Indoor · 1 person
- Width × depth × height
- 80 × 90 × 170 cm
- Footprint
- 0.72 m²
- Heat and light
- 7 emitters · 1 red light panel
- Supply
- 110–120 V
Recovery
A recovery zone is the quiet half of a home gym: an infrared sauna from the ITERA Ember 100 line, the Cold Plunge ITERA Zero and somewhere to sit between them. It is planned like a bathroom, not like a weight room.
Water changes the brief. The floor has to drain and stay safe underfoot, the structure has to carry a filled tub, and the electrical supply has to be protected. These are decisions for the people who build the house, taken before any equipment arrives.
| Type | Temperature | How it works |
|---|---|---|
| Traditional sauna | 80–100 °C | Dry ambient heat |
| Infrared sauna | 45–60 °C typical; ITERA Ember 100 up to 65 °C | Heats the body directly at a lower air temperature |
The choice affects the room: a traditional sauna asks for more power and ventilation; an infrared cabin is easier to place indoors.
Begin with sessions of 5 to 10 minutes and drink water. Build up slowly. Heat and cold are real stress on the body, so speak with a health professional before you start, particularly with any heart or blood-pressure condition.
The line
ITERA Ember 100 is the infrared sauna line from Doer Fitness. Each cabin combines quartz and carbon infrared emitters with a floor panel, and adds red light panels in the ceiling at 660 nm and 850 nm. The cabins reach a maximum of 65 °C and are ready in 10 to 15 minutes.
The structure is Canadian hemlock with an 8 mm tempered glass door. Indoor cabins arrive in modular boxes and are assembled on site; the outdoor model adds a black aluminium shell. Time and temperature are set from a digital panel or over WiFi.
Catalogue images from Doer Fitness. Dimensions and electrical data as published in each product sheet; the electrical installation is defined by a certified electrician. This page describes the technology and makes no health claims: speak with a health professional before using heat or light therapy.
Cold and heat in one unit

The Cold Plunge ITERA Zero is the cold immersion tub from Doer Fitness. The ITERA Zero line cools and heats in a single unit, across a range of 3 °C to 20 °C, with filtration, ozone and insulation built into the body.
Going from 20 °C down to 3 °C takes about 3.5 hours with 300 L of water. That figure varies with the ambient temperature and the installation. Temperature is set on an LED touch screen or scheduled and monitored from a mobile app.
For a plan, what matters is what it asks of the room: clear air in front of it, a slab that carries the water, and a route to bring it in. We settle those in the layout before anything arrives.
Data from the Cold Plunge ITERA Zero technical data sheet from Doer Fitness. Cooling performance varies with the ambient temperature and the installation. This page describes the equipment and makes no health claims: speak with a health professional before using cold immersion.

Other equipment
Some rooms are planned for two further categories of equipment. We name them here only for what they ask of the room.
A chamber is a large object that a person enters. It needs a clear footprint with room to open its door and to walk around it, a route wide enough to bring it in, a dedicated electrical supply defined by an electrician, ventilation in the room, and a floor that carries its weight.
Panels mount on a wall or a stand. They ask for a free wall, clear distance to stand or sit in front of them, a protected outlet close by, and a position that does not throw light across the rest of the room. The ITERA Ember 100 saunas already carry red light panels in the ceiling.
These are categories of equipment, described for space planning only. This page makes no health claims about them. Whether and how to use them is a decision to take with a health professional.
Start with 5 to 10 minutes, stay hydrated and build tolerance gradually. Ask a health professional first if you have any medical condition.
A traditional sauna heats the air to 80–100 °C with dry heat. An infrared sauna works at 45–60 °C and heats the body directly.
It is Doer Fitness's line of infrared saunas with red light panels in the ceiling. It comes in three indoor sizes, for 1, 2 and 4 people, and one outdoor model for 1 to 2 people.
It depends on the model. In the ITERA Ember 100 line, the 1 and 2 person indoor cabins run on 110–120 V; the 4 person and the outdoor model need a dedicated 220–240 V circuit. A certified electrician defines the installation.
According to its data sheet: 1 m clear at the front for ventilation, 20 cm clear on each side, a slab that carries the unit, the water and the user, and a clear route for its 1.95 m length. The unit measures 195 × 80 × 71 cm and runs on 110 V · 60 Hz; a certified electrician defines the connection.
The room can be planned for them: footprint, access, ventilation and power are settled on the drawing. Whether and how to use them is a decision to take with a health professional.
A floor that tolerates water and can carry the weight of a filled tub, drainage, a protected electrical supply and ventilation. Confirm each with a qualified professional.
The studio
Bring the measurements, the ceiling height and what you want to train. The Doer Fitness team turns them into a layout before a single piece of equipment is chosen.
Request a private consultation