Florida's wildly popular Cash for Clunker Appliances program soon will be reborn with a new twist: Rebates for clunker air conditioning systems. State officials have approved a program that will give Floridians a flat fee rebate – yet to be determined -- for new Energy Star-rated central air conditioning and air source heat pumps systems purchased before the end of the year, said Brenda Buchan, the chief analyst with the Governor's Energy Office who managed the Energy Star appliance rebate program. Window or room air conditioning units will not be included. Buchan said Florida also is considering covering Energy Star...