Cold plunge & sauna repair and maintenance in Chicagoland.

The Cold Standard is a dedicated cold plunge and sauna service company serving Chicago and the surrounding suburbs as part of our nationwide service network. We're not a pool company that also touches plunges, and we're not an HVAC tech guessing at water chemistry — cold plunges and saunas are the only things we work on. We serve the city (Lincoln Park, Lakeview, the Gold Coast, the West Loop, Wicker Park, and beyond) plus the North Shore, the western and northwest suburbs, and the southwest suburbs — including Evanston, Wilmette, Winnetka, Highland Park, Lake Forest, Oak Park, Oak Brook, Hinsdale, Naperville, Wheaton, Elmhurst, Schaumburg, Barrington, Orland Park, and St. Charles.

Residential plans start at $169 every 4 weeks for our Essential plan (one full service visit per cycle). Premium is $299 every 4 weeks (biweekly visits plus quarterly deep clean). Weekly is $599 every 4 weeks for 52 visits per year ($150/visit effective) — the highest-density residential tier. Pay-as-you-go quarterly deep clean is $375 per visit if you handle weekly chemistry yourself, and a one-time deep clean is $399 flat for a single no-commitment service. Commercial plans (gyms, studios, hotels, spas) range from $279 every 4 weeks (Commercial Light) up to $999 every 4 weeks (Commercial Plus, twice-weekly visits). All recurring plans are month-to-month — cancel anytime.

Standard repair calls are scheduled within 48 hours of contact anywhere in the Chicago metro. Premium plan members get priority 24-hour scheduling. Commercial accounts get same-day emergency response. Our route covers roughly a 50-mile radius around the Loop — from the North Shore (Evanston up to Lake Forest) down to Orland Park and the southwest suburbs, and out through Oak Brook, Naperville, and Wheaton to St. Charles and the Fox Valley, with Schaumburg and Barrington to the northwest. Our service call is $170 flat — covers the trip out and a full diagnostic with a written estimate before any repair work begins. Repair labor is $185/hr with member discounts of 15–30%.

Many owners do, but the plunge has to be set up for it. Water that is circulating and holding temperature is much less likely to freeze than water sitting still — the real risk is a power outage, a tripped GFCI, or a chiller that shuts itself off during a polar-vortex cold snap because the air is below its minimum rated operating temperature, leaving still water in exposed plumbing and chiller lines. That's how lines, fittings, pumps, and heat exchangers crack. If you run through winter: use your unit's freeze-protection or heat mode if it has one (combo heat/cool units can hold water above freezing), keep a tight, insulated cover on, insulate or heat-trace exposed lines between the tub and the chiller, keep snow and ice clear of the chiller's air intake and exhaust, and have a plan for outages. If you'd rather not, we winterize it properly — full drain, line blow-out, pump and chiller drained per the manufacturer, cover secured — and come back for a spring start-up. Rated operating ranges vary by model, and freeze damage often isn't covered under warranty, so check your manual before deciding.

It's a common move in Chicago and often a good one — but indoors has its own checklist. Chillers reject heat and moisture, so in a closed basement or a sealed garage they recirculate their own warm air and raise humidity; give the chiller the clearances its manual calls for and consider an exhaust fan or dehumidifier. The unit should be on a properly sized, GFCI-protected circuit (we test GFCI function on every visit; new circuits are a job for a licensed electrician). Plan for draining — a floor drain or sump nearby makes water changes far easier — and remember floor load: a filled plunge plus a person can easily top a thousand pounds. And an unheated detached garage can still drop below freezing, so it isn't automatically freeze-safe. We're happy to look at the space with you before you move it.

Chicago summers are humid, and heat waves regularly push temperatures into the 90s. That's when a chiller works hardest: warmer, wetter air means less heat rejection per cycle, so units run longer and some can't hold setpoint. The usual culprits are dirty condenser coils (late-spring cottonwood fluff and summer debris clog them fast), restricted airflow from a unit tucked against a wall or fence, and an undersized chiller for the tub and the load. We clean coils, check airflow and refrigerant-side performance, and recommend scheduling annual chiller service in spring, before the June–August stretch.

