Handcrafted in Estonia—where sauna culture runs deep—the Cozy Heat 18kW Thru-Wall Wood-Burning Sauna Stove is designed for efficient sauna spaces and dependable performance.

Wood-fired sauna stoves are valued for their mild, long-lasting heat and the ability to pour water over hot stones to generate smooth, satisfying steam. The Cozy Heat 18 TW model features a practical through-the-wall design, allowing firewood to be loaded from outside the sauna for a cleaner and more convenient setup.

Built for durability, the flame cutter—one of the most heat-exposed components—is made from 5 mm-thick stainless steel to withstand repeated high-temperature use. With its robust construction and thoughtful design, the Cozy Heat 18 TW delivers a classic wood-fired sauna experience with reliable heat and timeless appeal.

Important: Sauna stones are required for operation and are sold separately. Cozy Heat 18 TW requires 8 boxes of sauna stones.

Not sure if this is the right fit? This model is ideal for medium 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
• Minimal safety clearance requirements
• Mild and long-lasting heat
• Through-the-wall design for external firewood loading
• Floor mount
• 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