The Cost of In-Suite Cold Plunge for Hotels
August 13, 2026 · 5 min read
In-suite cold plunge
A cold plunge inside a guest room or suite, so the guest uses it privately. With the HotelPlunge program it is the room's own bathtub, cooled by a chiller that rolls in.
The cost of in-suite cold plunge depends on one question: are you building something, or rolling something in? A built-in plunge is a capital project. A chiller that uses the bathtub already in the room is a piece of equipment.
This guide sets out the budget lines for the second route with the HomePlunge H3, the unit behind the HotelPlunge program, and shows how to size the number of units.
The short answer
The HomePlunge H3 lists at $2,999 per unit and is bought once. There is no installation cost: it connects to an existing bathtub in about five minutes with no plumber, no electrician, no contractor and no permit. There are no consumables, because the filter is reusable. Running costs are a tub of water per guest, power from a standard outlet and your team's time to deliver and drain. One unit serves many rooms because it rolls, so the number of units follows bookings, not room count.
Quick facts
- Unit: $2,999 list price per HomePlunge H3, bought once
- Installation: None. About five minutes of setup by your own team
- Rooms out of service: None
- Consumables: None. The filter is reusable and rinses every 4 to 6 weeks
- Power: A standard 110V outlet. The H3 draws 9A
- Guest price: Set by the property and billed to the folio
- Pilot: One unit, one suite, 60 days
The budget lines
| Line | What to budget |
|---|---|
| Unit | $2,999 list price per HomePlunge H3. Bought once. |
| Installation | None. Two insulated hoses over the rim and a standard outlet, in about five minutes. No plumber, no electrician, no contractor, no permit. |
| Rooms out of service | None. Nothing is built, so no room leaves inventory. |
| Consumables | None. The filter is reusable and rinses every 4 to 6 weeks. |
| Chemicals program | None. The tub drains after each guest. |
| Water | One fill of the bathtub per guest. |
| Power | A standard 110V outlet. The H3 draws 9A while it is cooling. |
| Labor | Your team's time to roll the unit in, fill the tub and drain it at checkout. |
Commercial pricing, the warranty for revenue-generating use and support terms are agreed in writing before any unit enters a room. Multi-unit pricing is discussed after a pilot proves demand.
How many units a property needs
A unit is not tied to a room. It weighs about 112 lb on casters, so housekeeping rolls it to whichever room booked it. The number of units follows the number of plunges booked on a night, not the number of rooms.
The return calculator works it out from three inputs: rooms with a bathtub, occupancy, and the share of those guests who book. Here is a property with 100 tub rooms at the calculator's starting assumptions: 62.3% occupancy, the US hotel average for 2025 (CoStar), with 2% of occupied tub rooms booking at $199 a night.
| Night to be ready for | Plunges that night | Units | Units, bought once |
|---|---|---|---|
| Average night | 1.2 | 2 | $5,998 |
| Peak season | 2.9 | 3 | $8,997 |
| Event weekend | 4 | 4 | $11,996 |
On those assumptions, guest revenue in year one is $90,503 from average nights alone, and a three-unit fleet sized for peak season is covered in 37 nights. Plunges sold on busier nights by the larger fleet are on top of that.
This is illustrative, not a forecast. Revenue is bookings a night times the guest price, 365 nights a year, before your own costs such as delivery labor, water and power. Peak season assumes 95% occupancy with 1.5 times the bookings of an average night. An event weekend assumes a sold-out house with twice the bookings. Use your own figures in the calculator.
What it earns
The guest price is set by the property and billed to the folio. The calculator's starting point is $199 a night, ordered from a card on the nightstand. At that price, 16 booked nights cover the $2,999 list price of one unit.
Spa directors can also price it as part of a contrast circuit with the sauna and steam they already run, or position one or two suites as recovery suites at a premium rate.
Running costs
Water. Each guest gets a fresh fill of the bathtub. The tub drains after each guest like any other on the floor.
Power. The H3 draws 9A from a standard 110V outlet while it is actively cooling, which is about one kilowatt. It takes tap water to 50°F in about 30 minutes. Price that with your own utility rate.
Maintenance. Rinse the reusable filter every 4 to 6 weeks. There is nothing to stock.
What a built-in plunge costs
A built-in plunge is a construction project: design, plumbing, drainage, permits and rooms offline while the work is done. Its price is whatever your contractor quotes for your building, so there is no honest single number to print here.
The useful comparison is line by line. Put the contractor's quote, the downtime and the ongoing water care next to the table above. The comparison guide sets the options side by side.
What a pilot costs
One unit in one suite for 60 days. If the pilot does not earn its keep, the unit rolls back out and there is nothing to un-build.
Frequently asked questions
How much does an in-suite cold plunge cost a hotel?
With the HomePlunge H3, the list price is $2,999 per unit, bought once, with no installation cost. Commercial pricing and warranty terms are agreed in writing. A built-in plunge is priced by a contractor's quote for the building.
Is there an installation fee?
No. Nothing is installed. Housekeeping or engineering connects two hoses over the rim of the tub and plugs the unit into a standard outlet in about five minutes.
What are the ongoing costs?
A fill of the bathtub per guest, power from a standard 110V outlet while the unit cools, and your team's time to deliver and drain. The filter is reusable, so there are no consumables.
Do we need one unit for every room?
No. The unit rolls from room to room, so the number of units follows how many guests book on a night. The return calculator sizes the fleet from your rooms with a bathtub.
Is there multi-unit pricing?
Multi-unit pricing is discussed after a one-suite pilot proves demand.
Run your numbers
Enter your rooms with a bathtub in the return calculator, or book a 15-minute call at HotelPlunge to talk through pilot structure and pricing. You can also email [email protected].