Electrical requirements
The circuit is the constraint nobody mentions until the crate is in the driveway. Here's how to know before then.
Manufacturers in this category publish kilowatts. They rarely publish amps, and they essentially never publish the breaker the code requires — which is the number that decides whether your purchase comes with an electrician’s invoice attached.
Both are derivable. Current is power divided by voltage; the National Electrical Code then requires a continuous load to be sized 25% above its draw. Neither step needs the equipment in front of us, which is why this is the one part of the category we can cover completely and honestly.
Cold plunge electrical is not published here yet, and we would rather say that than fill the slot. Of the five chillers we compare, not one publishes an amperage or a rated wattage. Without a manufacturer figure to work from there is no arithmetic to show, and inventing one would defeat the purpose of this section.
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Sources
- NEC 210.19(A)(1)(a) — minimum branch-circuit conductor ampacity — 2020 NEC. Conductors sized at noncontinuous load plus 125% of the continuous load. (accessed 2026-07-16)
- NEC 424.3(B) — fixed electric space-heating equipment — Space-heating equipment is a continuous load; conductors and overcurrent devices sized at 125% of the heating load. (accessed 2026-07-16)
- NEC 210.8(F) — GFCI protection for outdoor outlets (2023 NEC) — Applies to outdoor outlets on single-phase circuits 150V-or-less to ground and 50A-or-less. Exceptions apply; confirm with your AHJ. (accessed 2026-07-16)