Why We Like It

The Smartmak 3–4 Person Hybrid Outdoor Sauna combines two different sauna experiences in one unit: full-spectrum infrared heating and a traditional Harvia sauna stove. Because the two systems can be used separately, owners have the flexibility to choose between infrared heat and a traditional higher-temperature sauna session.

We also like its combination of a relatively spacious interior, Canadian hemlock construction, ergonomic backrest, panoramic glass and smart controls—features that make it particularly well suited to a dedicated backyard wellness space.

Best For

Ideal for homeowners looking for a mid-size outdoor sauna with both infrared and traditional heating options.

With room for approximately three to four people, it provides more shared space than a compact two-person sauna without requiring the footprint of some of the larger six- to eight-person models.

Features Worth Considering

• Hybrid heating: Combines infrared heating with a traditional Harvia sauna stove; the two heating modes are designed to be used separately.
• Infrared system: Includes 8 full-spectrum infrared heaters plus 3 carbon infrared heaters, with 3500W listed total output.
• Traditional sauna heater: Includes a 4.5 kW Harvia sauna stove for a higher-temperature traditional sauna experience.
• Two temperature ranges: Manufacturer lists infrared operation up to approximately 149°F and traditional sauna operation up to approximately 195°F.
• Smart Wi-Fi control: Compatible functions can be controlled remotely using a smartphone.
• Bluetooth audio: Integrated audio provides entertainment during sauna sessions.
• Chromotherapy lighting: Includes 7-color interior lighting.
• Red-light feature: Provides an additional lighting option within the sauna.
• Canadian hemlock construction: Manufacturer specifies Canadian hemlock wood.
• Ergonomic backrest: Curved backrest provides additional seating support.
• Panoramic glass: Large glass area creates a more open interior environment.
• Ventilation: Integrated ventilation supports interior airflow.
• Air-purification feature: Includes an air purifier as an additional interior feature.

Things to Know Before Buying

The infrared and traditional sauna heating systems are designed to operate separately and should not be used simultaneously.

This is also a substantial outdoor product measuring approximately 71"W × 51"D × 84.7"H, so confirm the installation area, foundation or surface requirements, clearances and electrical requirements before purchasing.

The listing identifies a 3500W infrared system and 4.5 kW Harvia sauna stove, but the information provided does not specify the complete voltage, amperage or circuit requirements. Confirm the required electrical service before ordering or arranging installation.

Also pay particular attention to delivery: the seller states that the sauna is delivered by truck and unloaded at the roadside. Buyers should plan in advance for moving the packaged sauna from the delivery point to its final installation location.

Product specifications, included components, delivery terms, pricing and availability can change. Confirm the current Amazon listing details before purchasing.

Product Specifications

Brand: Smartmak
Model: SMT-043LHT
Part Number: HL-HySauna-03OLB
Capacity: 3–4 persons
Installation: Outdoor
Sauna Type: Hybrid — infrared and traditional sauna
Wood: Canadian hemlock
Product Dimensions: Approximately 71"W × 51"D × 84.7"H
Infrared Heating: 8 full-spectrum heaters plus 3 carbon infrared heaters
Infrared System Output: 3500W
Infrared Maximum Temperature: Approximately 149°F
Traditional Heater: Harvia 4.5 kW sauna stove
Traditional Maximum Temperature: Approximately 195°F
Heating Modes: Operate separately; not simultaneously
Smart Control: Wi-Fi
Audio: Bluetooth
Lighting: 7-color chromotherapy
Additional Lighting: Red-light feature
Additional Features: Ergonomic curved backrest, panoramic glass, ventilation and air purifier
Package Dimensions: 87.9" × 71.0" × 32.3"
Delivery: Truck delivery; seller states roadside unloading
Electrical Requirements: Verify voltage, amperage and dedicated-circuit requirements before purchase