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 election in which voters are required to identify a party preference before the election and are not allowed to split their ticket is called (A) an open primary (B) a blanket primary (C) a closed primary (D) a runoff primary (E) a presidential preference primary.