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
3.8/5
A strong 1 HP pick for a big tub or a hot climate, with ozone and app control included. Check the warranty with the seller before buying.
- 1 HPSize
- 9,553 Btu/hCooling
- 36 °FColdest
Check price at Amazon$1,299
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- About 9,500 Btu/h of cooling for the price of many 1/2 HP units
- Ozone plus two filter stages keep the water clean longer
- App schedules have the tub cold when you want it
- IPX4 and UV-resistant housing for outdoor use
Cons
- Warranty length not published
- Cools only, no heating
- Draws up to 14 A, so it wants a circuit of its own
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | FrostCore F85 |
|---|---|
| Cooling | |
| Compressor | 1 HP |
| Cooling capacity | 9,553 Btu/h |
| Lowest temperature | 36 °F |
| Largest tub | 132 gal |
| Pump flow | 3.5 gpm |
| Refrigerant | R32 |
| Water and build | |
| Filter | Yes |
| Sanitizer | Ozone |
| App or wifi | Yes |
| Voltage | 120 V |
Alternatives in this size
Icebound Essentials 1HP Hot + Cold
#3 in Over 1/2 HPFull review
A full-featured hot and cold 1 HP chiller for tubs of 100 gallons or more, at a premium price.
Amazon $2,499.99$2,499.99
GRAT 1.5HP Cold Plunge Chiller
#4 in Over 1/2 HPFull review
The cheapest way here to a big cooling number, for large tubs in warm places.
Amazon $799$799
Compare
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