DOE Energy Saver -- Sizing a New Water Heater
The only sourced sizing norm this site uses (gallons-per-use by fixture, and "First Hour Rating >= peak hour demand") -- competitors' sizing advice contradicts itself because none of them names a source for it.
- License class
- P — public domain / open US Government work, public domain.
- Attribution
- Not legally required — every figure derived from it still carries a source and date stamp.
- Fetch cadence
- The live page has been gone since 2026-07-03 -- DOE deliberately removed 1,600+ Energy Saver pages that week, this one included; it was deleted, not moved, and no successor URL exists. This project's fetcher still tries the live URL first on every run, in case DOE restores it, and falls back to the Wayback Machine's archived copy when it 404s -- so "cadence" here means how often that check is re-run (quarterly), not how often new data appears.
- Last fetched
- pipeline/compute/constants/doe-peak-hour-demand.yml (retrieved_at stamp)
Worth knowing
- The figure cited on this site comes from the Wayback Machine's last live capture, and the page says so -- an archived copy is never stamped as though it were a current fetch.
Last updated