Currently, we only know what has been proposed, and we need to caveat our answers by pointing out that the actual legislation that may emerge from Congress may lead to a number of changes. However, based on the proposed plan unveiled in December 2009 and some other information that has emerged since then, here is what we do know. The HOME STAR Program (the formal name proposed for what is more commonly known as “Cash for Caulkers”) will be modeled somewhat after the “Cash for Clunkers” program that paid vehicle owners to trade in older, less-fuel efficient cars and trucks for new, more fuel-efficient vehicles