Just the right fit: Insulation loses its effectiveness if not installed correctly. This includes being installed too loosely, squeezing batts in too tightly, or not blowing in loose-fill to the correct depth.
Out with the old, in with the new
Your refrigerator uses the most energy of any appliance in your home if you consider that it runs 24 hours, seven days a week. According to ACEEE, there are 126 million refrigerators and 38 million freezers using 200 billion kWh a year.