Every major brand: Plunge, BlueCube, Renu Therapy, Cold Stoic, Ice Barrel, Edge Theory Labs, Morozko Forge, Polar Monkeys, Nordic Wave, Kodiak, Inergize, Tru Grit, and custom-built units. If a brand isn't listed, we still service it — we work on the entire category, not specific OEMs.

Yes. We service saunas across the Chicago metro — infrared, traditional electric (heater + stones), wood-fired, and steam rooms — for homes, gyms, athletic clubs, and recovery studios. We handle wood-safe deep cleaning, heater and emitter service, electrical and controls repair, and recurring hygiene maintenance. All brands, including Sun Home, Clearlight, Sunlighten, Harvia, Finnleo, and custom-built rooms.

Our Sauna Tune-Up & Inspection is $149 flat — a wood-safe interior clean, heater/emitter inspection, electrical and controls check, and a digital report with photos. The Sauna Deep Clean & Wood Care is $249 flat — everything in the tune-up plus a full hygiene deep clean, sweat-stain treatment, paraffin bench treatment, and heater stone service. Sauna repair is a $170 service call (trip + first hour), then $185/hr. Commercial rooms and recurring hygiene plans are quoted per facility.

All of them — infrared, traditional, hybrid, and steam. That includes Sun Home, Clearlight, Sunlighten, Harvia, Finnleo, and custom-built rooms. We use only manufacturer-approved, wood-safe cleaners (never bleach, ammonia, or abrasives that damage cedar and hemlock or void your warranty), and we document every visit with photos.

It depends a lot on where your water comes from. The City of Chicago and many inner suburbs draw treated Lake Michigan water, which is moderately hard — typically somewhere around 130–150 ppm — and much of DuPage County is on Lake Michigan water through regional water commissions as well. But parts of the far-west and northwest suburbs, including communities in Kane, McHenry, and Will counties, are on groundwater wells that can run much harder, often 300 ppm or more, frequently with iron that stains shells and fouls filters. Homes with water softeners bring a different chemistry again. Cloudy water is almost always imbalanced chemistry (pH out of the 7.2–7.6 range, low sanitizer), scale or iron where the supply runs hard, or biofilm in the filter and plumbing. We test your actual supply on the first visit rather than assuming a regional average, run a sequestrant protocol only where the hardness justifies it, and rescue most water without a full drain.

Yes — commercial accounts are a core part of our book. We service gyms, recovery studios, athletic clubs, boutique fitness facilities, chiropractor offices, med spas, hotels, and corporate wellness rooms — from the Loop, West Loop, and River North to the North Shore and the western suburbs. Commercial plans include compliance-grade documentation (water test logs, chiller inspection records, photo before/after), annual staff training, and 30% off repair work. Facilities that run both plunges and saunas can bundle both under one vendor and one visit.

Every visit includes: water chemistry test (pH, free chlorine, total alkalinity, calcium hardness, temperature), chemical balancing and sequestrant dosing as needed for your supply, filter inspection and cleaning or replacement, chiller and compressor health check, surface cleaning and biofilm prevention, pump and circulation inspection, a freeze-risk check on exposed lines and outdoor equipment in the cold months, and a detailed digital service report sent to you after we leave.

Yes. Initial setup, commissioning, and first-fill chemistry are handled by our team. If you've just purchased a plunge, we run a comprehensive initial setup visit that covers placement (including indoor ventilation and freeze exposure for outdoor units), electrical check, plumbing, first water fill and balance, chiller commissioning, and a complete owner walkthrough. The same visit works as a spring start-up for a plunge that was winterized — refill, leak check, recommissioning, and rebalance.

Pool techs are trained on chlorinated 80°F+ water in large-volume pools/spas — and in Chicago, most pool work stops for the season. Cold plunges run at 38–55°F year-round with concentrated bather load and chiller equipment that pool techs aren't certified to touch (refrigerant work is EPA-regulated). The chemistry, equipment, and failure modes are all different — from freeze damage in January to overworked chillers in July. We do only this — cold plunges and saunas — that's why our reports, parts inventory, and diagnostic playbook all match the specifics.

Yes. Saltwater plunges require titanium or marine-grade heat exchanger inspection, more frequent gasket and seal checks, and different sanitizer-balance logic. We carry the right test kits and replacement parts for both setups — brand doesn't matter, we calibrate the visit to your water chemistry and your supply's hardness profile, whether that's Lake Michigan water or a well.