The Ideal-Air Dehumidifiers are now rated at AHAM standards (80°F, 60% Relative Humidity). There is no change to the unit itself, only to the temperature and humidity at which the reading is being taken from. Previously they were rated at a higher temperature and humidity level based on hydroponic industry standard usage (86°F, 80% Relative Humidity). They will now be rated at AHAM standards based on the recent US Department of Energy ruling.