How much does a new HVAC system cost?
A new central AC or furnace installed typically runs $4,000 to $9,000 each, while a heat pump system that handles both usually lands between $5,500 and $14,000. Price depends on the size of your home, the efficiency rating you choose, and whether your ductwork needs work.
How long does an HVAC system last?
A well-maintained furnace lasts about 15 to 20 years and a central AC or heat pump around 12 to 15 years. If your system is in that range and needing frequent repairs, it's usually smarter to put the money toward a more efficient replacement.
Should I repair or replace my AC?
Repair if the unit is under about 10 years old and the fix is minor. Lean toward replacement if it's older, uses the old R-22 refrigerant, or the repair would cost more than about a third of a new system. A useful rule: multiply the unit's age by the repair cost — if the result tops $5,000, replace it.
How often should I service my HVAC system?
Once a year at minimum — ideally the AC in spring and the heating side in fall. A tune-up catches small problems before they become breakdowns, keeps efficiency (and your bills) in check, and is often required to keep the manufacturer's warranty valid.
Why is my AC running but not cooling?
Common causes include a dirty air filter, a frozen evaporator coil, low refrigerant from a leak, or a failing capacitor. Start by replacing the filter and making sure vents are open. If that doesn't help, it needs a technician — running a system low on refrigerant can cause expensive damage.
Is a heat pump worth it?
For many homes, yes. A heat pump handles both heating and cooling from one efficient electric system and can noticeably cut energy bills, especially in mild and moderate climates. In very cold regions it's often paired with a backup heat source. Federal and utility incentives can offset a chunk of the cost.
How much does a tune-up cost?
A seasonal HVAC tune-up usually costs $100 to $300. Many contractors offer maintenance plans that bundle spring and fall visits at a discount and give you priority scheduling during peak season, which is worth it if your system is more than a few years old.
What size HVAC system do I need?
That depends on your home's square footage, insulation, windows, and climate — not just a rule of thumb. A reputable contractor runs a Manual J load calculation to size it correctly. Avoid anyone who quotes a size by glancing at your old unit; wrong sizing is the top cause of comfort and reliability complaints.
› Read the full Heating & Cooling guide