UK South +44 (0) 2080502895 | UK North +44 (0) 1768489273 |

Product Detail

Narvi Ultra Big Large Commercial Electric Sauna Heater

£ 1,851.00 GBP

Designed for large commercial saunas.

Product Description

The Narvi Ultra Big large commercial electric sauna heater is ideal electric heaters for large commercial saunas fitted in gyms, spas, hotels and wellness retreats. These heaters can also be fitted in large personal or group saunas. They are the perfect choice for demanding usage requirements, such as being active all day, every day. The Ultra Big is a truly unique, one-of-a-kind commercial heater. No other sauna heater on the market combines the authentic Finnish sauna experience that comes with such a large stone capacity, with such an outstanding build quality and durability. When it comes to heating large authentic commercial saunas, there is no better option that the Narvi Ultra Big.

The Ultra Big is a larger version of the Narvi Ultra and similarly is stainless steel inside and out, with some of the highest material thicknesses on the market. The elements have a market leading thickness and grade, making this the ideal heater for frequent use where water can and should be poured over the stones.

It is certainly true that there are sauna heaters and there are sauna heaters. This is also very much the case for commercial heaters. Most modern hidden/behind-the-bench heaters and commercial heaters simply act as a heater with no stones. This creates an unpleasant löyly and is nothing like the very relaxing and enjoyable experience of authentic Finnish sauna. Sadly however, this is the experience that many of the British public attribute to sauna from their brief encounter with their local health club. This heater will set your sauna apart from the competition by being one of the few truly authentic Finnish electric sauna heaters in the U.K.

The Ultra Big series combines Narvi's renowned build quality and longevity with their market leading stone capacity to provide a commercial heater that is simply like no other on the market. Show your customers what it means to relax and enjoy a true Finnish sauna, with a genuine Finish-made, Finnish-designed commercial sauna heater.

The sauna heater is controlled from a separate control panel that can be installed where required. 

Control panel C-2003 for use with the Narvi Ultra Big.

- Heater temperature control 40°C - 115°C (in 1°C steps)
- Temperature display 20°C - 125°C
- 14 memory locations for switch on time (2 times a day)
- The programmed switching-on time can be bypassed
- Switching-on time 6h, 12h, 18h or continuous time
- Control for sauna room lights
- External temperature sensor for sauna room
- Same timer as weekly timer, but two settings/day possible

There is also a thermostat unit, separate from the control panel that ensures that the sauna is kept at the desired temperature. The Ultra Big Control panel C-2003 can be purchased with together with the heater at a discount but is also sold separately. The Narvi Ultra Big Power Supply Unit must be purchased separately.

Product Specification

Model Ultra Big 18 kW Ultra Big 24 kW Ultra Big 30 kW Ultra Big 33 kW
Capacity of the sauna 18–30 m³ 27–40 m³ 40–56 m³ 46–66 m³
 Power 18 kW 24 kW 30 kW 33 kW
Measurements and weight
Height 68 cm 68 cm 68 cm 68 cm
Width 86 cm 86 cm 86 cm 86 cm
Depth 49 cm 49 cm 49 cm 49 cm
Heater weight / Amount of stones 57 kg / 120 kg 57 kg / 120 kg 57 kg / 120 kg 57 kg / 120 kg
Encasing stainless steel stainless steel stainless steel stainless steel
Safety distances*
To the sides 160 mm 160 mm 200 mm 200 mm
 In front 200 mm 200 mm 200 mm 200 mm
 Upwards 1400 mm 1400 mm 1500 mm 1500 mm

 * Safety distances are to combustible

About Narvi Oy

Product Disclaimers

All Narvi commercial sauna heaters are CE tested and bear the Finnish Key Flag Symbol. This is awarded to sauna heaters that are made and designed in Finland, where over 95% or more of the production must be within Finland itself. There are many brands that claim to be made in Finland but are actually made in the Far East or Russia and merely assembled or labeled in Finland. Watch out for these symbols as a mark of an authentic, Finnish-made, safe, quality product:

Finnish Key Flag and CE Marked

As part of Finnmark Sauna's Endurance Ethos, we only deal in products that are market leaders in quality. We commit ourselves to search exhaustively for the highest quality authentic Finnish sauna products.

