Конверсия нефти в газ - 5-зонный настенный котел Combi Navien NFC-200

Need more than 3 zones on the NFC? Use the first 2 on-board and add a switching relay on the 3rd TT to your relay. This is our 2nd NFC boiler. Amazing units. Only complaint: primary loop is 1 1/2” and the NaviClean is 1” compression or 1 1/4” NPT. What were they thinking? The primary loop is basically 3/4” stainless steel!!

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