These traditional, high quality sauna stones are noted for their durability and excellent soft steam created when water is applied. These stones are can be fitted in any sauna heater. They are available in two sizes: 5-10 cm and 10-15 cm. In the case that heaters require both grades, larger stones should be used at the base with smaller grade stones added to the top of the heater. Each box comes with approximately 20 kg of premium Finnish olivine diabase sauna stones.
For both wood burning and electric sauna heaters, stones should be filled to the rim but not exceed it. Stones should be placed to maximise the space in between. This ensures a perfect loyly as the water can cascade easily down the length of the large heating capacity and allows air to flow between them with ease. Over time, even the highest quality diabase fractures. Depending on usage, stones should be replaced once every year to every two years. This is important to maintain the voids between stones remain large enough for the through flow of water and air, and because the heat capacity of the stones relates to the size of the stones themselves. A simple way to check yourself is to measure the stones in comparison to your closed fist, once stones become smaller than this, they should be replaced.
For information on how to correctly load the stones into your heater, see our helpful guide including video demonstrations available here.
The differing stone size requirements for each stove can be found below:
|Wood-burning Heaters||5-10 cm stones / kg||10-15cm stones / kg|
|KOTA LUOSTO & LUOSTO WATER TANK||35|
|KOTA KURU 14 & 14 WATER TANK||35|
|KOTA KURU 20||40|
|NARVI NC 16||50|
|NARVI NC 20 & 20 WATER TANK||60|
|NARVI NC 24||80|
|NARVI STEAM MASTER||100|
|AITO 16 & 16 WATER TANK||50|
|AITO 20 & 20 WATER TANK||60|
|AITO 24 & 24 WATER TANK||80|
|Electric Heaters||5-10 cm stones / kg||10-15cm stones / kg|
|NARVI VELVET ELECTRIC||140|
|NARVI STEAM READY||80|
|NARVI NC ELECTRIC||30|
Commercial Sauna Heaters
|5-10 cm stones / kg||10-15cm stones / kg|
|NARVI ULTRA BIG||120|
|NARVI ULTRA SMALL||30|
|NARVI STYLE PRO
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:
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.
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.