Fox Plunge 1HP Cold Plunge Chiller
#2 in Over 1/2 HPFull review
A low-priced 1 HP chiller for a big tub, without the sanitizer or app of pricier units.
Amazon $669.95$669.95
The Fox Plunge 1HP Cold Plunge Chiller is the better cold plunge chiller overall, rated 3.4 to 2.5. The Fox Plunge 1HP Cold Plunge Chiller leads on value. The Plunge Pro Chiller wins on coldest and sanitation. The Fox Plunge 1HP Cold Plunge Chiller costs $3,320.05 less ($669.95 vs $3,990).
Plunge Pro Chiller
#12 in Over 1/2 HPFull review
An upgrade or replacement chiller for owners of Plunge tubs who want app control and ozone. Buyers with other tubs pay a lot for the name.
Plunge $3,990$3,990
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Fox Plunge 1HP Cold Plunge Chiller for value ($670 per HP ($669.95, 1 HP) vs $5,320 per HP ($3,990, 3/4 HP)).
- Choose the Plunge Pro Chiller for coldest (down to 37 °F vs down to 39 °F) and sanitation (filter and ozone vs filter).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every over 1/2 HP cold plunge chiller; a clear win is highlighted. How we rank explains each one.
| Factor weight | Fox Plunge 1HP Cold Plunge Chiller | Plunge Pro Chiller |
|---|---|---|
| Overall rating | 3.4/5 | 2.5/5 |
| Value 30% | 88 $670 per HP ($669.95, 1 HP) | 5 $5,320 per HP ($3,990, 3/4 HP) |
| Coldest 15% | 75 down to 39 °F | 100 down to 37 °F |
| Sanitation 10% | 50 filter | 85 filter and ozone |
| Heating 10% | 50 heating not stated (neutral score used) | 0 cools only |
| Noise 10% | 75 50 dBA | 50 noise rating not published (neutral score used) |
| Warranty 25% | 0 1-year warranty | 0 warranty not published, scored as none |
Specifications
| Fox Plunge 1HP Cold Plunge Chiller | Plunge Pro Chiller | |
|---|---|---|
| Cooling | ||
| Compressor | 1 HP | 3/4 HP |
| Lowest temperature | 39 °F | 37 °F |
| Heats | - | No |
| Water and build | ||
| Filter | Yes | Yes |
| Sanitizer | - | Ozone |
| App or wifi | - | Yes |
| Voltage | 120 V | - |
| Noise | 50 dBA | - |
| Warranty | 1 year | - |