Installing a heat pump typically requires expertise, although homeowners may be able to replace a unit, especially if it's similar to the unit being replaced. Heat pumps need specialized electrical connections and proper drainage in addition to vents and ductwork.
Heat pumps function similarly to air conditioners, and they generally require similar expertise to install. While it may be possible to replace an air conditioner or older heat pump if the ductwork and vents are appropriate, the cost of installation is typically fairly low. Experts also know how to take steps to ensure the system functions properly and efficiently. Small mistakes can lead to higher heating and cooling bills, so the cost of hiring an expert can lead to a lower operating cost over time.