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 and the Beyond Marina 1/2 HP WiFi Chiller are evenly matched, rated 3.3 and 3.2. The Fox Plunge 1/2HP Cold Plunge Chiller leads on value and noise. The Beyond Marina 1/2 HP WiFi Chiller wins on coldest. The Fox Plunge 1/2HP Cold Plunge Chiller costs $250.04 less ($449.95 vs $699.99).
Beyond Marina 1/2 HP WiFi Chiller
#3 in Up to 1/2 HPFull review
A cold-reaching 1/2 HP unit with app control for a covered patio tub. Add your own filter.
Amazon $699.99$699.99
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 1/2HP Cold Plunge Chiller for value ($900 per HP ($449.95, 1/2 HP) vs $1,400 per HP ($699.99, 1/2 HP)) and noise (40 dBA vs 49 dBA).
- Choose the Beyond Marina 1/2 HP WiFi Chiller for coldest (down to 37.4 °F vs down to 41 °F).
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 | Beyond Marina 1/2 HP WiFi Chiller |
|---|---|---|
| Overall rating | 3.3/5 | 3.2/5 |
| Value 30% | 76 $900 per HP ($449.95, 1/2 HP) | 59 $1,400 per HP ($699.99, 1/2 HP) |
| Coldest 15% | 50 down to 41 °F | 95 down to 37.4 °F |
| 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 | 80 49 dBA |
| Warranty 25% | 0 1-year warranty | 0 1-year warranty |
Specifications
| Fox Plunge 1/2HP Cold Plunge Chiller | Beyond Marina 1/2 HP WiFi Chiller | |
|---|---|---|
| Cooling | ||
| Compressor | 1/2 HP | 1/2 HP |
| Cooling capacity | - | 4,094 Btu/h |
| Lowest temperature | 41 °F | 37.4 °F |
| Largest tub | 132 gal | 250 gal |
| Water and build | ||
| Filter | Yes | - |
| App or wifi | - | Yes |
| Noise | 40 dBA | 49 dBA |
| Warranty | 1 year | 1 year |