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Remaining Useful Life

Every component has rings.
We count them honestly.

Install year sets the inner ring. Today's date sets the current ring. Expected lifespan sets the outer ring. The condition multiplier reshapes everything in between.

HVAC Condenser · Maple Property
Installed 2014 · expected lifespan 20 years · condition: Good
2014 EOL ring · Year 20 Today (Yr 12) Install (Yr 0)
Years used
12
Years left (×0.95)
7.6
EOL date
2034

Condition reshapes the rings.

A 12-year-old HVAC in Excellent condition still has more life than a 6-year-old one in Poor condition. The condition multiplier turns gut feel into a number.

Excellent
Good
Fair
Worn
Poor
Brand new
1.30×
1.10×
1.00×
0.75×
0.50×
25% used
0.98×
0.83×
0.75×
0.56×
0.38×
50% used
0.65×
0.55×
0.50×
0.38×
0.25×
75% used
0.33×
0.28×
0.25×
0.19×
0.13×
90% used
0.13×
0.11×
0.10×
0.08×
0.05×

Cell values are remaining-life multipliers — multiply by the component's expected lifespan to get years left.

Four life bands. One per ring zone.

Where the current ring lands tells you whether to relax, plan, reserve, or act now.

New (0–25%)
15+ years left

Repair anything. Component is decades from EOL.

Mid-life (25–60%)
8–15 years left

Repair sensible. Avoid premature replacement.

Aging (60–85%)
3–8 years left

Reserve cash. Run cost-per-year math on every repair.

EOL (85–100%)
< 3 years left

Replace next cycle. Repairs rarely break even.

The EOL forecast bar.

Every component on every property gets a single horizontal life bar — you see at a glance which ones are red.

HVAC condenser 7.6 yrs left
Roof (asphalt) 13 yrs left
Water heater 1.4 yrs left
Dishwasher 2.8 yrs left
Exterior paint 6.6 yrs left

Count Your Rings

Add any component and instantly see the rings, the EOL date, and the condition multiplier in action.

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