Sun Home manufactures the saunas and cold plunges named in this guide. Specifications and prices were checked against the sources named in the Methodology and Sources section on September 22 and 23, 2026; "not found" means the figure was not found in those sources on those dates, not that it does not exist. Figures are labeled manufacturer specification, calculated from stated inputs, or illustrative assumption where the difference matters.
Short Answer
Commercial sauna cost depends on what you sell: a private booking, an individual admission, or access included in a membership. Divide the costs included in your operating model by those sale units, with energy and cleaning matched to the actual schedule. Report utilization scenarios and exclusions, and distinguish operating break-even from recovering the full initial investment.
Key Takeaways
- One denominator per result. A private cabin sells bookings; a shared room sells admissions. Never label both "per session" without stating the party size that converts one into the other.
- Pick the operating pattern first. A sauna kept warm for 14 hours uses energy during unbooked time; a sauna reheated for each booking needs that preheat inside the service cycle as well as the energy bill.
- In the worked example, a private Eclipse 2 costs about $5.57 per booking at 15 percent time utilization and $3.77 at 50 percent; a shared Nova 6 costs about $1.49 per admission at 15 percent and $0.45 at 50 percent, for the costs included.
- Break-even here means break-even for the included costs: 232 paid bookings a year for the private example and 902 paid admissions for the shared room at $15. It excludes rent, insurance, payment fees, laundry, HVAC, permits, financing and tax, and it does not repay the initial investment.
- Every input is an illustrative assumption or a dated price. Replace them with meter readings and quotes for a real facility and have an operations or finance reviewer reproduce the arithmetic.
The Sale Unit and the Costs Included
| Item | Private cabin example (Eclipse 2) | Shared room example (Nova 6) |
|---|---|---|
| Sale unit | One private booking (one party, one cycle) | One bather admission |
| Included: equipment and installation allocation | Yes, annualized over an analytical period | Yes |
| Included: maintenance allowance | 2 percent of equipment price per year (assumption) | Same |
| Included: energy | Preheat plus warm-ready hours at a duty cycle | Same |
| Included: cleaning | $3 per paid booking (variable) | $18 per day scheduled (fixed) |
| Excluded (add for your facility) | Rent allocation, insurance, payment processing fees, laundry, consumables, HVAC, permits, financing, tax treatment, extra staff time, downtime revenue loss | Same |
The annualization is an analytical cost allocation, not the business's accounting depreciation or a loan payment. A seven-year warranty does not establish seven years of commercial economic life; it is used here only as a stated assumption.
The Operating Pattern Behind the Numbers
Both examples keep the sauna warm and available for 14 hours a day, 360 days a year, with one 30-minute preheat before opening each day. Preheating does not consume the displayed opening hours. Energy during unbooked opening hours stays in the model because the cabin is drawing power whether or not it is sold. Holding the duty cycle constant across utilization levels isolates the effect of spreading fixed costs over more sales; in a real facility energy also moves with use, ventilation, room conditions and controls.
Energy formula: E = P x (A + H x f), where E is annual kWh, P the rated electrical input in kW, A annual preheat hours (0.5 x 360 = 180), H annual ready hours (14 x 360 = 5,040) and f the ready-period duty cycle. H is a different quantity from the R (reset minutes) used in the capacity formulas below.
Inputs and Results
| Input | Private Eclipse 2 | Shared Nova 6 | Label |
|---|---|---|---|
| Equipment price | $10,599 | $16,399 | Sun Home list price, September 22, 2026 |
| Installation | $800 | $2,000 | Illustrative assumption; get quotes |
| Annualization period | 7 years | 7 years | Analytical assumption |
| Annual maintenance | $211.98 (2 percent) | $327.98 (2 percent) | Illustrative assumption |
| Rated electrical input | 2.82 kW | 7.5 kW (HUUM DROP 7.5) | Manufacturer specification (Sun Home product pages) |
| Ready-period duty cycle | 35 percent | 60 percent | Illustrative assumption |
| Electricity price | $0.17 per kWh | $0.17 per kWh | Illustrative assumption |
| Cleaning | $3 per paid booking | $18 per day ($6,480 a year) | Illustrative assumption |
| Hourly capacity (from the capacity worksheet) | 1.425 bookings | 11.97 admissions | Calculated: T 30, R 10, D 0.05; and S 6, O 0.70, T 20, D 0.05 |
| Sale price | $15 per booking | $15 per admission | Illustrative assumption |
Current prices are on the product pages.
