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Insignia Signature 18kW Commercial Steam Generator Set — Starter Collection

£4,236.05
18kW Commercial Steam Generator
Commercial Fast-Steam Mode + SOS Alarm
3-Phase Supply Required (380–415V)
Sized for the Largest Steam Rooms of 16–22 m³
Two-Man Delivery
Free UK Delivery

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  • Product Description
  • Specifications
  • Buying Guide
  • Delivery & Installation
  • Warranty
  • Return Policy
  • Resources
Product Description -

Insignia Signature 18kW Commercial Steam Generator Set — Starter Collection

The Insignia Signature 18kW Commercial Steam Generator Set is the most powerful generator in the Signature range — a complete starter kit for the largest commercial steam rooms (spas, gyms, health clubs, hotels and wellness facilities). It's the generator that produces the steam, supplied with the lighting, control and water-treatment components to finish the installation. With 18kW of output it suits steam rooms of around 16–22 m³.

The Signature generator is built from stainless steel inside and out and uses Sectional Heating Technology — nine 2 kW heating elements fire together for a fast start, then stage down to hold temperature efficiently. As the largest unit it uses two 3/4" steam outlets for even steam distribution. A waterproof digital touch-control panel runs temperature, run time, humidity and lighting, with a commercial Fast-Steam mode (80 °C standby, steam in seconds, energy-saving 30-minute auto-revert) and an SOS emergency alarm. Automatic fill, top-up and drain, plus overheat and low-water protection, keep operation safe. The Starter set adds six colour-changing LED lights, a water-treatment cartridge, a stainless-steel steam nozzle and an aluminium caution sign.

As an 18kW unit it must be connected to a 3-phase (380–415V) supply by a qualified electrician — it will not run on a standard single-phase circuit. It is delivered two-man kerbside with free UK delivery; professional installation is available, or it can be fitted by your own qualified trades. (The same generator switches between domestic and commercial modes.)

Technical Specifications

  • Model: Signature 18kW Commercial Steam Generator Set — Starter (SKU T18C0M-A)
  • Brand: Insignia
  • Power: 18 kW (range's most powerful)
  • Supply: 3-phase 380–415V only
  • Current: 27.3 A
  • Elements: 9 × 2 kW
  • Breaker: 25 A (installer to confirm to BS 7671; RCD required)
  • Room volume: 16–22 m³
  • Generator size: 510 × 185 × 460 mm
  • Build: stainless steel
  • Control: waterproof touch panel + commercial fast-steam mode + SOS alarm
  • Lighting: 6 chromotherapy LEDs
  • Water treatment: cartridge included
  • Water: cold ½" feed via cartridge (max ~8 bar); ¾" drain 
  • Steam outlets: two 3/4", copper/stainless pipe only (do not cross)
  • Delivery: two-man kerbside, free UK delivery; installation available or own fitter 
  • Warranty: 12 months (→ 2 years with approved water processor)

Safety & Usage Guidance

Steam rooms are for healthy adults only. Display the caution sign and observe the following (per Insignia's safety guidance):

  • Never allow children to use the steam function — this is for adults only, and never leave children unattended near the steam room.
  • Do not use the steam room if you are pregnant, have a heart condition, or have low or high blood pressure. If unsure, consult a GP before use.
  • Consult a GP before use if you have any underlying health condition that could be aggravated, or if you take any medication (especially with drowsy side-effects).
  • Exit immediately if you feel dizzy, faint or short of breath, and consult a GP if symptoms develop.
  • Never use the steam room after alcohol or other substances.
  • Be aware of the steam-outlet position — never sit in close proximity to it.
  • Proper ventilation is recommended. Always turn the power and water supply off after use.
Specifications +

 The Insignia Commercial Steam Generator Specifications

Specification Details
Brand Insignia
Model Signature 18kW Domestic Steam Generator Set — Starter
SKU T18-DOM-A
Power Output 18 kW (range's most powerful)
Electrical Supply 3-phase 380–415V only
Current Draw 27.3 A
Heating Elements 9 × 2 kW
Circuit Breaker 25 A (installer to confirm to BS 7671; RCD required)
Room Volume 16–22 m³
Generator Size 510 × 185 × 460 mm
Build Material Stainless steel
Control System Waterproof digital touch panel
Lighting 6 chromotherapy LEDs
Water Treatment Cartridge included
Water Supply & Drain Cold ½" feed via cartridge (max ~8 bar); ¾" drain
Steam Outlets Two ¾", copper/stainless pipe only (do not cross)
Delivery Kerbside, free UK delivery; installation available
Warranty 12 months (extendable to 2 years with approved water processor)
Buying Guide +

