A new law has been approved by the department of energy.
As of May 1, 2013 80% furnaces will no longer be sold or installed. The new law is 95% and above. I am under the understanding that ACCA tried to fight this and wrote a letter stating that this is not right and all applications will be right for installation of 95% furnaces like attic, crawlspaces, etc.
This will force everyone to have to purchase a High Efficient furnace which could double the cost of just a standard furnace.
In January 1, 2015 The new law is requiring 14 Seer and above on all A/C Units. Meaning all A/C installs will go up.