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Home   /   Products   /   Thermasol PROIII-575 PRO Series III 15kW Steam Shower Generator – Up to 575 cu. ft.

Thermasol PROIII-575 PRO Series III 15kW Steam Shower Generator – Up to 575 cu. ft.

$4,536.00 $6,480.00

The Thermasol PROIII-575 is a 15 kW PRO Series III residential steam generator rated for steam showers up to 575 cubic feet. It pairs with any Thermasol steam control — ThermaTouch, SignaTouch or MicroTouch — and a SteamVection or Legacy 1/2" (OSS) steam head (control and steam head sold separately). It draws 69 amps at 240V and fits rooms of 396–575 cubic feet with standard 8 ft ceilings — ideal for a closet, vanity, basement or climate-controlled attic up to 50 feet away.

  • Smart Steam® (patented) temperature control for steady, precise comfort
  • FastStart technology – steam in seconds, not minutes
  • PowerFlush self-cleaning system flushes the tank automatically
  • SplitTank: water is preheated in a separate reservoir and fed to the boiling side at exactly the rate of steam production — constant steam with no temperature swings, and the water feeder stays out of the boil to limit scale
  • CAN Bus digital communication with all connected Thermasol controls and devices
  • Industrial-grade stainless steel tank
  • Installs up to 50 feet from the steam shower
  • Stainless steel drain pan and SteamVection housing kit included
  • No-questions-asked lifetime warranty – 2 years in-home parts & labor, lifetime at factory
  • Low-watt-density heating element
  • Made in the USA
Model PROIII-575
Power 15 kW
Max steam shower size 575 cu. ft.
Amperage 69 A at 240V
Recommended room size 396–575 cu. ft. (8 ft ceiling)
Water connection 3/8"
Drain connection 3/4"
Made in USA
Dimensions 13 15/16" W x 18 11/16" D x 11 15/16" H
Electrical 208–240V single-phase, dedicated breaker required
Included Stainless steel drain pan, SteamVection housing kit
Warranty Lifetime – 2 years in-home parts & labor, lifetime at factory

Multiply your shower's length x width x height to get its volume in cubic feet, then choose a generator rated at or above that number. Per Thermasol, wall materials do not change the generator size. For 9 ft ceilings, size up one model; for 10 ft ceilings, size up two (or contact us to confirm). Not sure? Send us your dimensions and we'll help you pick.

The generator can be installed up to 50 feet from the shower in a finished, climate-controlled space protected from the weather, with at least 6 inches of clearance on all sides. Keep it accessible for service — don't enclose it behind walls or inside a bench — and install it flat and level. Build the steam enclosure from non-porous, moisture-resistant materials such as porcelain or ceramic tile, tempered glass, and sealed grout (natural stone must be sealed regularly), with rust-resistant fixtures and moisture-safe seating such as teak. See the installation manual for complete requirements.

Art of Steam Co. is an authorized Thermasol reseller. Thermasol warranties apply only to products purchased from authorized resellers.

Questions about sizing, wiring, or compatibility? Contact the Art of Steam Co. team — we're happy to help.

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