Dren KTrain 1HP Hot and Cold Chiller
#1 in Over 1/2 HPFull review
A quiet 1 HP hot and cold chiller, if you can live without a stated warranty.
Amazon $1,199$1,199
The Dren KTrain 1HP Hot and Cold Chiller is the better cold plunge chiller overall, rated 3.9 to 3.4. The Dren KTrain 1HP Hot and Cold Chiller leads on sanitation and noise. The Fox Plunge 1HP Cold Plunge Chiller wins on value. The Fox Plunge 1HP Cold Plunge Chiller costs $529.05 less ($669.95 vs $1,199).
Fox Plunge 1HP Cold Plunge Chiller
#6 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
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 Dren KTrain 1HP Hot and Cold Chiller for sanitation (filter and ozone vs filter) and noise (46 dBA vs 50 dBA).
- Choose the Fox Plunge 1HP Cold Plunge Chiller for value ($670 per HP ($669.95, 1 HP) vs $1,199 per HP ($1,199, 1 HP)).
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 | Dren KTrain 1HP Hot and Cold Chiller | Fox Plunge 1HP Cold Plunge Chiller |
|---|---|---|
| Overall rating | 3.9/5 | 3.4/5 |
| Value 30% | 65 $1,199 per HP ($1,199, 1 HP) | 88 $670 per HP ($669.95, 1 HP) |
| Coldest 15% | 50 lowest temperature not published (neutral score used) | 75 down to 39 °F |
| Sanitation 10% | 85 filter and ozone | 50 filter |
| Heating 10% | 100 heats as well | 50 heating not stated (neutral score used) |
| Noise 10% | 95 46 dBA | 75 50 dBA |
| Warranty 25% | 50 warranty not published (neutral score used) | 0 1-year warranty |
Specifications
| Dren KTrain 1HP Hot and Cold Chiller | Fox Plunge 1HP Cold Plunge Chiller | |
|---|---|---|
| Cooling | ||
| Compressor | 1 HP | 1 HP |
| Cooling capacity | 9,212 Btu/h | - |
| Lowest temperature | - | 39 °F |
| Heats | Yes | - |
| Water and build | ||
| Filter | Yes | Yes |
| Sanitizer | Ozone | - |
| App or wifi | Yes | - |
| Voltage | - | 120 V |
| Noise | 46 dBA | 50 dBA |
| Warranty | - | 1 year |