Capacity and utilization defined on this page
T is session minutes, R reset minutes, D the unavailable fraction of operating time, S usable seats and O the occupied fraction of seats during active use. Private bookings per hour per cabin: B = 60 / (T + R) x (1 minus D) = 60 / 40 x 0.95 = 1.425. Shared admissions per hour: Q = S x O x 60 / T x (1 minus D) = 6 x 0.70 x 3 x 0.95 = 11.97. Time utilization U is the share of that potential throughput actually sold during the 5,040 ready hours, after D has been applied once; annual sales N = hourly capacity x 5,040 x U. The companion capacity worksheet derives these values from the same inputs.
Annual fixed costs (calculated)
- Private: ($10,599 + $800) / 7 = $1,628.43, plus $211.98 maintenance = $1,840.41. Energy: 2.82 x (180 + 5,040 x 0.35) = 5,482.08 kWh = $931.95. Fixed total $2,772.36; cleaning is $3 per paid booking on top.
- Shared: ($16,399 + $2,000) / 7 = $2,628.43, plus $327.98 = $2,956.41. Energy: 7.5 x (180 + 5,040 x 0.60) = 24,030 kWh = $4,085.10. Scheduled cleaning $6,480. Fixed total $13,521.51.
Cost per sale unit by time utilization (calculated)
| Time utilization | Private bookings a year | Private cost per booking | Shared admissions a year | Shared cost per admission |
|---|---|---|---|---|
| 15 percent | 1,077.3 | $5.57 | 9,049.32 | $1.49 |
| 30 percent | 2,154.6 | $4.29 | 18,098.64 | $0.75 |
| 50 percent | 3,591.0 | $3.77 | 30,164.40 | $0.45 |
Annual volume is hourly capacity x 5,040 ready hours x utilization; fractional volumes are expected values used for calculation, and actual sales are whole numbers. Private cost per booking is $2,772.36 divided by paid bookings, plus $3 cleaning. Shared cost per admission is $13,521.51 divided by paid admissions. Do not compare the two columns as per-person prices without converting the private booking by actual party size (1.2 in the capacity worksheet).
Contribution, Break-Even and Payback
- Private contribution at $15 is $12 per booking after the $3 cleaning cost. Break-even for the included costs is $2,772.36 / $12 = 231.03, so 232 whole paid bookings a year (about 19 a month).
- Shared break-even is $13,521.51 / $15 = 901.43, so 902 whole paid admissions a year (about 75 a month), because the model has no per-admission variable cost.
- Payback is separate. Reaching these thresholds covers one year of the included costs; it does not repay the equipment and installation, which the model spreads over seven years. A financing cash-flow schedule and tax treatment need their own analysis.
- Low utilization is expensive for both formats. At very low use the ready-period energy and scheduled cleaning are divided among few customers, so neither format is cheap at "almost any" utilization.
Edge cases the worksheet must handle
- Zero paid sales: cost per sale unit is undefined, not zero.
- Price at or below the per-sale variable cost: no finite break-even while fixed costs are positive.
- Preheat for every booking instead of warm-ready operation: put the preheat inside the service cycle (it lowers capacity) and in the energy formula; do not reuse warm-ready capacity.
- Per-booking versus per-person pricing: apply the matching denominator and state the party-size conversion.
Bottom Line
Decide what you sell, list which costs you include, fix the operating pattern, and only then divide. On the illustrative inputs here a private Eclipse 2 costs roughly $3.77 to $5.57 per booking and a shared Nova 6 roughly $0.45 to $1.49 per admission, with break-even for the included costs at 232 bookings or 902 admissions a year at $15. Your facility's numbers will differ; the method is the deliverable.
Frequently Asked Questions
Is this cost per person or per booking?
Per booking for the private cabin and per admission for the shared room. Converting a private booking to a per-person figure needs the actual party size.
Does the sauna stay hot between sessions in this model?
Yes. Both examples assume warm-ready operation for 14 hours with one daily preheat, so unbooked hours still consume energy at the stated duty cycle.
What costs are excluded?
Rent, insurance, payment fees, laundry, consumables, HVAC, permits, financing, tax treatment and extra staff time. Add them as lines before relying on the result.
Does operating break-even repay the investment?
No. It covers one year of the included costs, with equipment and installation spread over seven years. Payback and financing need a separate schedule.
Methodology and Sources
Equipment prices are Sun Home list prices checked on September 22, 2026; rated electrical inputs are manufacturer specifications from Sun Home's product pages. Installation, duty cycles, maintenance, cleaning, electricity price, sale price and utilization are illustrative assumptions and are labeled as such. Hourly capacities come from the companion capacity worksheet with the same definitions. All results are calculated from the displayed inputs without hidden rounding. Sun Home manufactures the cabins named.
- Sun Home Eclipse help center (2,820 W rating)
- Sun Home Nova (HUUM DROP heater)
- Sun Home commercial saunas and cold plunges
- Sauna energy consumption and operating costs (home method)