One of my pet peeves is seeing heat sources inside of the house when I'm running the AC. The three that get most of my ire are the laundry room, the dishwasher, and my over stove microwave/vent (that just filters the air and returns it to the room). I realize that I could re-route the microwave/vent to the outside and add blower/vents to the small second story laundry room and behind the dishwasher to minimize my ire, however I always wonder if by doing this my total energy costs might rise because I will essentially be knocking three holes into exterior walls and replacing R-19 insulation with a flapper door whose R value is probably .000000000001, and will allow the cold to enter all winter 24/7.
Is there a solution to my dilemma?