Can You Convert a Traditional Sauna to Infrared (or Infrared to Traditional)?

You already have a sauna room — framed walls, insulated, finished with wood, a bench, a door. You've done the hard part. Converting from traditional to infrared doesn't require starting over — it requires swapping the heat source and upgrading the controls. Going the other way, from infrared to traditional, is a different story, covered below.

Why people convert

Comfort: Traditional saunas at 170-200°F are too intense for some users — elderly adults, children, people with respiratory sensitivity. Infrared at 130-150°F provides a meaningful core temperature elevation in a more comfortable environment. Energy: Traditional rock heaters use more electricity and require 30-45 minute warmup. Infrared panels need a shorter warmup (about 15-25 minutes) and use less power per session.

Health research: The Waon therapy and CFS studies used far-infrared specifically. Some users want the modality the research tested. Red light therapy: PBM LED panels can't survive in 180°F traditional sauna air — the electronics fail. Infrared's lower ambient temperature allows bench-integrated red light therapy at therapeutic wavelengths. Maintenance: No rocks to replace, no high-temp element to corrode, simpler long-term upkeep.

Assessment: is your sauna convertible?

Here's what to evaluate: Dimensions: Minimum 4'x4' interior for a comfortable single-person conversion. Larger is better — more wall space for heater panels. Wood condition: Is the wood structurally sound? Any rot, mold, or significant damage? Wood type: Cedar and hemlock are ideal. Spruce is a standard sauna wood and usually works too; resinous knots in pine or spruce can bleed a little sap when panels heat them, so check the knots near where panels will mount. Insulation: Is the room properly insulated? Traditional saunas should have insulation — verify it's intact. Electrical: What circuit currently feeds the traditional heater? Amperage, voltage, wire gauge. Ventilation: Is there adequate fresh air exchange?

Good candidates

• Solid wood construction: Cedar, hemlock, spruce, or basswood walls and ceiling. The wood should be solid boards — not veneer over plywood. If you're not sure, check the edge of a board: solid wood shows continuous grain through the full thickness.
• Good structural condition: No rot, no mold, no water damage to the wood or framing. Surface discoloration from years of heat is normal and cosmetic — structural rot is not.
• Flat wall surfaces: VantaWave panels mount to flat surfaces. Standard rectangular saunas are ideal.
• Adequate dimensions: Enough interior space for the panels and bench (see the minimum above). Larger spaces accommodate more heater panels and better coverage.
• Accessible electrical: Your existing electrical panel should be accessible for the circuit modification.

Poor candidates

• Barrel saunas: The curved walls don't provide flat mounting surfaces for heater panels. Some barrel conversions are possible with custom brackets, but the results are compromised.
• Plywood or particle board construction: If hidden areas (behind heaters, under benches) use engineered wood, conversion may not be advisable. Heating these materials causes formaldehyde off-gassing — see our guide on glues and adhesives in saunas.
• Extensive water or mold damage: If the wood is structurally compromised, a conversion won't fix the underlying problem. In these cases, a new custom build may be the better investment.
• Some outdoor saunas: If the insulation is inadequate or the structure isn't weather-sealed, the lower operating temperatures of infrared may not maintain comfortable cabin temperatures in cold climates.

The six-step conversion process

Step 1 — Assess and plan: SaunaCloud evaluates your existing space (photos + dimensions + electrical specs) and designs the infrared layout — heater panel placement, overhead panel position, control location, red light integration if desired.

Step 2 — Remove traditional heater: The rock heater, rocks, and associated high-temperature electrical connections are removed, and a licensed electrician disconnects and decommissions the heater's circuit so it can't be switched back on. Don't leave the rock heater in place as a backup: running it near infrared panels and their electronics exposes them to air temperatures they aren't rated for (as noted above, LED electronics fail in traditional sauna air). The existing wiring can often be reused for the infrared system — see Step 4.

Step 3 — Install VantaWave infrared panels: Carbon wall panels mount to existing walls. The overhead halogen panel installs above. Full-surround placement ensures uniform infrared coverage. Panel positioning is designed around the existing bench layout.

Step 4 — Electrical upgrade: Your licensed electrician adapts the existing circuit for the CORE 5 power supply. Traditional saunas typically run on 240V/30-50A dedicated circuits. If the new system runs at 240V, the existing wiring is usually adequate, but the breaker typically must be changed to match the new equipment's rated overcurrent protection. If it needs 120V or a neutral, new wiring may be required. Have your electrician confirm. SaunaCloud provides complete electrical specs.

Step 5 — Install control panel and power supply: CORE 5 mounts above/outside the sauna. Control panel installs at a convenient location inside or outside the sauna room. SaunaCloud provides phone/video support throughout installation.

Step 6 — Add upgrades: Optional red light therapy integration (660nm + 850nm bench-integrated LEDs). Improved ventilation if needed. Updated interior lighting (warm, non-blue wavelengths for evening use).

Wood compatibility

Western Red Cedar — ideal. Naturally aromatic, rot-resistant, dimensionally stable at heat. If your traditional sauna is cedar, you're in the best possible starting position. Hemlock — adequate. Common in traditional saunas and works well with infrared. Spruce and pine — usually fine. Spruce is a standard sauna wood. Resinous knots in spruce or pine can bleed a little sap when heated by infrared panels at close range. If your sauna has had no sap issues at traditional temperatures, it will likely be fine at infrared's lower temperatures — just check the knots near where panels will mount.

The cost-benefit math

Much of a new build's cost is already done in your existing room: framing, insulation, vapor barrier, wood finishing, bench construction, door, and exterior structure are all done. Conversion cost is primarily the heater system, control panel, CORE 5 power supply, electrical modification, and installation labor. A conversion usually costs well under a comparable new custom infrared build. Start here to get a free conversion assessment.

Can you convert an infrared sauna to a traditional sauna?

Usually not. Infrared cabins aren't built for the 170–200°F air a traditional heater produces. Their walls are thin, they often have no vapor barrier, their wiring and electronics run inside the walls, they have no clearances designed for a rock heater, and they often have no dedicated 240V circuit sized for one.

A traditional heater must be a listed sauna heater (UL 875 in the US), installed with the manufacturer's clearances in a room built for it. If you want traditional heat, build or buy a room designed for a traditional heater rather than adding one to an infrared cabin.

Frequently asked questions