Thermal Protocol · Buyer's checklist
The recovery-equipment buyer's checklist
Every check below comes from the research behind our published guides — the things that actually generate post-purchase regret in this category. Run the relevant sections against any cold plunge or sauna you're considering before you hand over $1,000+. This page is print-friendly: Cmd/Ctrl+P gives you a paper copy to mark up.
Electrical
The single most common post-purchase surprise. Run these checks against the spec sheet before checkout, not after delivery.
- Confirm voltage: 120V plug-in vs 240V hardwire. A 240V unit means an electrician visit and possibly a panel upgrade — budget $300–$2,000+.
- Check whether the unit needs a dedicated circuit. A chiller pulling 1,500W on a shared circuit trips the breaker the first time someone runs a microwave at the same time.
- Verify GFCI protection — built into the cord, the unit, or required at the outlet. Water + electricity, no shortcuts.
- Measure cord length against your actual placement. Extension cords are excluded by most manufacturers' warranty and safety terms.
- If outdoor: confirm you have (or can add) a weather-rated outlet within reach.
Placement and footprint
Where it lives decides what you can buy — settle this first.
- Measure the full footprint including chiller, plumbing runs, and service clearance — not just the tub or cabin dimensions.
- Check the delivery path: door widths, stair turns, gate clearance. Flagship tubs and sauna panels ship big and heavy.
- Confirm floor load capacity for upstairs or deck placement — a filled 100-gallon tub is ~1,200 lbs before a person gets in.
- Plan drainage: where do 80–120 gallons go on water-change day, and can you gravity-drain or do you need a pump?
- Outdoor units: confirm a level pad (or budget pad prep), and check the spec sheet's ambient operating range against your climate.
- Renters: prefer no-permanent-install options — nothing hardwired, nothing plumbed, disassembles for the move.
True cost of ownership
The headline price is the floor, not the number you'll actually spend.
- Add shipping, liftgate delivery, install, and pad/electrical prep to the headline price — the delivered all-in commonly runs $500–$3,000 above sticker.
- Estimate monthly electricity from the duty-cycle wattage, not the peak rating (a well-insulated plunge chiller typically runs $15–$40/month; an infrared sauna $10–$25 at average US rates).
- Price the consumables: filter cartridges, water-care chemicals or ozone parts, replacement covers. Small line items, but they recur forever.
- Check the return policy's fine print: restocking fees and return freight on a 200-lb item can erase most of a refund.
- Inflatable and fabric tubs: assume a 3–5 year service life vs decades for hard-sided — divide price by realistic years when comparing.
Cold plunge specifics
- Confirm the real minimum water temperature — and whether it holds that floor in summer heat. "Cools to 37°F" at 70°F ambient is not the same claim at 95°F.
- Check time-to-temperature after a session: a chiller that takes most of a day to re-cool changes whether a second person plunges.
- Verify filtration AND sanitation (ozone or UV) — filtration alone means draining and refilling every few days.
- Match capacity to the tallest user: seated water line at the collarbone, legs actually submerged. Check the spec sheet's height rating.
- No chiller in the box? Price your ongoing ice budget honestly before calling the cheap tub cheap.
Sauna specifics
- Infrared: ask for third-party EMF/ELF test results at seating distance — "low-EMF" without numbers is marketing, not a spec.
- Infrared: check heater coverage and placement (front + back + calf), not just total wattage — cold spots are the top complaint in cheap cabins.
- Traditional: confirm the stove's kW rating matches the room volume, and budget the 240V circuit it almost certainly needs.
- Check the wood species and panel thickness — thin hemlock walls lose heat and warp; cedar and thick-stave construction cost more for a reason.
- Portable/blanket units: confirm wash-ability of liners and the realistic max temperature against your tolerance.
Warranty and vendor checks
The chiller (or heater) is the most likely part to fail and the most expensive to replace — warranty terms matter more here than almost any spec.
- Read the warranty term per component: tub/cabin vs chiller/heater vs electronics often carry different terms. 1 year on a $5,000+ purchase is thin — note it.
- Check for commercial-use exclusions if a gym, studio, or rental will ever touch it.
- Sanity-check the brand's longevity: support, parts, and warranty all vanish when a brand folds — it has happened to well-reviewed brands in this category.
- Confirm replacement parts are orderable (filters, gaskets, covers) without buying through support tickets.
- Screenshot the listed price and promo terms at order time — useful for price-protection requests and warranty disputes.
Ask the merchant before checkout
- "What's the all-in delivered cost to my zip code, including liftgate?"
- "What's the current lead time — and is that to ship or to deliver?"
- "If the chiller/heater fails in year one, what exactly happens — repair, replace, or parts shipped to me to install?"
- "What's the restocking fee and who pays return freight?"
- "Is this generation current, or is a refresh about to replace it?" (This category re-prices and re-generations every 6–12 months.)