Potential homebuyers judge the value of a house by how convenient and comfortable it is, and whether they must spend money after purchase on repairs, upgrades, or electrical appliances. Homebuyers want to know how efficiently and economically a house can meet its heating and cooling needs. A new HVAC system can increase home value by about 10%. Like a newly renovated bathroom, an HVAC system doesn’t bring a higher return on investment. However, a potential home buyer is usually deterred by a malfunctioning or old HVAC system. A non-working appliance reduces a house’s value. It’s important to determine if your existing HVAC system needs to be replaced or repaired if you plan to sell your home soon. A home appraiser will assess the integrity of the walls and the load-bearing beams if you modify your HVAC system and install new ductwork or pipes. Your HVAC system should be replaced before you sell your house if it is older than 20 years or the cost of repairing it is greater than the price of a new one. Repairing some parts of your HVAC system may be a better option than replacing it entirely. To calculate the cost of repairing your existing HVAC unit, multiply its age by the approximate repair cost. Replace your unit if the number exceeds $5,000. It may still be necessary to replace the ductwork if your unit is over 15 years old. The lifespan of ductwork is 20-25 years. However, they deteriorate after 15 years and reduce your HVAC system’s efficiency. It might be necessary to tear out walls and ceilings to replace ductwork in some houses. Carefully consider your options. It may be possible to increase your home’s resale value by repairing or upgrading certain HVAC system components.