Narvi Ultra Big Large Commercial Electric Sauna Heater Narvi Ultra Big 33kW Commercial Electric Sauna Heater / C-2003 controller unit / 6 x 20kg Premium Vulcanite Sauna Stones Electric Sauna Heater Finnmark Sauna
Narvi Ultra Big Large Commercial Electric Sauna Heater  Electric Sauna Heater Finnmark Sauna
Narvi Ultra Big Large Commercial Electric Sauna Heater  Electric Sauna Heater Finnmark Sauna
Narvi Ultra Big Large Commercial Electric Sauna Heater  Electric Sauna Heater Finnmark Sauna
Narvi Ultra Big Large Commercial Electric Sauna Heater  Electric Sauna Heater Finnmark Sauna

Narvi Ultra Big Large Commercial Electric Sauna Heater

£ 1,929.00 GBP
3 people are viewing this item right now
Model: Narvi Ultra Big 18 kW Commercial Electric Sauna Heater
Controller: None
Stones: None

Learn more about finance
Product description

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 together with the heater at a discount and is also sold separately. The Narvi Ultra Big Power Supply Unit is to 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.

Shipping & Return

For shipping prices please see our Shipping terms page.


We hope that you will be happy with everything you purchase from Finnmark. If you are not happy with your purchase, please get in touch with our customer service team and return your product with proof of purchase to:

Finnmark Returns, Unit 44 Enterprise City, Meadowfield Avenue, Spennymoor, DL16 6JF

- Within 30 days from the date of purchase or receipt of the product, whichever is the latest date.

Please read the sections below for more information:


Damage Reporting

Any damages or quality issues must be clearly written on delivery notes and the damages must be reported to Finnmark Limited within 24 hours of the delivery. No claims for damages or quality issues will be accepted if delivery notes are not signed for as damaged. 

Goods must be checked on delivery. Any quality issues, shortages in quantity or missing items must be written on delivery notes and reported to Finnmark Limited within 24 hours of delivery. No claims for quality issues, shortages or missing items will be accepted if delivery notes are not signed for as short.

Goods where damage is identified at the point of delivery can be refused by the customer and will be rerouted to us. On receipt of the goods, we can provide a refund or replacement.

Faulty Products

You will be required to undertake troubleshooting to establish the issue. You may be asked to provide photos and videos which will be required to diagnose the issues.

If your product develops a fault, this will likely be covered by the manufacturer's warranty. These differ from product to product and the warranty/guarantee information can be found in the relevant section on the product page. To discuss a manufacturers warranty claim, please contact our Customer Services team. They will require photo and video evidence to help submit your claim in order to resolve the issue. In some cases this may warrant a replacement part for repair or full exchange to replace the goods in accordance with the terms of the Consumer Rights Act 2015. This does not affect your statutory rights. The appropriate response will be established by our customer services team and their decision on the appropriate action is final.

Please note, on any of our sauna timber products, no manufacturer's warranty or guarantee is offered. The manufacturers do warrant the timber grading standards in line with the European or Canadian timber grading standards.


Right to cancel online orders

Under the Consumer Contracts Regulations 2013 you have the right to cancel your order, at any time up to 14 calendar days after the day on which you receive your delivery with the exception of any bespoke or made to order items, if unsure if the item is bespoke, please contact our sales team on:

The Customer must first contact us to let us know that you wish to cancel the order. 

In the event that the goods have been received before an order is cancelled the products must be returned to the point of dispatch at the customer's own cost and risk. 

The goods must not be unpacked and be sent back in the same condition as they were received. Once Finnmark Limited has been informed of the customer's intention to return products, the goods must be received at the point of dispatch within 7 days.

All items must be returned along with their original packaging and with sufficient protection to avoid damage occurring in transit. The customer is wholly responsible for the goods in transit and any damage. Goods must be sent by secure carrier and signed for.

In the event that the goods were sent directly from a supplier, the return must be made to the dispatch depot. All supplier fulfilled return charges, including re-stocking charges, handling charges and haulage charges must be paid in full by the customer. Each manufacturer has specific return policies, including non-return policies, which will apply to the customers’ orders.

If the customer believes an order or part of an order to be faulty, please do not return the item before contacting our sales team to explain the problem. With regards to a fault, no full or part refunds or replacements can be issued without first establishing with Finnmark Limited and the manufacturer that the fault lies with the product, in line with the Faulty Products section above.


Receiving your refund

We will issue all refunds using your original payment method. If you originally paid for a product by debit or credit card, a refund will be issued to the same card used for payment.

Things to note:

  • Unfortunately, we can’t return or exchange:
    • Made to measure goods
    • Bespoke fabricated goods
    • Design Services and Design Fees
    • Gift cards
    • Perishable items
    • Out of date products
    • Products that were marked as non-returnable when you bought them
    • Sale or Clearance Items
    • Shipping costs of items that have been collected/dispatched.


Once goods have been received by Finnmark Limited, it will be inspected to ensure no transit damage and check the goods are in a resalable condition, refunds will be processed within 7 days. Refunds on goods returned directly to manufacturers are subject to longer processing periods. Only once Finnmark Limited have received confirmation of the refund from the supplier the refund will be processed and any manufacturer's charges deducted.

Delivery fees and charges will not be refunded.


Processing of Refunds

Once received and the return successfully passes inspection your refund will appear in your account in 3-5 days.

Your refund can take up to 14 days to appear in your account.