Solar Venti

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SolarVenti's patented solar panels draw in fresh air through hundreds of small holes distributed over the whole of the rear plate. And they do it immediately - every single time the sun shines.

The special air circulation system in the panel provides optimal insulation against heat loss.

The fresh air injected by the system dehumidifies, ventilates and provides the home with additional heat.

If the system is switched off on hot days, the SV regulator unit can automatically send the 12 V from the solar cell to a well-placed, extra ventilator which then cools the home.

And if SolarVenti’s earth-cooling accessories are added to this cooling system, the user will achieve dehumidification, ventilation and an additional source of heat coupled with an effective air-conditioning system which runs with no operating costs.

Between 2002 and 2007 we gained 20,000 new, satisfied users of our tried and tested, patented product from all over the world. Our SV solar air collectors remain on the wall or roof year after year - after year. And there are no operating or maintenance costs.

To understand how a Solarventi works, let us give you some background insight.

“Noting the heat source is the sun sending heat via a solarventi into your house being the (heat sink) absorber.”

Energy is the driving force for the universe. Energy is a quantitative property of a system which may be kinetic, potential, or other in form. One form of energy can be transferred to another form. Heat is the thermal energy transported from one system to another because of a temperature difference. The transfer of that energy stops when the temperature balances out in the entire environment. The laws of thermodynamics govern how and why energy is transferred.

Second law of thermodynamics simply stated –  heat always flows naturally from an object at a higher temperature to an object at a lower temperature, and heat doesn’t flow in the opposite direction of its own accord.

The law is certainly borne out in everyday observation — when was the last time you noticed an object getting colder than its surroundings unless another object was doing some kind of work? You can force heat to flow away from an object when it would naturally flow into it if you do some work — as with refrigerators or air conditioners — but heat doesn’t go in that direction by itself.

A reversible process , is a process that can be reversed through tiny changes, without a dissipation of energy, i.e. the heat sink (walls, floors, structure) release the heat back into the air overnight or on cloudy days.


Heat flow can be a transient or a steady process. In the transient state, temperature and/or heat flow vary with time. Steady-state heat flow occurs when the temperature and heat flow reach a stable equilibrium condition that does not vary with time.

Heat flow can occur in one, two, or three dimensions. In almost all real situations, heat flow occurs in three dimensions acting alone or in some combination:

?    conduction   - convection – and  radiation.

Changes in moisture state, although not strictly an energy transfer mechanism, must also be considered since these state changes absorb and release heat energy, i.e., latent heat. 

Conduction is the flow of heat through a material by direct molecular contact. This contact occurs within a material or through two materials in contact. It is the most important heat transport mode for solids.

Convection is the transfer of heat by the movement or flow of molecules (liquid or gas) with a change in their heat content.

Radiation is the transfer of heat by electromagnetic waves through a gas or vacuum. Heat transfer by this mode therefore requires a line of sight connection between the surfaces involved.  All objects above absolute zero radiate heat energy; it is the net radiative heat transfer that is the heat of interest. Radiation is mostly of importance for heat transfer between solids, but radiation between high-temperature gases is occasionally of practical importance. 

State change, sometimes called phase change, occurs at a constant temperature but still entails the movement of energy. For example, evaporation absorbs energy and condensation releases energy. This energy is sometimes called latent heat.

The mode of heat transfer often changes during the process of heat flow through and within building systems. For example, the sun transmits heat by radiation to the earth, where it can be absorbed, for example, by a black filter mat (Solarventi). The heat is then transferred by conduction through the filter mat and transferred to the indoor space by convection (Fan) and to the indoor surfaces.

Thermal comfort is the condition of mind that expresses satisfaction with the thermal environment and is assessed by subjective evaluation.

Thermal comfort is maintained when the heat generated by human metabolism is allowed to dissipate, thus maintaining thermal equilibrium with the surroundings. It has been long recognized that the sensation of feeling hot or cold is not just dependent on air temperature alone.

The recommended temperature range to optimize indoor thermal comfort for most people is 19°C to 28°C*.

  • air temperature
  • radiant temperature (ie. the temperature of the walls, floor, windows etc.)
  • the amount of physical activity
  • the amount and type of clothing worn.

Humidity- A house and its structure being a moisture sink in respect that if the humidity in the air goes up, then the house will absorb that extra water from the air. On continual basis, this will lead to the point of whole house/room  saturation whereby condensation  results in of the excess moisture.