Buying a used sauna is an excellent way to enter the world of heat therapy without the premium price tag of a new unit. However, secondhand units require a rigorous inspection to ensure safety and longevity. If you are new to the hobby, you might want to start here to understand the different types of saunas available. This guide covers the critical areas you must check to avoid a costly mistake and ensure your investment remains a healthy part of your sauna routines and recovery.
Inspecting the Wood and Structural Integrity
The wood is the heart of the sauna. Unlike other furniture, sauna wood undergoes extreme thermal stress and moisture exposure.
Checking for Rot and Moisture Damage
Inspect the bottom plates and the areas around the floor. If the sauna was kept in a damp basement or outdoors without proper protection, the wood may have softened or rotted. Press a screwdriver into any dark spots; if it sinks in, the wood is structurally compromised.
Wood Discoloration and Stains
Dark stains on the benches are usually from sweat and skin oils. While these can often be sanded down as part of regular sauna maintenance, deep black staining may indicate mold growth within the wood fibers that is difficult to remove.
Evaluating the Heater and Electrical Components
The heater is the most expensive component to replace. Never buy a used sauna without seeing the heater in operation.
Testing the Heating Elements
Turn the sauna on and wait for the elements to glow or the panels to warm up. Listen for buzzing or clicking sounds, which could indicate failing contactors or relays. Ensure the unit reaches its target temperature within a reasonable timeframe without tripping a circuit breaker.
Wiring and Safety Certifications
Check for frayed wires or scorched terminal blocks. Ensure the unit has a UL or ETL listing for safety. Review our sauna safety guide before attempting any DIY electrical repairs. For health-related concerns, please see our medical disclaimer.
The Sniff Test: Identifying Mold and Odors
A sauna should smell like natural wood, such as cedar, hemlock, or spruce. Any other scent is a significant red flag.
Hidden Mold and Mildew
If you detect a musty or earthy smell, mold is likely present behind the backrests or under the benches. Mold spores thrive in the humid environment of a poorly ventilated sauna and can be difficult to eradicate completely once they take hold.
Chemical and Fragrance Contamination
Avoid saunas that smell strongly of cleaning chemicals or artificial fragrances. These substances can off-gas when the sauna heats up, potentially irritating your respiratory system during use.
Missing Components and Replacement Costs
A bargain sauna quickly becomes expensive if essential parts are missing. Check for the presence of the thermometer, hygrometer, and proper lighting fixtures. If the sauna uses stones, inspect them for cracking; they may need replacement to ensure proper airflow and heat distribution. For information on how we review products, see our affiliate disclosure.
Logistics: Transport and Reassembly
Most used saunas are sold as-is. Consider the difficulty of disassembly. Tongue-and-groove boards can become brittle over time and may crack when you try to pull them apart. Factor in the cost of a truck rental and the time required to rebuild the unit at your location before finalizing the purchase.
Frequently Asked Questions
Is it safe to buy a used infrared sauna?
Yes, provided the EMF levels are within acceptable ranges and the panels are fully functional. Many people choose them for the specific infrared sauna benefits like lower operating temperatures.
How long do sauna heaters last?
A well-maintained electric heater can last 10 to 20 years. If the used unit is over 15 years old, budget for a potential heater replacement in the near future.
Keep Reading on SaunaTutor
For more context, review our Start Here guide, browse the matching topic hub, and check the medical disclaimer before treating general sauna guidance as personal medical advice.