Harvia R-991 Sauna Heater Stones, Rounded Olivine, 5-10cm, 33lbs

Harvia SKU: R-991

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Regular price $73.00
Sale price $73.00 Regular price
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Regular price $73.00
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Product Information

The Harvia R‑991 comprises premium rounded sauna stones made from olivine diabase, sized 5–10 cm and totaling 15 kg (33 lb). These smooth, river‑rock‑inspired stones optimize steam delivery by allowing water to flow deeper, producing softer, fuller löyly.

Choose these stones for a gentle, natural sauna experience that enhances heat distribution and steam quality.

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Product Features

Masterfully crafted from olivine diabase, these rounded stones create soft, mellow steam and improved heat circulation.

Compatible with all sauna heaters, they encourage proper airflow and longevity when stacked loosely. Paired with angular stones, they deliver optimal heat retention and a soothing sauna atmosphere.

Rubber Dumbbell
Rounded olivine diabase
Rubber Dumbbell
Soft steam delivery
Rubber Dumbbell
15 kg (33 lb) size
Multiple Weights
5–10 cm diameter
Metal Handles
Loose stack airflow
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Harvia R-991 Sauna Heater Stones, Rounded Olivine, 5-10cm, 33lbs

Natural Olivine Diabase:
Durable stone from Finnish rock, selected for purity and safe sauna use.

Rounded Shape Design:
Smooth stones allow water flow deep into layers, boosting steam quality.

Soft Steam Ideal:
Water cascades gently to lower layers, creating a mellow, relaxing löyly.

Encourages Air Circulation:
Loose stacking increases airflow, improving heater efficiency and lifespan.

Pair with Angular Stones:
Best used atop angular stones to enhance bottom-layer heating and steam density.

Universal Compatibility:
Compatible with all electric and wood-burning sauna heaters.

Additional Features

Enhances sauna ambiance with gentle steam, efficient heat spread, and energy-friendly design using natural, smooth stones.

Iron Construction

Natural Composition

Made from pure olivine diabase for safe, clean sauna use.

Compact Design

Universal Heater Fit

Works with any electric or wood-fired sauna heater.

Hex Shape Design

Improved Airflow

Loose stacking ensures optimal heater performance.

Secure System

Gentle Steam Quality

Rounded texture produces soft, enveloping löyly.

About Harvia

Harvia is a globally recognized Finnish brand known for its premium sauna heaters, control systems, and wellness solutions.

Founded in 1950, Harvia blends traditional sauna culture with modern technology, offering reliable, high-performance products.

Renowned for durability, efficiency, and elegant design, Harvia continues to lead the industry in crafting exceptional sauna experiences for homes and commercial spaces worldwide.

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Specifications

Brand Harvia
Model / SKU R‑991
Stone Material Olivine diabase
Shape Rounded stones
Diameter 5–10 cm (2–4″)
Weight per Box 15 kg (33 lb)

Warranty & Returns

Return Policy

To request a return or refund, customers can use our contact form, email , or phone - . Once the product is inspected and confirmed to be in brand new condition, we will initiate the refund, which typically takes 5-7 business days to post back to the original payment method. Refunds can be applied via the customer’s preferred method, including card or bank transfer. Shipping instructions and the return address will be provided upon contacting customer service. Please include photos if the product arrives damaged. to view our complete return policy for more details.

Shipping Policy

Customers may contact us by phone or email anytime to inquire about the status of their order. While we may not always have a tracking link available before the order ships, we are happy to check its current status for you. If an item is never received, please contact us immediately. We will promptly file a claim on your behalf and ship a replacement to ensure you receive your product as soon as possible. to view our complete Shipping policy for more details.

Frequently Asked Questions

Can I use these with wood‑burning heaters?
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Yes, R‑991 stones are compatible with both electric and wood‑burning heaters—basically any traditional sauna heater.


How should I stack these stones?
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Place R‑991 rounded stones loosely on top of angular stones to ensure airflow and deep water penetration.


How often should I replace them?
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Inspect yearly; replace if cracked or crumbly—typically every 1–2 years depending on use.


Do rounded stones create less steam?
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No—rounded stones produce softer steam. Pairing with angular stones maintains strong steam density.


Is this safe for steam inhalation?
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Yes, Harvia selects clean olivine diabase stones tested for safe sauna use—no harmful substances.


What’s the box weight?
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The box weighs approximately 15 kg (33 lb), suitable for standard sauna heater refill.


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