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.
Primary elections are held to determine a political partyâs candidate for a general election. In the United States, primaries generally fall into three categories: open, closed and semi-closed.n both Alaska and Utah, for instance, the Democratic parties held open primaries in 2012, while their Republican counterparts limited primary participation to members of their own party.