The Insignia Commercial Steam Generator Buying Guide

1. Size the generator to your room Steam generators are matched to room volume (m³). Insignia's Signature range:

Model

Phase

Suitable Room Volume

7.5 kW

Single or 3-phase

6.5 – 9 m³

10.5 kW

3-phase only

9 – 12 m³

12 kW

3-phase only

11 – 14 m³

15 kW

3-phase only

13 – 18 m³

18 kW (this set)

3-phase only

16 – 22 m³

The 18kW is the largest unit, for the biggest commercial rooms. High ceilings, heavy tiling or stone, and frequent door use raise heat loss — the 18kW is the right choice for large or busy rooms.

2. Check your electrical supply (important) This 18kW model is 3-phase (380–415V) only — it cannot run on single-phase. You'll need a qualified electrician to provide a 3-phase circuit with an RCD and isolator.

3. Plan water, drainage and the generator location The generator needs a cold-water feed and a drain, and should sit in a dry, ventilated plant area within a short pipe run of the steam room. The 18kW has two steam outlets (two separate copper/stainless pipes). Steam and drain pipes must be copper or stainless steel (never plastic).

4. Why the Starter (commercial) set This set includes the generator, six LED lights, water-treatment cartridge, commercial fast-mode button, caution sign and control gear. The Premium set adds an Auto Twin Descaler (low-maintenance, and unlocks the longer component-warranty terms); the Platinum set adds salt therapy, aromatherapy and a heavy-duty exhaust fan.

5. Delivery & installation Delivered two-man kerbside with free UK delivery. Professional installation is available, or install with your own qualified trades.

Delivery & Installation +

Delivery & Installation

Delivery Free UK delivery, two-man kerbside. Check the contents on arrival against the included-items list and report any transit damage immediately.

Installation (professional available, or your own fitter) The set is supplied for installation into a prepared steam-room enclosure. The generator is mounted in a dry, ventilated plant area within pipe reach of the room; the two steam outlets, LED lights and control panel are fitted, and the unit is connected to water, drain and power and commissioned. Professional installation is available, or your own qualified trades can install it.

Electrical (must read — 3-phase only) This 18kW generator is hard-wired to a 3-phase 380–415V supply by a qualified electrician — it cannot run on single-phase. Key requirements (per the install manual):

  • A 5-core supply to the generator terminals (L1/L2/L3, neutral, earth); minimum live/neutral 4.0 mm², earth 2.5 mm² (Insignia specify 5 × 4 mm² for the 18kW) — the electrician will size to the load and to BS 7671.
  • An RCD must be fitted on the supply, plus a means of isolation (the controller's on/off does not cut the mains).
  • All work to comply with Part P and local/national wiring regulations, by a competent electrician.

Water & drainage A cold-water feed only (½", through the treatment cartridge and a flexible stainless hose; fit a pressure-reducing valve if supply pressure exceeds ~8 bar) and a ¾" drain (copper/stainless, downward gradient to waste). No water pump is required.

Warranty +

Manufacturer's Warranty

The Insignia Signature steam generator comes with a 12-month warranty as standard, which upgrades to two years with the additional purchase and installation of an approved Insignia water processor/filter (the included water-treatment cartridge is the qualifying component).

Insignia also publishes a component-level warranty schedule with enhanced terms when an automatic descaling system is fitted. This Starter set does not include the auto descaler (it's part of the commercial Premium set), so the standard terms apply; fitting the auto descaler unlocks the longer terms below.

Component

With Auto-Descaler

Without (this Starter)

Controller

2 years

2 years

Heating element

2 years

1 year

Steam generator body

5 years

1 year

Water-level / temperature sensor

2 years

1 year

Control box / drain valve

1 year

1 year

LED lights

1 year

1 year

Conditions

  • Cover requires correct installation by competent trades, use of a cold-water supply, and regular descaling/maintenance (frequent for commercial use).
  • Excludes scale damage from missed maintenance, misuse, and non-original parts.
  • Register your warranty and keep your proof of purchase. Full terms: insigniashowers.com/warranty-terms.

