Home heat pumps always have an exterior unit here. It's heat pump water heaters that don't [0]. [0] https://www.rheem.com/products/residential/water-heating/hy

Home heat pumps always have an exterior unit here. It's heat pump water heaters that don't [0]. [0] https://www.rheem.com/products/residential/water-heating/hybrid/ https://www.rheem.com/products/residential/water-heating/hyb...