Rated by Delta for a bigger room: Delta SteamScape 10kW Steam Generator
Delta lists for the SteamScape 10kW Steam Generator: Max Shower Volume: 450. For the SteamScape 7.5kW Steam Generator: Max Shower Volume: 250.
A steam generator from Delta, rated by the maker for up to 250 cu ft. Every figure below is Delta's own, linked to where it is published. Delta's published list price: $3,642 (List Price on deltafaucet.com, 29 Sep 2026).
Buy from DeltaAs published by Delta, read on 2026-09-29. Makers revise their products; check Delta's current specification before you buy. Each maker states its own sizing rule, if any; read it on the product page.
Delta lists for the SteamScape 10kW Steam Generator: Max Shower Volume: 450. For the SteamScape 7.5kW Steam Generator: Max Shower Volume: 250.
Amerec publishes a list price of $3,620; Delta publishes $3,642 for the SteamScape 7.5kW Steam Generator. Each product page names where its figure is published.
Side by side with the Mr. Steam MS400R. Both are steam generators, and the room sizes their makers state, before each maker's own sizing rule, overlap.
Side by side with the ThermaSol PRO Series III 240. These steam generators carry room-size ratings that overlap, as their makers state them before each maker's own sizing rule.
Side by side with the ThermaSol PRO Series III 395. Both are steam generators, and the room sizes their makers state, before each maker's own sizing rule, overlap.
Amerec · steam generator · 4.5 kW · rated by the maker for 60–90 cu ft
Amerec · steam generator · 6 kW · rated by the maker for 80–150 cu ft
Amerec · steam generator · 7.5 kW · rated by the maker for 100–200 cu ft
Amerec · steam generator · 9 kW · rated by the maker for 150–300 cu ft
Amerec · steam generator · 11 kW · rated by the maker for 200–400 cu ft
Amerec · steam generator · 14 kW · rated by the maker for 350–550 cu ft
Delta lists: Max Shower Volume: 250. Each maker states its own sizing rule, if any; read it on the product page.
Delta says: For natural stone or marble, multiply by 2.0. For ceramic or porcelain tile, or glass block, multiply by 1.35; Exterior Wall: For one, multiply by 1.1; for two, multiply by 1.2; Ceiling height: For a 9 ft. ceiling, multiply by 1.15; for a 10 ft. ceiling, multiply by 1.3; Note: If there is a skylight or outside window, select the next largest generator.
Delta lists: Kilowatts: 7.5kw.
Delta lists: 240V 1ph. Have a licensed electrician confirm your circuit against the installation manual before you buy. Related question: Which steam generators run on a 240 V circuit?
Delta lists: Breaker Capacity: 40. The installation manual and a licensed electrician have the final word.
Delta lists: Required Equipment - 5CH-250, 5CB-550, 5CH-550, and 5CN-550 Control Interface and Steam Head.
Delta lists: 1/2" Capped Drain line for Optional Auto Drain. Related question: Which steam generators drain or flush themselves?
Delta lists: Water Supply - 3/8" Compression Fitting, 120 PSI max; Steam Outlet - 3/4" Brass NPT male thread; Pressure Relief Valve - 3/4" NPT female thread; Drain Outlet - Capped 1/2" Brass NPT male thread. A licensed plumber should confirm them against the installation manual.
Delta lists: 15" x 6” x 15.5".
Delta lists: Steam Generators – Lifetime limited warranty; Electronic Parts for Steam Bath Generators, Controls, Spa Options and Accessories – two (2) years from the date the product is received by the original consumer purchaser.
Delta states: UL/cUL Listed.
Delta's own site showed $3,642 (List Price on deltafaucet.com, 29 Sep 2026). That is the maker's price, not a retailer's or Amazon's; prices change, and the seller's page shows the current one. Related question: How much does a steam generator cost?
More from Delta: all Delta products on Saunakivi.