The 38MHRBQ heat pump lives up to our Comfort™ 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.