Data sources
Where every number comes from
We cite every data point. If a source updates, the model updates. Nothing is invented.
Last reviewed July 19, 2026
| What it powers | Source | Used for | Updated |
|---|---|---|---|
| Appliance lifespans | NAHB / Bank of America Home Equity Study | Weibull scale (η) calibration; median expected life by category | Study vintage 2007; corroborated against InterNACHI 2023 |
| Inspection benchmarks | InterNACHI Standards of Practice | Cross-check on NAHB lifespans; failure-mode catalogue | Reviewed 2023 |
| Labor wages | BLS Occupational Employment and Wage Statistics (OEWS) SOC 49-9031 | National mean $24.10/hr; metro multipliers for 22 markets | May 2023 release (published April 2024) |
| Residential electricity & gas rates | EIA Residential Energy Consumption Survey (RECS) + Form EIA-861 | Annual energy spend per appliance; per-state electricity and gas rates | RECS 2020; Form EIA-861 2022 |
| Replacement cost indices | BLS Consumer Price Index — Household appliances (series CUUR0000SEHG) | Nominal replacement cost by appliance category, adjusted for inflation | Through April 2026 |
| Recall data | CPSC SaferProducts.gov / Recalls.gov API | UPC-to-recall lookup when user provides a serial/UPC number | Live — queried at request time |
| ENERGY STAR baselines | EPA ENERGY STAR Certified Products database | New-unit energy consumption for efficiency delta calculation | Snapshot June 2026 |
- Appliance lifespans
- NAHB / Bank of America Home Equity Study
- Weibull scale (η) calibration; median expected life by category
- Study vintage 2007; corroborated against InterNACHI 2023
- Inspection benchmarks
- InterNACHI Standards of Practice
- Cross-check on NAHB lifespans; failure-mode catalogue
- Reviewed 2023
- Labor wages
- BLS Occupational Employment and Wage Statistics (OEWS) SOC 49-9031
- National mean $24.10/hr; metro multipliers for 22 markets
- May 2023 release (published April 2024)
- Residential electricity & gas rates
- EIA Residential Energy Consumption Survey (RECS) + Form EIA-861
- Annual energy spend per appliance; per-state electricity and gas rates
- RECS 2020; Form EIA-861 2022
- Replacement cost indices
- BLS Consumer Price Index — Household appliances (series CUUR0000SEHG)
- Nominal replacement cost by appliance category, adjusted for inflation
- Through April 2026
- Recall data
- CPSC SaferProducts.gov / Recalls.gov API
- UPC-to-recall lookup when user provides a serial/UPC number
- Live — queried at request time
- ENERGY STAR baselines
- EPA ENERGY STAR Certified Products database
- New-unit energy consumption for efficiency delta calculation
- Snapshot June 2026