Where Should a Steam Shower Generator Be Installed? Closet, Vanity, Attic, or Basement

Published September 27, 2026

Summary

A steam generator belongs outside the steam enclosure in a dry, accessible indoor location. A nearby closet, vanity cabinet, conditioned attic, or basement can work if the exact model allows it. The closest empty space is not always the right one. The location needs a route for the steam line, water, electrical service, drainage, and control wiring, and it has to stay reachable for future service.

Service access matters from day one

A generator has water, electrical, drain, and steam connections. Even if it runs for years without trouble, someone may eventually need to reach the valves, terminals, or other service parts.

Amerec's manual says the location must allow access for service, with clearance for plumbing and electrical work and for removing the heating element. Where the generator sits somewhere hard to reach, Amerec wants an easy-to-reach shut-off valve on the water supply.

Closer usually makes the installation easier

A shorter steam line is easier to route, and it does not have to run sideways. MrSteam allows its generator to sit above the shower, as long as it is upright and level.

Amerec's AK generator needs a space of at least 7 cubic feet with 13 inches left clear for service. It can hang on a wall, sit on a shelf or a floor, or rest across ceiling joists, as long as it is restrained from moving.

An attic has to be truly suitable

Amerec lists attics and crawl spaces among its suggested locations, but the generator must be indoors, protected from freezing, and level side to side and end to end.

An attic hatch also has to serve as the service access. ThermaSol's manual says the access panel must be unobstructed and allow easy access.

A vanity can work, but it has to stay dry and ventilated

A cabinet location may be convenient, especially near the shower, but the generator still needs the clearances and ventilation specified for the unit.

ThermaSol's manual calls for a dry, non-combustible, well-ventilated space, which rules out packing towels, paper products, or cleaning supplies around the unit.

Draw the route before the tile goes up

The best time to choose the generator location is while the framing is still open. Put the steam line, water feed, electrical circuit, drain or auto-flush line, and control cable on the plan together.

Drawing it can show, for example, that a convenient cabinet has no reasonable path to the shower once the walls are finished.

Sources

Specifications, prices and installation requirements are as the makers published them on these pages on the date above and can change. Check the current manual and the retailer before you buy.