If you are considering installing heating / air conditioning in Arizona, then you should know about the great federal, state, and local rebates and subsidies that are available right now. For example, the Arizona Public Service (or APS) offers rebates which enable you to recover between 30% and 50% of your cost. Besides these APS rebates, you can also qualify for a 30% tax credit with the American Recovery and Reinvestment Act of 2009.