The System Lifespan Index

A list from the index

The systems you inherit at closing, shortest life first

The wet and seasonal systems on the index, the ones that announce themselves with water on the floor or a cold first week, ordered by when their range opens.

InspectedOctober 16, 2026figures as pulled

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8 systems, ordered by the near end (lifeLow) of each typical service-life range. Every system name opens its guide, with the planning arithmetic for your install year.

The systems you inherit at closing, shortest life first, as pulled October 16, 2026
#SystemLow (yrs)High (yrs)RangeCategoryHow it stopsCitation
1Garbage Disposal812ApplianceWetInterNACHI chart: Disposal (food waste): 12 years (undated); NAHB 2007: Disposers, Food Waste: 12 years
2Tank Water Heater812WaterWetInterNACHI chart: Water Heater (conventional): 6 to 12 years (undated); NAHB 2007: Water Heaters, Electric: 11 years; Water Heaters, Gas: 10 years
3Dishwasher912ApplianceWetInterNACHI chart: Dishwasher: 9 years (undated); NAHB 2007: Dishwashers: 9 years
4Clothes Washer1013ApplianceWetInterNACHI chart: Washing Machine: 5 to 15 years (undated); NAHB 2007: Washers: 10 years
5Heat Pump1016Heating and coolingSeasonalInterNACHI chart: Heat Pump: 10 to 15 years (undated); NAHB 2007: Heat Pumps: 16 years
6Central Air Conditioner1217Heating and coolingSeasonalInterNACHI chart: Air Conditioner (central): 7 to 15 years (undated); NAHB 2007: Air Conditioners: 10 to 15 years (HVAC table); Air-Conditioners, Unitary: 15 years (appliance table)
7Boiler1525Heating and coolingSeasonalInterNACHI chart: Boiler: 40 years (undated); NAHB 2007: Boilers: 13 to 21 years (HVAC table); Boilers, Gas: 21, Boilers, Electric: 13 (appliance table)
8Gas Furnace1520Heating and coolingSeasonalInterNACHI chart: Furnace: 15 to 25 years (undated); NAHB 2007: Furnaces: 15 to 20 years (HVAC table); Furnaces, Warm-Air, Gas: 18 years (appliance table)

A service-life range describes the type, not your unit. Age is a planning input; nothing on this page forecasts when any system in your house will stop.

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