Saunum AIR 5 Sauna Heater with Climate Equalizing Fan (240 V)

1. Heat & steam 25% of the rating 4 of 5

   A 4.95 kW heater with 110 to 130 lb of stones for 106 to 212 ft³ that takes water on the stones; its fan evens out the temperature, but the manual limits use to 140 to 194 °F and cuts the fan out above 176 °F at the height of the device’s lower part.

2. Build 15% of the rating 3 of 5

   The body material and finish are not stated, and the heater adds a fan, electronics and an optional salt tray in the hot room, which a plain stone heater does not have.

3. Safety listing 25% of the rating 4 of 5

   UL certificates to UL 875 and to CSA C22.2 No. 164 name the AIR 5, but Saunum hosts the copy we read and we could not open UL’s directory; the manual forbids connecting it through a GFCI breaker.

4. Durability 20% of the rating 2 of 5

   A 2-year warranty that excludes labor, the heating elements and the salt spheres, requires an electrician’s installation report and repairs only by Saunum’s recommended partners.

5. Value 15% of the rating 2 of 5

   About $4,410 for the heater, the AirIQ control it needs and stones (the heater alone is $2,895), for rooms of 106 to 212 ft³, the smallest range of the heaters here and the highest working price.

The rating, 3.2 of 5, is the weighted average of these scores. See how we rank sauna heaters and our standard.

• Haven of Heat (retailer) (opens in a new tab) approx. $4,410 with the AirIQ Wi-Fi control and stones ($2,895 for the heater alone). The 5 kW package, open or closed basket at the same price. The heater alone is a separate page. Its text lists a 104 to 212 °F adjustment range, wider than the 140 to 194 °F in the manual.
• SaunaHeaters.com (retailer) (opens in a new tab) approx. $4,410 with the AirIQ Wi-Fi control and stones ($2,895 for the heater alone). Open-basket package (a closed-basket package is also $4,410). The heater alone is a separate page.
• SaunaKits.com (retailer) (opens in a new tab) approx. $4,410 with the AirIQ Wi-Fi control and stones ($2,995 for the heater alone). The package with the stainless open basket; the black closed-basket package is $4,510. Its page lists a 2-year consumer warranty.

Prices as we saw them on October 23, 2026. They change often. These links carry no tracking code and earn us nothing.

1. Heater body in black (the material and finish are not stated)
2. Built-in fan that mixes hot air from near the ceiling with cooler air from the floor, with a thermal cutoff
3. Open or closed stone basket holding 110 to 130 lb of stones
4. Seven Himalayan salt spheres included in a tray (optional)
5. A control: the manual says the heater is designed to work only with Saunum’s AirIQ control system, which Saunum US sells separately as a Wi-Fi control ($1,295) in app, panel or in-sauna versions

• Paid certification UL (certificates issued to Saunum Saunas North America OÜ) May 2023

  Certificate UL-US-2310119-2 (UL 875, 9th edition) and UL-CA-2308849-2 (CSA C22.2 No. 164-18), report E525245-20230309, dated 2023-05-11, name Saunum AIR 5, AIR 7 and AIR 10 as permanently installed wall-mounted sauna heaters. The certificates say they do not themselves authorize the UL Mark, so check the label on the unit. Saunum hosts the PDF; we could not open UL’s online directory. Open ↗ (opens in a new tab)

What does the heater cost with everything it needs?

Saunum’s US store lists the 5 kW heater at $2,895 with an open basket ($2,995 closed). The manual says it works only with Saunum’s AirIQ control, which the same store lists at $1,295. Haven of Heat and SaunaHeaters sell the heater, control and stones for $4,410, and SaunaKits for $4,410 (stainless open basket) or $4,510 (black closed basket).

Does the fan limit how hot the sauna can get?

The manual (opens in a new tab) says to use the heater with the fan in a room at 140 to 194 °F, and that if the air at the height of the lower part of the device passes 176 °F the thermal protection stops the fan. It tells you to leave the fan off during the first heat-up. People who like a sauna at 90 to 100 °C should read this first.

