AS ColdPlunge 1 HP Review: Top Cold Plunge Chiller
The AS ColdPlunge 1 HP chiller pairs serious cooling power with purpose-built cold plunge features, making it the best overall choice for dedicated setups.
The Good
- Powerful 1 HP cools tubs up to 250 gallons
- Purpose-built for cold plunge (not aquarium equipment)
- External pump and filter included
- Reaches 37°F therapeutic temperatures
The Bad
- Higher upfront cost than budget models
- Requires dedicated floor space
- Requires 110V outlet (standard household)
| Technical Specifications | |
|---|---|
| Power | 1.0 HP |
| Cooling Capacity | ~14,000 BTU/hr |
| Max Volume | 250 gallons |
| Temp Range | 37°F - 95°F |
| Noise Level | ~52 dB |
| Power Draw | ~800W |
| Included | External filter, pump, insulated hoses |
| Warranty | 1-year manufacturer |
Introduction
The AS ColdPlunge 1 HP Chiller is purpose-engineered for cold plunge applications, delivering professional-grade cooling that reaches a therapeutic 37°F. Unlike aquarium chillers repurposed for cold therapy, this unit is designed from the ground up for the demands of daily cold plunging.
Design and Build Quality
The AS ColdPlunge 1 HP features a robust metal housing with a powder-coat finish that resists outdoor weathering. The external filtration system uses a high-flow 5-inch filter that removes debris down to 20 microns, and the included pump delivers 1,200 GPH circulation — perfect for large tubs.
Key Features
- 1 HP Compressor: Enough power to chill 250 gallons to 37°F, making it future-proof for any home setup.
- External Filtration: High-capacity 20-micron filter keeps water crystal clear between changes.
- Insulated Hoses: Premium insulated lines prevent heat gain and improve efficiency by 15-20%.
- Cold Plunge Specific: Engineered for cold therapy applications with optimal flow rates and temperature ranges.
What to expect
We haven't tested this unit ourselves. This section is based on the manufacturer's published specs and general chiller sizing.
Cooling: AS ColdPlunge rates the 1 HP compressor (about 14,000 BTU/hr) for tubs up to 250 gallons and down to 37°F. More water takes longer to chill, so a 100-gallon tub will reach temperature much sooner than a 200-gallon one. The extra capacity is mainly useful in hot climates and for faster recovery after water changes.
Temperature control: The unit has digital temperature control with a 37°F to 95°F range.
Noise: The listed noise level is about 52 dB. A garage or outdoor spot is the usual placement for any compressor chiller.
Energy use: The listed power draw is about 800W while the compressor runs. Monthly cost depends on your climate, insulation, lid use and electricity rate; our cost calculator gives a rough estimate.
Filtration: An external 20-micron filter and pump are included. How long water stays clean depends on sanitizer and how the tub is used.
Verdict
The AS ColdPlunge 1 HP earns our Best Overall chiller rating for combining serious cooling power with purpose-built cold plunge features. Its rated 250-gallon capacity gives it more headroom for large tubs and hot climates than smaller chillers. The included filtration and insulated hoses deliver better value than buying aquarium equipment and improvising accessories.
Sources
The Bottom Line
“The AS ColdPlunge 1 HP chiller pairs serious cooling power with purpose-built cold plunge features, making it the best overall choice for dedicated setups.”
Complete Your Setup
Essential accessories to maximize your cold plunge experience
GAME Solar Digital Floating Thermometer
Monitor your plunge temperature with this accurate floating thermometer.
Dryrobe Advance Long Sleeve
Premium waterproof recovery robe designed for cold water swimmers. Rapid warmth with fleece lining.
Confer Plastics Handi-Step Spa Step
Sturdy, UV-resistant non-slip step rated to 300 lb for safe entry and exit from elevated cold plunge tubs.
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