Five years ago the only people asking us about cold plunges were physical therapists and one very committed surfer. Now it comes up at the counter every week. The category went mainstream fast, and the gear followed: everything from bare stock tanks to stainless systems with built-in chillers and app control.
That range is the problem. Most cold plunges are bought online, sight unseen, and the difference between a good one and a regrettable one does not show up in product photos. Here is what we tell people to check before buying one anywhere, including from us.
The Chiller Is the Product
A cold plunge without a chiller is a bathtub you fill with ice. That works for about a week, which is roughly how long hauling 20-pound bags outlasts the enthusiasm. A real unit pulls the water down to temperature and holds it there around the clock, so the plunge is ready when you are.
Two questions to ask about any model: how low does it actually go, and does the spec sheet say so in writing? Plenty of budget chillers advertise "cold" and then stall in the 50s once summer heat leans on them. The Therafrost we carry holds water at 37°F, set from an app on iOS or Android, and it stays there in July.
Filtration Decides Your Weekends
Cold water slows things down in the tub. It does not keep the water clean by itself. A plunge with no filtration or purification becomes a drain-and-refill chore on repeat, and that chore is the number one reason plunges end up on the curb in year two.
Look for a filter plus some form of purification. The Therafrost pairs a filter with built-in ozone purification, so the water stays clean between sessions without a shelf of chemicals. Filters are an inexpensive recurring item, and the ozone cell lasts a couple of years before replacement.
Inflatable or Stainless
Honest answer: an inflatable with a decent external chiller is a fair way to find out whether the habit sticks. It is the entry point, and there is no shame in starting there.
The trade-offs are durability. Liners can puncture, fittings work loose, and the sun and salt air out here age soft materials quickly. Stainless has no liner to puncture, nothing to fade or peel, and it handles coastal air far better. If you are buying once, buy the version you will not be replacing in two summers.
Where It Goes at a Beach House
A filled plunge weighs far less than a hot tub, but it still wants a level, solid surface. Most home units plug into a dedicated 120V 20-amp GFCI outlet. Outdoors at a Delaware beach home that usually means adding one, which is a small job for a licensed electrician.
Get an insulated cover and use it. It keeps the cold in and the leaves out, and it trims what the chiller has to work against. The chiller is what runs the meter, so plan for a modest monthly utility line, smaller if the cover stays on.
Summer Is Cold Plunge Season Here
People assume cold plunges are a winter purchase. At the beach it runs the other way. The ocean off Rehoboth spends much of the summer in the 70s, which is bath water by cold-plunge standards. If July is when you are active, sandy, and overheated, July is when a 37-degree tub earns its keep. Plenty of our customers like a quick cold dip after a morning run, a ride to Lewes, or an afternoon hauling beach chairs.
Pairing It With a Hot Tub
A good share of the people who buy a plunge from us already own a hot tub. Going back and forth between hot water and cold has become its own routine, and it is the reason our showroom carries all three categories under one roof. If that is the direction you are headed, our contrast therapy page walks through how people set it up at home.
What It Costs
We keep specific pricing out of blog posts because it changes. Broad strokes: inflatables with a chiller are the entry point, and hardshell and stainless systems with integrated chillers and filtration step up from there. Our 2026 cost guide covers the tiers in more detail. Financing is available through Del-One Federal Credit Union, subject to credit approval; rates and terms are set by Del-One.
See One Before You Buy
There's a Therafrost cold plunge on our showroom floor on Coastal Highway, next to the Saratoga hot tubs and the Sunlighten sauna. Come look it over and ask anything. Buying sight unseen is how most people end up with the regrettable version. Ten minutes in the showroom fixes that.
We are at 20660 Coastal Highway in Rehoboth Beach, open Monday to Friday 10am to 4pm and Saturday 9am to 1pm, and we deliver across Sussex County and the coastal Maryland towns. Call (302) 227-8484 with questions.
Cold water immersion is not for everyone. Check with your doctor before starting, especially if you have a heart or blood pressure condition, and follow the manufacturer's owner's manual.
Frequently Asked Questions
Do I need a permit for a cold plunge in Delaware?
The plunge itself, no. The outdoor electrical work usually requires a permit pulled by your licensed electrician, and some HOAs have their own rules. We flag what we know about your area when we talk through placement.
Can a cold plunge stay outside year-round at the beach?
Yes. A stainless unit with an insulated cover is built for it. Give it a level, solid base and keep the cover on between sessions.
Is an inflatable cold plunge good enough to start with?
It can be. It is the cheapest way to find out whether the habit sticks. The trade-offs are durability: liners can puncture, fittings work loose, and coastal sun and salt air age soft materials quickly.
What temperature does a Therafrost cold plunge hold?
It holds water at 37°F with its built-in chiller. You set the temperature from the app, iOS or Android, and it stays there.
Where can I see a cold plunge in person in Delaware?
New Wave Spas keeps a Therafrost cold plunge on the showroom floor at 20660 Coastal Highway in Rehoboth Beach. Open Monday to Friday 10am to 4pm and Saturday 9am to 1pm. Come look it over.
Come Look One Over
The Therafrost is on the floor, filled with questions we have already heard twice this week. Bring yours.
See the Cold Plunge PageOr call us: (302) 227-8484