These devices are very good, efficient and effective, however, require an optimal Control, to have performance similar to the theoretical and to have the opportunity to draw in a few years, and then actually work for free.
Hawa vifaa ni nzuri sana, ufanisi, hata hivyo, zinahitaji mojawapo Kudhibiti, kuwa na utendaji sawa na nadharia na kuwa na fursa ya kusogea katika miaka michache, na kisha kweli kazi kwa bure .