Dear Hans: the most suitable ...

Dear Hans: the most suitable ww treatment should ve redituable. Also, simple to use, low cost, compact, longlife, efficient and with 2 highlighted points: fullfill your law requirements and portable. I can design it to you as  ww expert (more than 25 yrs of field experience in industry at PhD level. 

As one colleague said, I will need some basic data to suit the better solution to you. Is similar to a consult with a specialized phisician: you have to explain thw nature of your health situation and he/she will prescribe some laboratory essays or some image diagnosis. Depending upon the values or the interpretation of images, he/she will fit a treatment to you. We do more or less the same. The design of ww system will depwnd upon your local conditons. If you are interested, please write me back to: hydroengs@gmail.com  attn. to Dr. Eng. Carlos Rivera Pomés.