HUUM STEEL Sauna Heater
The STEEL is HUUM's column heater: a clean cylinder of stainless steel filled with stone. It suits members who want a large stone mass in a room where floor space and clearances are tight.
Member pricing is quoted directly with a specialist, and specifications and availability are confirmed on the same call.
What’s in this buildout
A heater never arrives on its own. The buildout is everything it needs to heat a room.
The heater
HUUM STEEL, floor standing: STEEL 3.5, STEEL 6, STEEL 9, or STEEL 10.5.
Controller, choose one
HUUM UKU Local or HUUM UKU Wi-Fi.
Sauna stones
HUUM sauna stones. Included and required.
Controller, choose one
Digital controller
HUUM UKU Local. Operated from the panel on the wall.
Wi-Fi controller
HUUM UKU Wi-Fi. The same control, plus starting and adjusting the sauna from your phone.
Your controller choice is confirmed in consultation alongside the electrical plan.
Sizing is matched to your sauna in consultation.
What we handle
We source quality products that we stand behind, for you, not for the brand, and we build the room around them.
Site preparation
Placement in the room, following the manufacturer's specification.
Delivery and placement
Freight coordination to your site, and the heater placed in the room it heats.
Assembly
Installed as part of the sauna build, with the stones loaded.
Electrical coordination
Electrical is coordinated through licensed electricians.
Protection
Guards and clearances set at install and checked when we come back.
Support after the build
Service and guidance after the build, from someone who picks up the phone in year three.


What we can put in writing.
Anything not listed here is confirmed with you during the consultation rather than published as a guess.
- Family
- HUUM STEEL Series
- Configurations
- STEEL 3.5, STEEL 6, STEEL 9, STEEL 10.5
- Mounting
- Floor standing
- Material
- Stainless steel
- Control
- HUUM UKU, local or Wi-Fi
About this buildout.
The design is deliberately quiet. The steel column sits back into the architecture of the room, and the stones do the work, holding heat and returning soft steam when water is ladled on.
For its footprint the STEEL carries a large load of stone, and it needs less clearance around it than most heaters of its kind, which is why it earns a place in smaller rooms.
Every STEEL buildout runs on the HUUM UKU control, local or Wi-Fi, with HUUM sauna stones. We match the model to your room during the consultation, then handle delivery, assembly, and electrical coordination, and confirm every detail with you.
Related buildouts.
Every buildout we offer
HUUM DROP Sauna Heater
Heater buildout: DROP Series sauna heater
See this buildout
HUUM HIVE and HIVE Mini Sauna Heater
Heater buildout: HIVE Series sauna heater
See this buildout
Harvia KIP Sauna Heater
Heater buildout: KIP Series sauna heater
See this buildout
Saunum AIR Sauna Heater
Heater buildout: AIR Series sauna heater
See this buildoutQuestions about the HUUM STEEL Sauna Heater.
The standard behind it.
What comes with every sanctuary we build.
- Sanctuary Builders
- Sanctuary Approved
- Local Service Guarantee
Read what they say about the build.
5.0 on Google across 80+ verified reviews. Each review below links to the original on Google.
“David, the owner, worked with us to get a high quality sauna. David is very responsive, knowledgeable, honest and responsive. He will have your sauna delivered to your home. He will then assemble the sauna and remove all the packaging. I highly recommend purchasing a sauna from Sauna Friend.”
Dennis DonovanFort Collins, CORead it on Google (opens in a new tab) “Sauna Friends were exceptional! They fixed my sauna door, added flashing, and reinstalled my sauna roof. I looked for sauna-specific professionals to do these repairs so I could be confident they'd know what they're doing, and they did.”
Jessmine AndersonColoradoRead it on Google (opens in a new tab) “Worthy of 10 stars! Went above and beyond to ensure we had full understanding in everything: the sauna we purchased, the ordering, delivery, and setup. Absolutely love our sauna and worth every penny. David was incredibly knowledgeable and went out of his way to over-deliver. Highly recommend working with David!”
Nicholas LoscalzoColoradoRead it on Google (opens in a new tab)
Four ways in. Pick the one that fits.
Call or text 720.780.4400
Texts start with Jarvis, our trained AI, for instant answers. Ask for a person any time.
Request member pricing
Tell us about the build. We send a detailed quote within one business day, with our Sauna Prep Checklist.
Request member pricingSchedule a 15-minute call with David
For builds that need more than a form can capture. We talk through the space and the plan.
Schedule a call (opens in a new tab)Email us
Questions on buildouts, electrical coordination, or timing. We read every message and reply.
support@saunafriend.comCreate Sanctuary.
Live Regenerated.
5.0 on Google across 80+ verified reviews

