Heating systems, deaerators: Capacity and efficiency, various water flows (NT VVS 090) Posted onMay 21, 1991September 21, 2020Author Report #: NT VVS 090 Approved: May 1991 Download pdf Size: 56.92 KB Abstract This NORDTEST method describes tests of maximum deaeration capacity and deaeration efficiency at various water flows for deaerators. Categories and tags