Conversion kit PROSAT PLUS 4 class for Viadrus U22 and U26 - 6 segments - Central heating - Polish, boilers for wood, coal, pellets, timber wastes, browncoal, solar collectors, water tanks, radiators - Kotly.com.pl
Sustainable Energy author Ireland (SEAI): Viadrus Hercules Eco
Reconstruction of Viadrus boiler with MultiBio burner