The Well Vetted

Cost to own: every heater control

What every heater control costs to buy and to use, on one axis, with the delivered price separated from the sticker.

How we vet

Affiliate disclosure

Delivered price runs $20 to $2,295 and cost per session $0.13 to $14.71 across the 37 heater controls.

Cost to own across every heater control
Heater controlsDelivered priceCost per session
Harvia WX254 2.5Ah FUSE$20$0.13
Harvia WX205 40mA FUSE$20$0.13
Harvia ZSME-80 Wall mounting flange for control panel$22.50$0.14
Harvia WX312 MULTIDRIVE CABLE 1.5m/4.9ft$25$0.16
Harvia ZSS-610 Water Solenoid Valve$47.50$0.30
Harvia WX248 Temperature Sensor$49.75$0.32
Harvia ZSK-778 Contactor 30A, Controls & HTR$153.50$0.98
Harvia ZSK-762 Thermostat for KIP/KV/Cilindro Heaters$175.50$1.13
Harvia WX325 XENIO HUMIDITY SENSOR$215.33$1.38
Harvia WX387 Xenio Control Panel$415.25$2.66
Harvia WX384 Xenio Control Panel$415.25$2.66
Harvia WX361 CIRCUIT BOARD CX30/CX45/CX170$419.50$2.69
Harvia Xenio WiFi Remote Control$477$3.06
Harvia Power Extension Unit LTY45 U1-U3$600$3.85
Harvia Fenix FX001XW WiFi Remote Control$666$4.27
HUUM UKU Local Sauna Control Unit$859$5.51
Harvia Xenio CX30 Digital Control for Cilindro, Club and Virta Series Heaters up to 10.5kW$973$6.24
Harvia Xenio CX170 Digital Control for Harvia KIP Sauna Heaters of 208V/3PH$1,035$6.63
Harvia Xenio Combi U3 Digital Control for Harvia Sauna Heaters$1,035$6.63
Harvia Xenio CX170 Digital Control for Harvia Sauna Heaters$1,035$6.63
HUUM UKU Sauna Control$1,062$6.81
HUUM UKU Wood Local Sauna Control Unit$1,088$6.97
Harvia Fenix FX30-U1-U3-XC Digital Control with WiFi$1,168$7.49
Harvia Xenio CX30C-U1 WiFi - Digital Control with WiFi for for Combi Single Phase Heaters$1,183$7.58
Harvia Xenio CX30C-U1 for Virta Combi Single Phase Sauna Heaters$1,183$7.58
HUUM UKU WiFi Sauna Control Unit$1,277$8.19
Harvia Xenio CX45 Digital Control for Harvia Cilindro, Club and Virta Series Heaters up to 17kW$1,292$8.28
Saunum AirIQ Wi-Fi: Programmable Multi-Function Wi-Fi Sauna Heater Control, 12kW$1,295$8.30
Harvia Fenix FX30C-U3-XC Digital Control with WiFi$1,420$9.10
Harvia Fenix FX30C-U1-XC Digital Control with WiFi$1,420$9.10
Harvia Fenix FX45-U1-U3-XC Digital Control with WiFi$1,551$9.94
HUUM UKU Glass WiFi Sauna Control Unit$1,774$11.37
Saunum Airsolo Wall, In-Wall Sauna Temp & Steam Equalizer, Adjustable Height$1,895$12.15
Saunum Airsolo 70, Sauna Temperature and Steam Equalizer 70"$2,195$14.07
HUUM UKU Gold$2,247$14.40
HUUM UKU Mirror WiFi Sauna Control Unit$2,247$14.40
Saunum AirSolo 80, Sauna Temperature and Steam Equalizer 80"$2,295$14.71

How these are worked out

Delivered price is the record price plus a heater where one is sold separately, so a cabin that arrives without its heater is not compared against one that arrives with it. Cost per session divides the delivered price across the session assumptions stated below. Both derive from the record; neither is typed by hand.

Assumptions: electricity at $0.17 per kWh (US average), cost per session over 3 years at about 1 session per week (price divided by 156), sauna running cost at a 30-minute session. These are estimates for comparison, not quotes.

Records on this page last verified August 26, 2026.

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