Active Aqua Water Chiller with Power Boost, 1 HP

Yes! The Active Aqua line has been a staple of the DIY cold plunge community for years, and the 1 HP is the largest unit in the lineup. It is built for oversized tubs, two-person plunges, and high-use setups where the chiller runs hard every day. Plunge Crafters is an authorized Active Aqua dealer, so every unit ships new with the full manufacturer warranty.

The digital set point adjusts from 39°F to 90°F, so you can dial in anything from deep cold therapy at 39°F to a milder recovery temperature. Once your water reaches the set point, the chiller cycles on and off automatically to hold it within a couple of degrees. With 10,050 BTU per hour of cooling capacity, the 1 HP pulls large tubs down to temperature faster than the smaller units and holds its set point even under heavy daily use. Your tub size, insulation, ambient temp and humidity still affect how cold you can get and how fast you get there.

It is rated for tubs ranging from 80 to 250 gallons, which makes it the choice for hot climates, two-person plunges, and gym or studio setups with heavy daily use. Running a tub in the 90 to 172 gallon range? The Active Aqua 1/2 HP is a better value. For compact tubs from 40 to 92 gallons, go with the Active Aqua 1/4 HP.

Not in the open elements. This model is approved for indoor and covered outdoor use, which makes it ideal for garage, basement, gym, studio, or covered patio cold plunge setups. If your plunge lives outside, choose an outdoor rated chiller instead: the Active Aqua 1/3 HP All in One has a rainproof housing and a GFCI protected power cord and is built for the elements. Shop all cold plunge chillers.

No. This chiller requires an external high flow water pump with a pre-filter, sold separately. We recommend the Danner 1200, which is built for continuous duty. Contact us and we will help match the pump and plumbing to your build.

Boost runs the chiller at maximum output to accelerate cooling, and it has two modes. Press Boost once for a 2-hour accelerated cycle, useful right after you fill the tub or do a water change. Press it twice for continuous 24/7 maximum chilling, which runs until you switch it off. Once your water is at temperature, you can leave the chiller in normal mode and it cycles automatically to hold the set point.

Not on its own. The chiller does not include built-in filtration. For clean, clear water between changes, add a cold plunge water filter and ozone sanitation to your cold plunge plumbing. Browse our water filtration and sanitation collection for options that fit your plumbing.

The Active Aqua 1 HP runs on standard 120V household power with a regular 3-prong plug, drawing 1100W and 10.2 amps during operation. That is more than double the draw of the smaller units, so give it its own circuit rather than sharing with other high-draw equipment. As with any equipment used near water, plug into a GFCI protected outlet, and never run it on an undersized extension cord.

The 1 HP ships with 1" and 1 1/4" barbed fittings to support its higher flow rate. Those are larger than the 3/4" plumbing used in most DIY cold plunge builds, so plan on reducer fittings if you are connecting to an existing 3/4" loop. Browse our fittings, hose and bulkheads collection for adapters, or contact us and we will spec the connections for your build.

Install it upright on a stable, level surface with at least 12 inches of clearance on all sides, including the back and top, so it can pull in air and dissipate heat. At 21" long by 15" wide by 20" tall and 75 lbs, this is the largest unit in the lineup, so plan your footprint before delivery. Keep it out of direct sunlight and away from high humidity and high heat sources. Never cover the unit or run it on its side. If it does get tipped, stand it upright and wait 20 minutes before powering it on to let the refrigerant settle.

Yes. The Active Aqua has a memory backup feature, so after an unexpected power loss it returns to your previous temperature setting automatically instead of resetting to the default.

Yes. Plunge Crafters partners with Truemed to make cold plunge purchases eligible for HSA and FSA funds. This allows you to pay with pre-tax dollars, which effectively reduces your out-of-pocket cost by 20 to 35% depending on your tax bracket. To use your HSA or FSA card, select the Truemed payment option at checkout. You will complete a short eligibility process through Truemed and then apply your HSA or FSA funds directly to your order. If you have questions about eligibility, visit our HSA/FSA program page for full details.