Please note, we recommend that electric sauna heaters should be installed by a suitably qualified electrician/builder/fitter. Finnmark Limited accepts no liability for loss or injury caused by the incorrect installation of your sauna heater. Please Contact Us if you require information on our recommended fitters.

Purchasing & Delivery

Before You Buy

To avoid disappointment on day of delivery, be sure to measure the area you plan to place your new sauna equipment and compare this with measurements under the product specification tab, before placing your order. Please ensure you measure any doorways (height and width) through which any large sauna equipment must pass to get to its final position. Identify any delivery obstacles and check that the sauna equipment can clear any stairs, low ceilings, sharp corners or elevators. Please note, we use independent couriers to deliver all our products and thus we cannot confirm whether the courier is willing and able to help with delivery beyond the threshold of the property. Should you require any specialist delivery support, please contact us to discuss ahead of your purchase.


- Recorded Next Day Delivery* is available on all marked products for orders to the UK Mainland. The product will be marked as such within the product description ("Order before 2pm to guarantee next day delivery on this item") where this service is offered. The customer must order before 2pm to guarantee receipt of the product Next Day*. * Next Day Delivery guarantees next working day only, for orders within UK Mainland.

- All other products** are subject to 3-10 working days shipping time with tracked and recorded courier. Please note, some of our items are shipped direct from manufacturer. ** Excludes sauna cabins & installations.

- Sauna Cabin delivery times can vary considerably, especially those that are made to order. Please contact us for manufacturing and delivery time estimates for sauna cabins. Where installation for cabins and bespoke installations is requested, this will be completed in the next available time window which may be sometime after the delivery of goods. Please contact us to confirm delivery and installation requirements and timings.

- Expedited Delivery or installation services may be available upon request, but extra charges will apply.

Warranty Information

Manufacturers Warranty

A two year manufacturers warranty applies on all products commencing from the point of sale/purchase from Finnmark Ltd.

#1: What does this warranty cover?

The warranty covers it covers any defects in material and workmanship under normal use. A warranty claim cannot be made on domestic equipment being installed in a commercial environment.

#2: What will we do to correct problems?

In the rare case that a warranty claim is required, Finnmark Ltd provide replacements for any confirmed broken parts of a product. Where this is not possible, Finnmark may offer a replacement but the customer may be required to return the product to Finnmark Ltd or to the manufacturer, at the customers expense. The customer should follow the claims procedure laid out below.

#3: How long does the coverage last?

The manufacturers warranty covers all items purchased directly from Finnmark Ltd for 2 years commencing the point of sale/purchase by the customer.

#4: What does this warranty not cover?

The following are not covered by the manufacturers warranty:
- Theft or loss of the product.
- Usage of domestic equipment within a commercial environment.
- Damage of a product resulting from negligence.
- Damage of a product resulting from unauthorized modification of the product.
- Damage caused by natural disaster.
- Consequential and indirect damage caused.

#5: What do you have to do?

To make a warranty claim, the customer is required to:
- Provide all information required by Finnmark to assess the issue.
- Finnmark Ltd may request detailed photographs of the product. For example a heater may require photos of the elements, power supply and drivers to assess what may be required to fix the product.
- Finnmark Ltd will make a judgement based on this information as to what replacement parts may be needed or if the product needs to be returned and replaced.
- Where a replacement is granted, the customer must first return the initial product to Finnmark Ltd or may be required to be sent to the product manufacturer, this will be confirmed by Finnmark Ltd during the claims procedure. The return shall be at the expense of the customer and should be sent via a recorded courier service. Finnmark Ltd holds no liability for items lost or damaged in transit.

#6: Applicable Laws

All warranty claims are handled in accordance with the laws of the United Kingdom where Finnmark Ltd is based and registered.

Payment Information

We are currently able to accept the following payment methods:
- Credit & Debit Card (including Mastercard, Visa & American Express)
- Paypal
- Amazon Pay
- Bank Transfer