What is on the record, September 21, 2026

Notes are dated. They record what was added, what changed, and what owners reported afterward. A note is not edited after publication; a correction is a new note that links back.

Calculators

Cost of ownership, downtime impact and operating time. Each prints its formula on the page, keeps cash, time and business impact apart, and never turns a blank into a zero.

Guides and research

Fourteen pieces on buying, running and repairing a cold plunge, built from published documents and documented ownership records, and a comparison of five brands’ published warranty and service provisions, read September 19, 2026.

The Plunge record

What Plunge publishes, one entry per dated source; the published warranty provisions; six research pieces; and where owners and customers publish elsewhere, described in our own words. The record.

Owner reports

Published only in the version the owner approved, with a label on each fact stating what was checked. How contributing works.