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System models are made by us in Calvent and Calvent Plus programs (Lindab). The Calvent program is one of the best program in the market to support projecting. More you can find:
http://www.cadvent.pl/
Plumbing calculation of the heating system and col, hot water and circulation we make in Instaltherm HCR and Instal-san (Instalsoft)

 
 
 
 
 
 
 
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