Heating, cooling and water
| System | Typical life | Notes |
|---|---|---|
| Central air conditioner | 12–15 yrs | Shorter in hot, coastal or dusty climates. |
| Heat pump | 10–15 yrs | Runs year-round, so it often wears faster than an AC-only unit. |
| Gas furnace | 15–20 yrs | Annual service and clean filters matter most. |
| Tank water heater | 8–12 yrs | Hard water and skipped flushing shorten it. |
| Tankless water heater | 15–20 yrs | Needs periodic descaling in hard-water areas. |
| Water softener | 10–15 yrs | |
| Sump pump | 7–10 yrs | Test it every spring. |
Roof and exterior
| System | Typical life | Notes |
|---|---|---|
| Asphalt shingle roof | 20–30 yrs | Architectural shingles toward the high end. |
| Metal roof | 40–70 yrs | |
| Clay or concrete tile roof | 50+ yrs | The underlayment beneath often needs replacing sooner, around 20–30 years. |
| Exterior paint | 5–10 yrs | Sun-facing walls go first. |
| Vinyl windows | 20–40 yrs | |
| Garage door opener | 10–15 yrs |
Appliances
| Appliance | Typical life | Notes |
|---|---|---|
| Refrigerator | 10–15 yrs | Clean the condenser coils yearly. |
| Range or oven | 13–15 yrs | Gas ranges often outlast electric. |
| Dishwasher | 9–12 yrs | |
| Clothes washer | 10–14 yrs | Replace rubber supply hoses every five years or so. |
| Clothes dryer | 10–13 yrs | Clean the full vent duct yearly. |
| Garbage disposal | 10–12 yrs |
Pool, electrical and safety
| System | Typical life | Notes |
|---|---|---|
| Pool pump | 8–12 yrs | Variable-speed pumps run cooler and often last longer. |
| Pool heater | 7–10 yrs | Water chemistry affects heat exchangers. |
| Electrical panel | 25–40 yrs | Some older panel brands are worth having an electrician look at regardless of age. |
| Smoke alarms | 10 yrs | Replace the whole unit at 10 years (NFPA guidance). |
| Carbon monoxide alarms | 5–10 yrs | Check the replace-by date on the back. |
How to find out how old your equipment is
- The data plate. Most HVAC units, water heaters and pool equipment have a label with the model and serial number. Many manufacturers encode the manufacture date in the serial number; the manufacturer or an installer can decode it.
- Permits. Replacing an HVAC system, water heater or roof often needs a permit. Your city or county's permit records can show when the work was done.
- Paperwork from the purchase. Your home inspection report usually lists approximate ages of major systems.
- Past invoices and warranty cards. If you can find them.
Planning for replacement
Once a system is past the middle of its typical range, start setting money aside and get a quote before it fails, not during a heat wave. Replacing a water heater on a Tuesday afternoon costs less, and gives you more choices, than replacing it after it floods the garage. For anything still under warranty, keep the paperwork where you can find it: a failed part under warranty is a much smaller bill.
Common questions
Should I replace an HVAC system just because it’s old?
Not on age alone. If it runs well and repairs are minor, keep maintaining it. Age matters when a large repair comes up: a big repair on a system near the end of its typical life is often better spent on a replacement.
How can I tell when my water heater was installed?
Look at the label on the tank. The manufacture date is often printed there or encoded in the serial number. A permit search with your city or county may also show the installation date.
Do home warranties cover old equipment?
It depends on the contract. Many home warranty plans exclude pre-existing problems or cap what they pay, so read the terms before relying on one for an aging system.