Narvi Peak Big Commercial Electric Sauna Heater

About this Narvi Electric Sauna Heater 

*Stones, thermo pine heater guard & controller to be purchased separately* 

This heater requires up to 180kg of sauna stones. We recommend using a mix of the 5-10cm (60kg) and 10-15cm (120kg) Olivine Diabase or Vulcanite Sauna Stones for optimal performance.

The Narvi Peak Big offers a top-class spa experience for large commercial settings. Narvi Peak Big commercial electric sauna heater is Finnish- made with a captivating appearance and large capacity for stones. Thanks to its oval shape and feet, the heater can be easily placed into the sauna to complement different designs.  

The heater is designed to last in demanding conditions, making it an excellent choice for health clubs, spas and gyms.  

A thermo-pine heater guard has been specifically designed for the Narvi Peak Big, which can be purchased separately here.  

Controller 

The heating and timing are controlled by a separate control panel. Additionally, there is a separate power and thermostat unit, which make sure that the desired temperature is achieved and maintained over a continuous time period.  

Required control and power units: 

• Control unit C-2003, suitable for heaters between 18kW-33kW 
• Power Unit F-2003, 18kW-33kW  

You can find the control and power units by clicking here. 

This heater should be fitted by a qualified electrician and can be installed on three phase power supplies. Please see the installation manual under the "Downloadable Files" tab above. 

Correct connection of your Narvi electrical sauna heater in the UK - 

*Installation and maintenance must be done by a certified electrician

*Electricity supply must be isolated and/or switched off from the fuse panel prior to any installation or servicing work

*In accordance with European standard IEC 60364-7-703 part 703.412.5 an electrical sauna heater does not have to be connected through a Residual Current Device (RCD). This is also in accordance with BS7671:2018 part 703.411.3.3.

*For reliable operation, Narvi strongly recommends that the power supply should not be connected through a Residual Current Device (RCD)

*Other electrical devices in a sauna room should be connected through a Residual Current Device (RCD)

*The power supply cable must comply with BS7671:2018

*The instruction manual of the product and local electrical regulations must be followed

To learn more about installing electrical heaters on domestic power supplies, see our "How to choose the right electric sauna heater" page.

Product Specification

* The Peak Big 27kW has uneven power groups (15 kW & 12 kW), requiring a different cable cross-section for each group.

** Minimum distances to combustible materials.

Warranty

The warranty on this Narvi Sauna Heater is 2 years. The heating elements have a 6-month warranty.

About Narvi Oy

Browse our wider Narvi sauna heater collection.

Product Disclaimers

All Narvi 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 labelled in Finland. Watch out for these symbols as a mark of an authentic, Finnish-made, safe, quality product:

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 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 or misuse of your sauna heater. Please Contact Us if you require information on our recommended fitters.

Please note: All of our Narvi commercial electric heaters above 12kW are made to order, so once you receive an order confirmation from us, Narvi will start to custom-produce your heater(s) for you in Finland, and your order cannot be cancelled or returned any longer. We suggest that you make sure your design specifications and all necessary electrical and wood-burning provisions are finalised and confirmed with your designers, architect, engineers and electricians before placing your order with us.

Christmas and New Year's Shipping Update (Updated 2nd December 2025)

Please note the following changes to our pallet shipping and DPD delivery service on parcel orders over the Christmas period.

Our warehouse is fully closed for operation over the following days: Wednesday 24 December, Thursday 25 December, Friday 26 December, Wednesday 31 December and Thursday 1 January.

Orders requiring a pallet

The last dispatch date for orders requiring a pallet is Friday 19th December 2025. Pallet orders dispatched on this day must be booked and signed for with one of our sales team in advance.

Please note:

• Pallets dispatched on 19th December will be delivered on either 22nd or 23rd December, depending on your postcode
• We strongly advise against booking deliveries to the Highlands or Channel Islands close to the 19th December, as these may be held at the hub over the festive period
• There may be limited availability for pallet shipping on this day and we cannot guarantee that available slots remain

We will commence our regular pallet shipping service on Monday 5th January 2026.

If you have any questions about your pallet order, please get in touch with our Sales team: +44 (0) 20 8050 2895 or email info@finnmarksauna.com

Small Parcel Orders

DPD will deliver as normal up to and including Tuesday 23rd December 2025. Our daily cut-off for next day delivery is 2pm, with orders placed by 3pm on Tuesday 23rd December being our final dispatch before Christmas. Whilst we use a DPD Next Day delivery service, this is not a guarantee - please order earlier to avoid disappointment.

Limited dispatch service: We will dispatch DPD orders on Monday 29th December and Tuesday 30th December only during the festive closure period.

We will commence our regular delivery service on Monday 5th January 2026.

*Estimated delivery times are applicable to the UK mainland only (excludes Highlands and Islands). Additional delays and charges will be required for Non-UK Mainland and Highlands and Islands deliveries.