Depending on the item in question, many factors can affect its
longevity. For example, what’s it made of? How has it been maintained?
Does it just lie there or does it have a lot of moving parts?
Average life expectancy in years of a thermostat and a compactor, respectively the longest-lived and shortest-lived appliances in the American home, according to the National Association of Home Builders/Bank of America Home Equity Study of Life Expectancy of Home Components. (See the table below for an alphabetized list of appliances.)
Keep in mind that the life expectancy listed here is just a general guideline—depending on the model and brand of appliances you buy and how well you treat them, your gear might last longer or might need replacing even sooner.
| Appliance | Life Expectancy (years) |
| Air Conditioners (room) | 10 |
| Air Conditioners (central) | 15 |
| Boilers (electric) | 13 |
| Boilers (gas) | 21 |
| Compactors | 6 |
| Dehumidifiers | 8 |
| Dishwashers | 9 |
| Dryers (electric and gas) | 13 |
| Freezers | 11 |
| Furnaces (electric warm air) | 15 |
| Furnaces (gas warm air) | 18 |
| Furnaces (oil warm air) | 20 |
| Garbage Disposers | 12 |
| Humidifiers | 8 |
| Microwave Ovens | 9 |
| Range/Oven Hoods | 14 |
| Ranges (electric) | 13 |
| Ranges (gas) | 15 |
| Refrigerators | 13 |
| Refrigerators (compact) | 9 |
| Thermostats | 35 |
| Washing Machines | 10 |
| Water Heaters (electric) | 11 |
| Water Heaters (gas) | 10 |
| Water Heaters (tankless) | 20+ |