Do the Himalayan salt spheres do anything?

Saunum’s page says the salt spheres “infuse healthful ions”. A PubMed search for Himalayan salt with sauna, inhalation or lamp returned no studies on 2026-10-23. The manual says the salt is optional, that Saunum is not responsible for side effects of salt treatment or for salt corrosion of equipment, and that third-party spheres void the warranty.

What does the warranty really cover?

Two years in a private sauna. The manual excludes labor, the heating elements and the salt spheres, requires an installation report from a qualified electrician and repairs only by Saunum’s recommended partners.

Can it go on a GFCI circuit?

No. The manual says “Do not connect the heater to the power and/or utilities via a GFCI breaker!” It also warns that excessive humidity may cause electrical components to fail, so ventilation matters.

• UL certificates to UL 875 and to CSA C22.2 No. 164 name the AIR 5, with the report number and date.
• It still takes water on the stones: the manual says to ladle about 6 to 7 fl oz at once, with the fan mixing the steam through the room.
• The manual is thorough: clearances, circuit and wire sizes, the fan limits, the GFCI warning and the warranty terms are all stated.

• The fan stops if the air at the height of the device’s lower part passes 176 °F, and the manual rates the device to 194 °F.
• The warranty is two years and excludes labor, elements and salt spheres. Repairs go through Saunum’s partners.
• The salt “healthful ions” claim has no study behind it, and the manual disclaims salt corrosion and side effects.
• The AirIQ control the heater needs is sold separately, $1,295 at Saunum US, so a working set with stones is about $4,410 at three dealers. The 5 kW size covers only 106 to 212 ft³.

Third-party tested

Yes

Tested by

UL (certificates for Saunum AIR 5, 7 and 10)

1. Saunum AIR: maker’s US product page. Maker’s page. Prices, options and the salt claim, seen 2026-10-23. The store data gives $2,895 (open basket) and $2,995 (closed basket). Open ↗ (opens in a new tab)
2. Saunum US: control devices (AirIQ Wi-Fi). Maker’s page. The control the heater needs; the store data lists it at $1,295, read 2026-10-23. Open ↗ (opens in a new tab)
3. Haven of Heat: Saunum Air package with Wi-Fi control and stones. Independent source. 5 kW package $4,410 (open or closed basket); heater alone $2,895. Open ↗ (opens in a new tab)
4. SaunaHeaters.com: Saunum Air 5 kW open-basket package. Independent source. $4,410 with control and stones; heater alone $2,895. Open ↗ (opens in a new tab)
5. SaunaKits.com: Saunum AIR 5 SSB package. Independent source. $4,410 with control and stones ($4,510 for the black closed-basket package); heater alone $2,995. Open ↗ (opens in a new tab)
6. Saunum AIR installation and operation manual (PDF, US). Maker’s page. Power table, room sizes, stone weights, 140 to 194 °F, fan cutoff, GFCI warning and warranty. Open ↗ (opens in a new tab)
7. Saunum AIR UL certificates of compliance (PDF). Certifier or regulator listing. UL-US-2310119-2 and UL-CA-2308849-2, hosted by Saunum. Open ↗ (opens in a new tab)
8. US Consumer Product Safety Commission: recalls with “sauna” in the title. Certifier or regulator listing. Open ↗ (opens in a new tab)
9. California Attorney General: Prop 65 60-day notice search. Certifier or regulator listing. No notice names Saunum (searched 2026-10-23). Open ↗ (opens in a new tab)

• Harvia Cilindro PC90 Floor-standing, 200 lb of stones, built-in dials, one-year guarantee in its manual. About $1,920 with stones.
• HUUM DROP 6 kW Stainless steel, 121 lb of stones, an SGS certificate and a 3-year warranty in HUUM’s terms. About $3,441 as a package.

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