Handcrafted in Estonia—where sauna bathing is a way of life—the Cozy Heat O TW 18kW Wood-Burning Sauna Stove reflects durable construction and thoughtful design.

Built for longevity, the flame cutter—one of the most heat-intensive components—is made from 5 mm-thick stainless steel to withstand repeated high-temperature use. The stove is designed to deliver mild, long-lasting heat, allowing water to be poured over hot stones to create rich, satisfying steam.

The Cozy 18 O-TW features a practical through-the-wall design, enabling firewood to be loaded from outside the sauna for a cleaner interior experience. Its distinctive circular rim design enhances visual appeal while supporting even heat distribution throughout the sauna room.

Important: Sauna stones are required for operation and are sold separately. This stove requires 8 boxes of sauna stones.

Cozy Heat 18 O-TW is ideal for medium to large sauna rooms (317–635 cu. ft.).

Features

• Wood-burning
• Steel construction
• Smoke gases are 6x cleaner
• German BIMSCH certificate
• Uses 25%–40% less fuel than comparable sauna stoves
• Boasts minimal safety distances
• Mild and long-lasting heat
• Floor mount thru-wall
• Designed and engineered in Estonia
• 2-year warranty

Specifications

Installation Requirements

This stove is intended to be installed through a concrete or brick wall.

What's Included

• Outer frame of the heater
• Chimney pipe
• Heater body
• Cleaning hatch
• Heater door with glass
• Ash box
• Installation and operation manual
• 2-year warranty

Complete Your Setup

To install and operate this sauna heater properly, the following components are needed:

• Cozy Heat Traditional Split-Face Sauna Stones: 8 boxes
• Cozy Heat Premium Rounded Sauna Stones: 8 boxes

User Manuals