The 38MHRBQ heat pump lives up to our ComfortTM series name, quickly getting up to speed to provide responsive heating and cooling. The highest efficiency model in this series, it’s the ideal solution for affordable, space-saving comfort. Properly matched with a Carrier high wall indoor unit, the 38MHRBQ can make all the difference in a room addition, converted space, or anywhere your ducted system leaves you less than comfortable.