We'll confirm the exact warranty position for your order 

Return Policy +

Returns and Refunds Policy

As a UK-supplied product, this steam generator set is covered by your standard statutory rights.

1. Your Statutory Rights

  • Under the Consumer Rights Act 2015, goods must be of satisfactory quality, fit for purpose and as described.

  • Where the Consumer Contracts Regulations 2013 apply, a 14-day cancellation right is available for unused, uninstalled goods in their original packaging (business-to-business orders may differ — confirm at point of sale).

2. Before You Install

  • Confirm your 3-phase supply and room size before installing. Returns cannot be accepted once installation/commissioning has begun.

3. Inspection on Delivery

  • Inspect your delivery on arrival and report any transit damage to contact@balancerecovery.co.uk within 48 hours with photographs.

4. Faults & Defects

  • Manufacturing faults are handled under the warranty above and your statutory rights — contact our team and we'll coordinate inspection, repair or replacement.

5. Contact

  • Email contact@balancerecovery.co.uk — we aim to respond within one business day.

Resources +

Installation & User Manual (Signature 18kW)

Product Overview

Insignia Signature 18kW Commercial Steam Generator — The Complete Starter Set

The Insignia Signature 18kW Commercial Steam Generator Set is the most powerful generator in the Signature range, built for commercial environments — spas, gyms, health clubs, hotels and wellness facilities with the largest steam rooms. It's the generator that turns a tiled or sealed enclosure into a working steam room, supplied with the lighting, control and water-treatment components to finish the installation. With 18kW of output it heats steam rooms of around 16–22 m³.At its heart is a stainless-steel steam generator (inside and out) with Sectional Heating Technology for a fast start, a waterproof digital touch-control panel, and automatic water management (auto-fill, auto top-up and auto-drain) with overheat and low-water protection. As the largest unit it uses two 3/4" steam outlets for even steam distribution. For commercial use it adds a Fast-Steam mode (rapid steam with an energy-saving auto-revert) and an SOS emergency alarm, plus six chromotherapy LED lights, a water-treatment cartridge, a stainless-steel steam nozzle and an aluminium caution sign.As an 18kW unit it must be wired to a 3-phase (380–415V) supply by a qualified electrician — it cannot run on a standard single-phase supply. Delivered two-man kerbside with free UK delivery; professional installation is available, or it can be installed by your own qualified trades.

Why Choose Insignia Signature 18kW Commercial Steam Generator Set?

The range's most powerful commercial steam generator, for the largest rooms.

The Most Powerful in the Range

At 18kW it's Insignia's biggest Signature generator — for the largest commercial steam rooms of around 16–22 m³.

A Complete Commercial Starter Set

More than a bare generator: the set adds a commercial fast-steam button, caution sign, six LED lights, a water-treatment cartridge, steam nozzle, control panel and control box.

Twin Steam Outlets

As the largest unit it uses two 3/4" steam outlets for even, efficient steam distribution across a big room.

Fast, Efficient Commercial Steam

Sectional Heating Technology plus the Commercial Fast-Steam mode deliver rapid steam and an energy-saving 30-minute auto-revert if it's left on.

A Premium Wellness Amenity

A well-run steam room is a genuine draw for guests and members — supporting memberships, dwell time and a premium wellness offer.

UK-Supplied with Warranty & Support

Supplied in the UK with a manufacturer warranty (12 months, upgradeable to 2 years with an approved water processor) and UK back-up.

Wellness Benefits

Why a steam room is a draw for commercial wellness spaces.

Relaxation & Stress Relief for Guests

Warm, humid steam is a simple, time-honoured way for adults to relax and unwind — a sought-after amenity in spas and clubs.

A Soothing Warm-Steam Ritual

Many people find warm steam comforting and pleasant for breathing and a sense of "clearing the head".

Post-Workout & Post-Pool Recovery

A warm steam session is a popular way for members to relax tired muscles after the gym, a class or a swim.

Chromotherapy Mood Lighting

Six colour-changing LEDs let venues set a calming or uplifting colour mood for the steam room.

A Premium Guest Experience

A steam room rounds out a wellness suite alongside saunas and pools, elevating the overall guest experience.

Membership & Revenue Draw

A reliable, premium steam room is a genuine attraction that supports retention, room rates and dwell time.

Premium Features

Signature details of the Insignia 18kW commercial Starter set.

