90% Furnace venting. Posted on August 22, 2012 by Andy. With these higher efficiency furnaces, came some other considerations. The 90% implies that 90% of the heat that is put into the furnace is transferred into the duct system and subsequently into the homes living space leaving only 10% going out the exhaust.
The definition of a direct primary election is when people vote for candidates of their political party by direct vote instead of by delegates at a convention.
Victory in a primary usually results in a candidate being nominated or endorsed by a political party for the general election. A general election is an election held to choose among candidates nominated in a primary (or by convention, caucus or petition) for federal, state and/or local office.