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EOS Invisio Midi Concealed Under-Bench Electric Sauna Heater-Stainless Steel

EOS Invisio Midi 9kW Concealed Under-Bench Electric Sauna Heater

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SKU 14-947547
Available Finishes: Stainless Steel
Voltage/Phase: 240V/2PH

The EOS Invisio Midi 9kW is a concealed under-bench electric sauna heater built for sauna rooms from 313 to 494 cu. ft. Installed beneath the sauna benches with only a 4" gap to the wall required, the Invisio Midi keeps the heater completely out of sight — freeing up interior space and eliminating contact risk during sessions.

The zinc-plated steel outer shell with stainless steel top cover, water splash gutter, and adjustable feet is built for long-term performance in demanding sauna conditions. Water splashes are still possible through the included stainless steel funnel and splash gutter system, which distributes water evenly across the width of the heater for consistent steam production. Heater height is adjustable to suit different bench constructions. Available in 208V/3-phase and 240V/2-phase configurations. Compatible with EOS EmoTec D and Touch 3 controls, sold separately. 44 lbs of 2"–4" (5–10 cm) sauna stones is required and sold separately.

Features

  • Concealed under-bench installation — 4" minimum gap to wall required
  • For sauna rooms 313–494 cu. ft.
  • Zinc-plated steel outer shell with stainless steel top cover and adjustable feet
  • Water infusion system with stainless steel funnel and splash gutter — distributes water evenly across heater width
  • Safety grill protects against objects falling onto the heater
  • Adjustable height (±2.4") to suit different bench constructions
  • Terminal box recessed in side panel
  • 44 lb stone capacity (sold separately)
  • Available in 208V/3-phase and 240V/2-phase configurations
  • Compatible with EOS EmoTec D and Touch 3 controls (sold separately)
  • Designed, engineered, and manufactured in Germany
  • CSA listed
  • 2-year warranty

Specifications

Room Size
313–494 cu. ft.
Power Rating
9 kW
Voltage / Phase / Amperage
240 V / 2 PH / 20 A
208 V / 3 PH / 35 A
Wire Size
12 AWG
Stone Capacity
44 lb (20 kg)
Stone Size
2"–4" (5–10 cm)
Dimensions
45.7"W × 15"D × 28–30.3"H (116 × 38 × 71–77 cm)
Minimum Ceiling Height
74.8" (190 cm)
Minimum Bench Height
63" (160 cm)
Safety Distance (front to back)
15.4" (39 cm)
Safety Distance (left to right)
50.4" (128 cm)
Weight
55 lb (25 kg)
Safety Listing
CSA
Warranty
2 years

What's Included

  • Invisio Midi electric sauna heater
  • 4 adjustable legs
  • Trough with connection hose
  • Protective grill
  • Stainless steel angled tube
  • Mounting material and warning plate
  • Installation and operation manual
  • 2-year warranty

Complete Your Setup

To install and operate this sauna heater properly, one of the following control units are needed:

Manuals & Resources

Installation & Operation Manual

Spec Sheet

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About EOS

About EOS

For over 75 years, EOS has built electric sauna heaters at its factory in Germany, and they're now trusted in residential and commercial saunas across more than 80 countries. Every heater reflects the same standard: precise engineering, quality materials, and designs bold enough to anchor the room.

Why Choose EOS?

Why Choose EOS?

  • Designed and manufactured in Germany
  • Full range of sizes and power ratings, from compact home saunas to commercial rooms
  • Sculptural designs that stand out
  • Matching controls and accessories to complete the setup
  • Optimized for North American market
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Match your control to your heater's power rating and features; every EOS heater's product page lists its compatible controls.

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