Keep the date basis attached
An installation date and a manufacture date answer different questions. ApplianceAgeBook preserves the basis you choose and keeps an unknown age unknown instead of filling the gap with a serial-number guess.
Know your appliance. Plan what comes next.
Create an appliance record, organize inspection observations, and plan replacement reserves without guessing serial-number codes or declaring equipment safe.
Before you calculateFollow the evidence trail
- 01IdentifyLabel, model, and date basis
- 02ObservePreserve inspection wording
- 03PlanReserve for replacement
Saved on this browser
No cloud sync. Avoid saving sensitive records on a shared browser.
Illustrative starting inputs. Replace them with your own measurements and evidence.
The home record
Computed locallyA maintenance record, not an automatic diagnosis.
A quick receipt first, then the assumptions, evidence gaps, findings, and reserve math behind it.
Keep age, condition, and evidence separate
Age alone does not establish remaining life, warranty coverage, reliability, or safe operation.
Record cardDocumented evidence
Documented age10.2 yearsTime since installation; manufacture can be earlier
Safety-tagged findings0Preserved from your structured observations
Planning cardReplacement reserve
Replacement planning range$1,364.00–$2,120.00Entered materials, labor, and material tax
Monthly reserve scenario$72.58Midpoint cost over 24 months; no investment return assumed
Replacement cost breakdown (low estimate)
USDMaterial $800.00Material tax $64.00Installation labor $500.00
Show breakdown as a table
| Line | Amount |
|---|---|
| Material | $800.00 |
| Material tax | $64.00 |
| Installation labor | $500.00 |
Inspection findings, original wording preserved
| No matching records. Add records or adjust your filters. | |||||
Documentation gaps
| Serial-number decoding | Not performed: no verified manufacturer rule is assumed |
| Manufacture-date evidence | Not established |
| Service-life range | 8–15 years, entered planning assumption only |
| Warranty / recall / safety status | Not determined |
Reference figures for Water heater (tank) (verify for your case)
| Typical service life | 8–12 years |
| Common failure point | Tank corrosion and leaking; anode rod depletion |
| Typical warranty coverage | Typically 6–12 years on the tank |
| Source | General published guidance, not a model-specific lookup |
Repair vs. replace cost signals
| 50% rule | Not entered: add a repair quote to see this signal | Compares your repair quote with the low replacement estimate; a common informal threshold is 50% |
| Cost per remaining year, repair | Not entered | Repair quote divided by 1.3-year estimated remaining life |
| Cost per remaining year, replace | $184.35/year | Low-high midpoint of planning-life divided into the replacement range midpoint |
| Estimated annual energy/water savings | Not entered: add current and new annual costs | Current annual operating cost minus the estimated new-unit annual cost, both self-reported |
| Simple payback period | Not applicable | Low replacement estimate divided by annual energy/water savings only, ignoring financing and installation timing |
Before you act
- Gas, electrical, fire, refrigerant, water, and structural concerns require appropriate qualified review. Follow emergency-service guidance for an immediate hazard.
- The planning-life and cost ranges are user-entered assumptions, not model-specific service-life or local contractor quotes.
- Reports can contain personal information. Imports and saved plans remain local; review exports before sharing.
Calculation notes & limitations
Age is elapsed days from the documented date divided by 365.2425 for display. Installation date does not establish manufacture date.
Replacement range = entered material range × (1 + material tax) + installation allowance. Monthly reserve uses the range midpoint divided by the chosen horizon.
Structured observations are displayed verbatim after HTML escaping. Severity is supplied by the user or inspector, not inferred or downgraded.
Reference figures are general published ranges for the selected appliance category, not a model-specific lookup; always verify against your unit’s own documentation.
The 50% rule and cost-per-year signals compare user-entered figures only; they do not account for financing, energy-efficiency rebates, or emergency-service premiums.
ApplianceAgeBook / no guesswork hidden
ApplianceAgeBook: appliance age & replacement reserve planner
Create an appliance record, organize inspection observations, and plan replacement reserves without guessing serial-number codes or declaring equipment safe.
The bookplate / signature view
Date, condition, and reserve.
A calm home record is easier to revisit than a one-time verdict. This illustrative starting card shows the visual language; your entered evidence drives the receipt below.
AGE INDEX / EXAMPLE10.2years recorded
A useful record leaves room for uncertainty.
Make the reserve explainable
The replacement range shows material, tax, and installation separately. The monthly figure is a planning scenario across your chosen horizon, not a prediction of failure or a contractor quote.
Leave observations in their voice
Structured findings retain original wording, evidence, severity, and next action. A clean receipt helps a future homeowner or inspector pick up the thread without turning an observation into a diagnosis.
The method is part of the tool.
Record whether the known date is installation, manufacturer-confirmed manufacture, or unknown. Never guess a serial-number decoding rule.
Preserve original inspection wording, evidence, severity, and recommended action. Keep safety findings ahead of budget planning.
Build an explicit replacement-cost range and a monthly reserve scenario from user-entered prices, tax, labor, and timing.
Read the full methodologyEvidence before certainty.
Age and model identity cannot establish safety. This tool does not inspect appliances, validate a serial code, diagnose faults, or replace qualified inspection.
These are reference sources, not evidence that example records have been verified. Imported records retain the source links you provide.