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.
A primary is a state-level election where party members vote to choose a candidate affiliated with their political party. Party candidates selected in a primary then run against each other in a general election. Thirty-four U.S. states conduct primary elections. There are several types of primaries in the U.S. system. Closed primary: Participation is open only to a particular political partyâs registered members.