array will drop out of service with even a single small leakage anywhere in the array. The entire arrays, consisting of many U-tube type collectors, must be completely shut down for repairs and maintenance.
6. While this collector type quite effectively relies on a twin-wall evacuated slip-on glass tube for reducing its heat loss, all its metal heat-handling parts are still located in the atmosphere inside this slip-on glass tube. Consequently, these vital parts are subject to continuous heat degradation and oxidization even under normal operating conditions, and more so during the periods of stagnation (i.e. during periods of water flow interruptions through the collector)


The SmartHeat solar collector heat technology.

The evacuated tube assembly consists of a heat pipe, an absorber plate, a glass tube, a metal sealing cover, a condenser and a getter as its main components. The glass tube is made of highly translucent high impact strength 2.5 mm thick borosilicate glass. High strength glass and high vacuum protect the tube internal parts from harmful environmental factors and from corrosion to ensure long service life and consistent long-term performance of the solar collectors. Our glass tube can withstand the impact of 35mm diameter hail without damage. Heat pipe is made of copper and is attached to the solar absorber. It works as a highly efficient heat transfer element, consisting of an evaporator section and condenser section. The evaporator section is tightly bonded to the absorber. High purity Aluminium is used as the absorber plate.

High purity Aluminium is chosen as the absorber material due to its low specific heat and high heat conductivity, both of which are important factors in achieving superior performance and fast thermal response of the collector. To achieve the highest heat absorption efficiency, the sky-facing side of the absorber is magnetron sputtered with aluminium nitride oxygen selective coating with absorption coefficient above 92%, and with the emission coefficient less than 8%. The technology used in the process of applying this absorber coating is very environmentally friendly and features low energy usage in comparison with the process of applying black-chrome or black-nickel coatings, which are usually applied by electroplating.

The glass tube is made of high-impact borosilicate glass with high IR light transmittance of over 94%. In order to reduce convection heat losses to an absolute minimum, the glass tube is evacuated to 0.001 Pa, or one hundred million times less than the standard atmospheric pressure. Long term stability of the vacuum is ensured by carefully designed getters. Sealing between the glass tube and the metal flange at the top of the vacuum tube is achieved by directly welding the metal flange to the glass tube.

The vacuum tube collector advantages:

1. The vacuum tubes are frost resistant.
2. Have the ability to withstand high fluid pressure.
3. Have highest efficiency in all climatic conditions, any time of the year
4. Due to "Dry Heat Interface" and large manifold cross-section area, high mineral and calcium content in water does not represent a problem.
5. Low collector fluid pressure drop of only 25kPa at 300 litres per hour flow rate
6. "Dry Heat Interface"  allows extremely easy installation and servicing. In case of a vacuum tube failure or breakage, the system remains fully operational during repair. Replacing a faulty tube is as easy as replacing a light globe, a great advantage not available with other types of solar collector. It is thus the type of Solar Collector particularly suitable for use in large arrays.
7. A SmarHeat collector has very low overall thermal inertia. It will increase its fluid temperature rapidly. It can convert to useful heat even very short periods of sunshine.
8. Despite its numerous advantages, it is totally competitive with other types of solar collectors for its year-round energy yield.
9. Vacuum tubes can be independently rotated for optimum solar incidence angle. This is important when the installation platform (roof) is not facing exactly South (in the northern hemispheres), or exactly North (in the southern hemisphere). Most other collector types do not offer this feature.

Product Comparison

product comparison 01

product comparison 03


The picture below shows the most common layout of a Smartheat hot water system usually use a forced circulation. The system consists of a vacuum tube collector, storage tank, circulating pump, electronic control unit, heat exchanger and other auxiliary items. Solar collector absorbs solar irradiation which it converts to heat. The heat transfer fluid within the manifold absorbs this heat and transfers it, via a heat exchanger, to the water in a water storage tank. An electronic control unit monitors temperatures (T1) of the collector manifold fluid, and (T2) of the storage tank water. These two temperature readings are used to manage the fluid flow by switching the circulation pump. This is only one of the many possible configurations. Please consult our Project Engineer for your particular requirement.

Click here to see more about Solar Energy (PDF)