Firzone FZ-100 Oxyplus Portable Infrared Sauna review
A head-out infrared box from a UK specialist.
Key facts
- Heat
- 65°C
- Infrared, 35–65°C
- Set-up
- 5 minutes
- 1 person, head out
- Power
- 900 W
- Brand’s rated power
- 30-min session
- 12p
- At 26.32p per kWh
Our rating: 8.1 out of 10
Weighted: heat 30%, comfort 20%, build 20%, ease of use 15%, value 15%. How we choose
- Heat
- 7.8
- Comfort
- 8.0
- Build
- 8.4
- Ease of use
- 8.4
- Value
- 8.0
What you get
A folding, head-out infrared sauna box from a long-running UK infrared brand. Your head stays outside, which many people find more comfortable, and it heats to 65°C on 900 W. It folds to 13 cm thick and weighs 10 kg.
It takes about 5 minutes to set up and fits 1 person, head out. Head stays out: easier to breathe, and no steam, no damp. On the downside: head-out design feels less like a sauna.
The heat
Infrared panels warm your body directly rather than heating the air, so it feels gentler than steam even at a similar temperature. Your head stays outside the box, which many people find easier, and there is no condensation to deal with.
Running costs
The Firzone Oxyplus is rated at 900 W. Running at full power for 30 minutes uses 0.45 kWh, which is 12p a session at 26.32p per kWh (Ofgem price cap, Oct to Dec 2026), or about £19 a year at three sessions a week. It will usually cost less, because the heater cycles on and off once it is hot. Work out your own cost.
Buy it if
You want dry infrared heat and to keep your head out.
Skip it if
You want a full-body sauna feel.
Specs
| Type | Head-out infrared box |
|---|---|
| Power | 900 W, 230 V |
| Heat | 35–65°C |
| Timer | 1–60 minutes |
| In use | 97 × 70 × 80 cm |
| Weight | 10 kg |