SolarVenti Ltd. has 27 years of experience in the development, production and professional servicing of solar air collectors.
Today, we are market leaders, with almost 60,000 SolarVenti systems operating with satisfied customers in large parts of the world. SolarVenti’s solar air collectors are all using our own patent. This gives SolarVenti models numerous advantages in terms of performance, reliability and maintenance…
About the patent and construction
SolarVenti’s patented technology is – simply explained – a particular intake of fresh air to the panel through many hundreds of small holes on the backside of the panel. The intake is important for the construction overall.
The particular intake is, among other things, important for the high efficiency and the operational security of the systems.
The very large filter, which is stretched out across the whole inside of the particular intake back panel of the SolarVenti means that the systems are always kept clean and maintenance-free, also in the long term. The felt stopps particles larger than 0.08 mm (80 Micron). When the fan is off – in sunshine, the temperature in the felt exceeds 75 degrees C. Germs and other particles are dried out and expelled.
100% silent self cooling
Cooling/self-cooling through a panel with an extra ventilator on competing products furthermore does not allow the user to be rid of the sound of the ventilator on very hot days.
Here, the extra cooling ventilator on the inside of the panel makes it impossible to set the system to ‘silent off’.
At the same time, the cooling ventilator inside the panel uses the power from the solar cell, which instead could have been better used to cool the house with a separate ventilator, mounted on the shadow side of the building..
Small panel – big performance
The position of the solar cell inside the panel means that – combined with an optimized internal air flow and a specifically developed and tuned SV regulator unit – SolarVenti systems have a particularly high output per visible surface area on the solar collector panel.In other words: smaller solar air collector panel with a bigger effect.
Lowest possible panel thickness
Air intake through many small holes on the whole surface of the back panel creates a particular ’cushion’ which allows SolarVenti to avoid isolation of the back plate on the panel.
And thus – without loss of performance – has decreased the total thickness of the panel down to 5.5 centimeters for the models SV3, SV7, SV14 and SV20.
100% operational security
With the 100% secure self-cooling of the SolarVenti system, the solar cell andventilator can never be damaged from extraordinarily high panel temperatures.
The self-cooling will always function, independent of a power supply.
Contrary to competing systems with an extra cooling ventilator – which can break and cause heat damage to the solar cell and ventilator – it would seem useful and simple to let an extra ventilator cool the inside of the solar collector, and at the same time let it draw warm air out of the house and through the panel when sun and summer is at their warmest.
But that is not a good idea. Sending ’used air’ out from the inside through a solar air collector panel will in the short or long run cause deposits inside the panel, which will then need to be removed, dismantled and cleaned.
The filter in a SolarVenti is huge and takes up the whole surface of the back panel. It is maintenance-free and will under normal circumstances never get blocked. This is what increases air quality.
This means that the user will avoid problems of non-cooling of the solar cell and ventilator inside the panel, caused by a blocked filter, which then causes a weakened flow and performance of the panel.
Maximal use of heat from wall to roof
Since the SolarVenti ’breathes’ into the filter through the many hundreds of holes distributed across the aluminum back plate of the panel, the intake has no ‘vacuum effect’. The air is drawn in passively through a large surface towards the small holes, therefore only draws minimal dust into the rear of the filter mat. This dust being organic and will dissipate with heat. The air stream drawn towards the many intake holes in the panel further means that heat from surrounding wall and roof surfaces are drawn in to a large extent and are used inside the solar air heater.
An SV Regulator Unit optimized for solar cells
SolarVenti’s in-house developed SV Regulator unit improves the performance of the solar cell further by approx. 15-20% because the Solarventi regulator is specifically developed for 12V solar cell operation. This increases the solar air heaters heat and energy efficiency. The Solarventi regulator controls on/off, air speed and desired temperature.
The small computer of the regulator will in respect to the energy of the actual installation, continually maintain an optimal work tension inside the power producing solar cell within the air collector. This electronic regulating of the solar cell control causes a marked improvement of the ventilators’ performance. In turn improving the total performance of the solar air drying and heating system.
Durability, Distributors and Service
SolarVenti has experience with almost 60,000 systems in the field. We have units in extreme snow and cold countries as far north as Greenland and Lapland. We also have units in Southern Europe and Australia – New Zealand with the toughest solar conditions.
Our solar air collector systems hold up. And we know that they hold up for a long time. Most systems produced and mounted back in 1986 are still running without problems, maintaining ventilation, heating and a high indoor air quality.
Our well-extended net of distributors ensures that SolarVenti owners always have access to qualified help, installation advice and service.
Measurements and performance numbers
Measurements and performance numbers for solar air collectors can be used and abused to manipulate the reader. See more under: Facts and Hot Air
SolarVenti performance has also been independently measured by the DELTA Centre of Test Excellence, one of four sub centers under DANETV (Danish Centre for Verification of Climate and Environmental Technologies). Here the Solarventi SV7 is compared to two similar models from competing Companies.