Video · Furnaces and Heating
How Long Do Furnaces Last? An Old One Out, a New Rheem In
A gas furnace usually lasts around 15 to 20 years with regular care. Past that, more repairs, uneven rooms and rising bills are the signs it's worth pricing a replacement before it fails in a cold snap.
Job footageSwiftPro
- Topic
- Furnaces and Heating
- Length
- 0:13
- Posted
- August 5, 2026
- Shot by
- The SwiftPro crew, Northern Virginia
What you’re seeing in this video
The question on this one is what is that, and the answer is the old furnace cabinet as two techs carry it out through an unfinished basement, one in a black hoodie and grey cap, the other in a SwiftPro polo with a headlamp.
The finished install sits on a tiled floor: a new Rheem gas furnace with white PVC vent pipes, a condensate pump at its base and a red service switch on the wall, which lets a tech cut power right at the unit.
Why it matters in your house
- Age alone isn't a death sentence, but a furnace past 15 years that needs a major part deserves a repair-or-replace talk. Parts get harder to find, and efficiency is a generation behind.
- Watch for rooms that never warm up, a burner flame that looks yellow, rust on the cabinet, or a furnace that cycles on and off. Any two of those together is worth a call.
- Filters changed on time and a yearly check are what push a furnace toward 20 years instead of 12. Dust and overheating are what wear one out early.
Is a 20-year-old furnace worth repairing?
Sometimes, for a small fix like an igniter or flame sensor. For a big one, like a blower motor, control board or anything near the heat exchanger, most homeowners are better off putting that money toward a new furnace. A tech should also check the heat exchanger closely, since cracks become more common with age.
Want it done at your place? See Furnaces and Heating at SwiftPro or call (703) 997-9757.
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