The AS ColdPlunge 1HP is the top of the AS ColdPlunge chiller lineup — same brand, same external pump and filtration system as the 1/3HP, but with 2500W of cooling power that reaches 37°F and handles tubs up to 230 gallons. At $899 it sits in a crowded 1HP market. With only 6 reviews the data is thin, but the individual buyer accounts are detailed and the context from the broader AS ColdPlunge lineup tells a clear story. Here is the honest breakdown.
- Tubs over 100 gallons in hot climates
- Users targeting sub-40°F water temperatures
- Outdoor setups in summer heat
- Anyone who already trusts the AS ColdPlunge brand
- Users frustrated by 1/3HP limitations on larger tubs
- Small tub owners under 80 gallons — 1/3HP is enough
- Anyone who wants WiFi scheduling — not included
- Risk-averse buyers — only 6 reviews available
- Anyone prioritizing ozone/UV sanitation
What Is the AS ColdPlunge 1HP
The AS ColdPlunge 1HP is the high-power version of AS ColdPlunge’s chiller lineup, designed specifically for large tubs and hot climates. At 1HP / 2500W it delivers 37°F minimum temperature — 5°F colder than the 1/3HP model — and handles tubs up to 230 gallons where the 1/3HP is rated for 79 gallons. The physical unit measures 13″D x 16″W x 18″H with caster wheels, identical in form factor to the 1/3HP but significantly more powerful in cooling output.
The kit includes the same complete package as the 1/3HP external pump version: 1HP chiller unit, external pump and 20-micron filter system, submersible backup pump for standard bathtubs, 3 insulated hoses, fittings, tools, and a quick-start guide. The LED digital controller handles temperature setting and auto on/off cycling. There is no WiFi or app control — this is a significant omission at $899 compared to some competitors that include scheduling at similar price points.
One important detail: AS ColdPlunge currently offers a coupon that brings the price from $899 to $849. At $849 it sits directly against the PlungeFit 1HP at $899 as the closest same-power competitor — both are 1HP external pump systems with 20-micron filtration and no WiFi.
Performance — What the 6 Reviews Actually Show
Six reviews is a thin sample for a $849 purchase, and it is worth being upfront about that limitation. What those six reviews do show is consistent: four buyers report the unit performing exactly as described, with stable temperature maintenance, proper on/off cycling, and straightforward setup. One buyer specifically notes the unit handles their setup with ease and cycles properly without running continuously — the hallmark of a well-sized chiller for its application. Another buyer runs it daily and reports water staying consistently in the 45-50°F range, which is within expected performance for a 1HP unit on a typical tub.
The one 3-star review — the only non-5-star in the record — cites low water flow as the cause of slow chilling. This is consistent with what AS ColdPlunge 1/3HP users report as well: low flow is often a setup issue related to the filter valve position or an airlock in the filter housing rather than a fundamental chiller failure. The buyer does not report the unit stopped working, only that it was slower than expected.
The most detailed review in the record documents a buyer who had an issue with a previous unit. AS ColdPlunge responded quickly, presented multiple resolution options, and worked to find the right fit for the specific setup rather than offering a generic response. The replacement unit has been, in the buyer’s words, rock solid since day one. This mirrors the customer service pattern seen across the AS ColdPlunge 1/3HP reviews — responsive support when problems occur.
The Key Question — 1HP vs 1/3HP From AS ColdPlunge
Since both chillers are from the same brand with similar form factors, the upgrade decision is worth addressing directly. The 1/3HP external pump version costs $369 and handles tubs up to 79 gallons, cooling to 42°F minimum. The 1HP costs $849 with coupon and handles tubs up to 230 gallons, cooling to 37°F minimum. The price difference is $480 — significant enough to require justification.
The 1HP upgrade is worth it in three specific scenarios. First, if your tub is over 100 gallons — the 1/3HP will struggle in hot weather with larger volumes, and verified buyers confirm the 1/3HP punching above its rated capacity only works in favorable conditions. Second, if you are targeting water below 42°F regularly — the 1/3HP simply cannot reach that temperature. Third, if you live in a genuinely hot climate — Texas, Florida, Arizona summers — where ambient temperature significantly increases the cooling load.
For everyone else with smaller tubs in moderate climates, the AS ColdPlunge 1/3HP at $369 with the filter upgrade described in our review is the smarter value. The $480 difference buys a lot of replacement filters and brass fittings.
How It Compares to Key Competitors at the Same Price
At the 1HP level, the PlungeFit 1HP at $899 is the most direct competitor — it has a better rating (4.6 vs 4.3) and more reviews (16 vs 6), but costs $50 more without the coupon. Neither includes WiFi. For anyone who wants WiFi scheduling with 1HP power, the TURBRO at $1,399 is the only option in this comparison that delivers it, though it has just 2 reviews. See our complete cold plunge chiller comparison guide for the full market breakdown.
What Verified Buyers Say
The 1HP chiller has been performing exactly as expected — handles my setup with ease, maintains consistent temperatures, cycles properly without running continuously. Build quality feels solid and installation was straightforward. The support team responded quickly when I had an issue and worked with me to find the right fit. This current unit has been rock solid since day one.
I train a lot and was spending a stupid amount of money on ice. Now I just walk outside and jump in. The temp stays around 45-50°F which is perfect. I notice less soreness, better energy, and better sleep. If you’re serious about cold therapy, get the chiller.
Setup was pretty simple. Once the hoses were connected and the air was bled out of the filter, it just worked. It turns on and off automatically based on the set temp — the water is always ready when I am.
Seems to have low water flow which takes significant time to chill. Probably due to low flow.
Pros and Cons — Final Assessment
- 1HP / 2500W — genuine power for large tubs and hot climates
- Cools to 37°F — 5°F colder than 1/3HP models
- Handles up to 230 gallons
- External 20-micron filtration included
- Submersible pump for standard bathtub compatibility
- Caster wheels for mobility
- $849 with coupon — $50 cheaper than closest competitor
- 1-year warranty with 24-hour support response
- Only 6 reviews — very thin real-world data
- No WiFi — LED panel control only
- Same plastic fitting issues as 1/3HP — upgrade to brass recommended
- No ozone or UV sanitation
- Coupon-dependent price — verify before purchasing
Final Verdict — AS ColdPlunge 1HP
The AS ColdPlunge 1HP delivers on its core promise: 1HP of cooling power, 37°F minimum, handles large tubs and hot climates, and comes with a complete kit including filtration and a submersible pump. The buyer accounts are consistent and the customer service track record from the broader AS ColdPlunge lineup is genuinely good. At $849 with the coupon, it is the cheapest 1HP external pump chiller with filtration included currently on Amazon.
The two honest caveats that matter: only 6 reviews means you are buying on limited data, and the same plastic fitting issues documented in the 1/3HP apply here — plan to spend $15 on brass fittings and use plumber tape at every connection. Apply those fixes at setup and you get a chiller that multiple buyers describe as simply working, every morning, without needing attention.
If the low review count concerns you and you want slightly more validated performance data at the same price point, the PlungeFit 1HP at $899 has 16 reviews and a 4.6-star rating. The difference is marginal — both are solid 1HP options without WiFi.
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