Stainless-Steel Generator

Stainless-steel construction inside and out for durability against constant heat and moisture in commercial use.

Most Powerful Sectional Heating + Commercial Fast-Steam Mode

Nine 2 kW heating elements for a rapid heat-up across the largest rooms, plus a commercial fast-steam mode (≈80 °C standby, steam in seconds) with an energy-saving 30-minute auto-revert.

Twin 3/4" Steam Outlets

Two steam outlets give even steam distribution across a large room.

SOS Emergency Alarm

A commercial SOS emergency alarm for added safety in a business setting.

6 Chromotherapy LED Lights

Fully waterproof colour-changing LEDs with fixed or scrolling modes and a memory function.

Automatic Water Management & Protection

Auto-fill, automatic water top-up during use and auto-drain, plus overheat and low-water-level protection.

What's Included?

The Full 18kW Commercial Starter Experience—Engineered With Everything You Need

Insignia Signature 18kW Steam Generator (stainless steel)

6 colour-changing (chromotherapy) LED lights

Water-Treatment Cartridge (scale reducer)

Stainless-Steel Steam Nozzle / outlet

Commercial Fast "Mode" Button

Aluminium Alloy Square Caution Sign

Step-By-Step Instructions

From Order to First Steam Session in 6 Steps

Size Your Steam Room

Confirm your room volume (this 18kW unit suits ~16–22 m³ — the largest in the range). For smaller rooms the 15kW (13–18 m³) may suit better.

Confirm Specification & Order

Check you have (or can install) a 3-phase 380–415V supply and a cold-water feed and drain near the generator location, then order.

Prepare the Services

A qualified electrician runs the 3-phase supply (with RCD and isolator); a plumber provides the cold-water feed and drain. The generator sits in a dry, ventilated plant area within pipe reach of the room.

Delivery

Your set is delivered two-man kerbside (free UK delivery). Check the contents on arrival and report any transit damage immediately.

Installation & Commissioning

The generator is plumbed and wired (two steam outlets), the LEDs and control panel fitted, and the system commissioned. Professional installation is available, or use your own qualified trades.

First Steam

Set the commercial mode, temperature and time on the touch panel. Display the caution sign and follow the Safety & Usage guidance.

Build Overview

Technical Specifcations

SpecificationDetails
ModelInsignia Signature 18kW Commercial Steam Generator Set — Starter Collection (SKU T18C0M-A)
ManufacturerInsignia
TypeCommercial electric steam generator (steam-room boiler + starter kit)
Power Output18 kW (the range's most powerful)
Electrical Supply3-phase 380–415 V only (50/60 Hz) — cannot run single-phase
Rated Current27.3 A (3-phase)
Heating Elements9 × 2 kW (Sectional Heating Technology)
Circuit / Breaker25 A (per Insignia; installer to confirm protective device to BS 7671); RCD required
Cable (minimum)Live/neutral ≥ 4.0 mm², earth ≥ 2.5 mm² (5-core; Insignia's 18 kW power wire is 5 × 4 mm²) — electrician to size to load and BS 7671
Suitable Room Volume16–22 m³ (see sizing guidance)
Generator Dimensions510 × 185 × 460 mm (L × W × H)
ConstructionStainless steel (inside and out)
ControlWaterproof digital touch panel; commercial fast-steam mode; SOS emergency alarm
Lighting6 colour-changing (chromotherapy) LED lights
Water SupplyCold feed only, ½" via treatment cartridge + flexible stainless hose; max ~8 bar (fit PRV if higher)
Drain¾" copper/stainless to waste, downward gradient (water > 100 °C)
Steam OutletsTwo ¾" outlets; copper/stainless steam pipe only (never plastic); do not cross the pipes; short runs, minimal bends
Water ManagementAuto-fill, auto top-up, auto-drain; overheat & low-water protection
DeliveryTwo-man kerbside (free UK delivery); installation available or own fitter
Warranty12 months; upgrades to 2 years with an approved water processor (see Warranty)

Technical Notes

Frequently Asked Questions

Is the 18kW steam generator single-phase or 3-phase?
What size steam room does an 18kW generator suit?
Why does the 18kW have two steam outlets?
What's included in the Commercial Starter set?
What does stepping up to Premium or Platinum add?
Can my own contractor install it?
What warranty does it carry?
Is a steam room safe — who shouldn't use one?

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