A heat pump is a cooling system that can be reversed to produce warm air. While many heat pumps for the home are two part systems RV heat pumps are typically a single, self-contained unit. Essentially a heat pump is a device that moves warm air from one place to another. A heat pump/AC unit will extract heat from the indoor air and move it outside to cool the space or it can be reversed to extract warm air from outdoors and transfer it indoors to keep the interior warm when it’s chilly. Not all air conditioners for RVs have heat pump capabilities.\r