Fox Plunge 1/2HP Cold Plunge Chiller
#2 in Up to 1/2 HPFull review
A cheap, quiet 1/2 HP kit for a large inflatable tub where 41 F is cold enough.
Amazon $449.95$449.95
The Fox Plunge 1/2HP Cold Plunge Chiller is the better cold plunge chiller overall, rated 3.3 to 2.6. The Fox Plunge 1/2HP Cold Plunge Chiller leads on value. The Fox Plunge 1/2HP Cold Plunge Chiller costs $1,050.04 less ($449.95 vs $1,499.99).
Penguin Outdoor 1/2 HP HE Chiller
#15 in Up to 1/2 HPFull review
A rugged outdoor chiller for a DIY plunge build.
Penguin Chillers $1,499.99$1,499.99
Prices were last checked November 3, 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 1/2HP Cold Plunge Chiller for value ($900 per HP ($449.95, 1/2 HP) vs $3,000 per HP ($1,499.99, 1/2 HP)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every up to 1/2 HP cold plunge chiller; a clear win is highlighted. How we rank explains each one.
| Factor weight | Fox Plunge 1/2HP Cold Plunge Chiller | Penguin Outdoor 1/2 HP HE Chiller |
|---|---|---|
| Overall rating | 3.3/5 | 2.6/5 |
| Value 30% | 76 $900 per HP ($449.95, 1/2 HP) | 28 $3,000 per HP ($1,499.99, 1/2 HP) |
| Coldest 15% | 50 down to 41 °F | 50 lowest temperature not published (neutral score used) |
| Sanitation 10% | 50 filter | 50 filter and sanitizer not stated (neutral score used) |
| Heating 10% | 50 heating not stated (neutral score used) | 50 heating not stated (neutral score used) |
| Noise 10% | 100 40 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 1/2HP Cold Plunge Chiller | Penguin Outdoor 1/2 HP HE Chiller | |
|---|---|---|
| Cooling | ||
| Compressor | 1/2 HP | 1/2 HP |
| Cooling capacity | - | 5,750 Btu/h |
| Lowest temperature | 41 °F | - |
| Largest tub | 132 gal | - |
| Water and build | ||
| Filter | Yes | - |
| Noise | 40 dBA | - |
| Warranty | 1 year | - |