Installing a home sauna is an exciting project, but proper preparation ensures your investment performs optimally and lasts for years. Whether you're adding a compact infrared unit to a spare room or building out space for a traditional sauna, understanding the requirements beforehand prevents costly surprises.
This guide covers everything you need to know before your sauna arrives, from space planning to electrical requirements and beyond.
Choosing the Right Location
The first step is selecting where your sauna will live. Consider these factors:
Indoor Locations
- Spare bedrooms: Ideal for infrared saunas; typically have adequate space and power access
- Basements: Great for larger saunas; concrete floors handle moisture well
- Bathrooms: Convenient for showering after sessions; often have appropriate flooring
- Garages: Good for larger installations; may require insulation in colder climates
- Dedicated wellness rooms: The ultimate option if you have the space
Outdoor Locations
For barrel saunas or outdoor cabins, consider:
- Proximity to the house (for electrical connections and convenience)
- Level ground or need for a foundation
- Privacy from neighbours
- Access for delivery (some barrel saunas arrive fully assembled)
- Drainage considerations
In Australia's varied climate, outdoor saunas work year-round in most regions. However, in tropical areas, consider shade placement and ventilation to prevent excessive heat buildup. In cooler regions, proximity to the house matters more for comfort.
Space Requirements
Measure your space carefully before purchasing. Remember that you need clearance around the sauna, not just space for the unit itself.
Minimum Clearances
- Sides and back: Most manufacturers recommend 5-10cm clearance from walls
- Front: Allow at least 90cm for comfortable entry and exit
- Ceiling: Standard residential ceilings (2.4m) work for most saunas
- Above the sauna: Leave space for ventilation if required
Typical Sauna Dimensions
- 1-person infrared: 90cm x 90cm to 100cm x 100cm
- 2-person infrared: 120cm x 110cm to 140cm x 120cm
- 3-person infrared: 150cm x 130cm to 180cm x 140cm
- 4-person traditional: 180cm x 180cm or larger
- 2-person barrel sauna: 180cm diameter x 180cm length
Electrical Requirements
This is often the most critical preparation step and the one most likely to require professional assistance.
All electrical work in Australia must be performed by a licensed electrician. This includes installing new power points, dedicated circuits, and any hardwiring. Never attempt DIY electrical work—it's illegal and dangerous.
Understanding Power Requirements
Small infrared saunas (1-2 person):
- Typically 1,000-2,000 watts
- Often run on standard 10-amp household outlets
- May require a dedicated circuit (no other appliances sharing)
Larger infrared saunas (3-4 person):
- Usually 2,000-3,000 watts
- Typically require 15-amp dedicated circuits
- May need hardwiring rather than plug-in connection
Traditional electric saunas:
- 4,500-9,000 watts depending on size
- Require 15-32 amp dedicated circuits
- Often need 3-phase power for larger heaters
- Always hardwired installation
Before buying a sauna, have an electrician assess your current electrical capacity. They can tell you if upgrades are needed and provide a quote. Factor this cost into your budget.
Ventilation Requirements
Proper ventilation is essential for comfort, safety, and preventing moisture damage.
Infrared Saunas
Generally have modest ventilation needs since they don't produce steam. Most prefab units have built-in vents. Ensure the room has adequate air circulation—a slightly open window or door nearby is often sufficient.
Traditional Saunas
Require more careful ventilation planning:
- Fresh air intake: Low vent near the heater brings in fresh air
- Exhaust vent: Higher vent on opposite wall allows hot, moist air to exit
- Airflow rate: Aim for complete air exchange 3-8 times per hour
- Post-session ventilation: Ability to fully air out the sauna after use
Flooring Considerations
The floor beneath and around your sauna should be water-resistant and easy to clean.
Suitable Flooring Types
- Ceramic or porcelain tile: Ideal choice; waterproof and easy to clean
- Vinyl or linoleum: Budget-friendly and water-resistant
- Sealed concrete: Perfect for basements and garages
- Natural stone: Premium option; ensure proper sealing
Flooring to Avoid
- Carpet (absorbs moisture, promotes mould)
- Untreated hardwood (warps with moisture exposure)
- Laminate (moisture causes swelling and separation)
If installing on existing carpet, consider removing carpet in that area and installing waterproof flooring, or placing a waterproof mat beneath the sauna.
Structural Considerations
Most home saunas don't require structural modifications, but it's worth verifying:
- Floor load capacity: A 4-person sauna with occupants can weigh 500-800kg. Standard residential floors typically handle this, but check if your floor is particularly weak or if placing on an upper level
- Ceiling height: Ensure adequate clearance for the sauna and any required ventilation
- Door swing: Sauna doors should swing outward for safety; ensure space for this
Preparing for Outdoor Installation
Outdoor saunas require additional preparation:
Foundation Options
- Concrete slab: Most durable; requires professional installation
- Gravel pad: Good drainage; suitable for barrel saunas
- Deck or patio: Ensure it can support the weight
- Pavers: Level installation required; ensure stability
Additional Outdoor Considerations
- Electrical cable routing from house to sauna location
- Weatherproofing connections and any exposed components
- Council regulations (some areas require permits for outdoor structures)
- Delivery access for large or pre-assembled units
Preparation Checklist
Before your sauna arrives, ensure you've addressed:
- Confirmed the sauna fits in your chosen location with proper clearances
- Had an electrician assess and prepare electrical requirements
- Verified flooring is appropriate or made necessary changes
- Ensured adequate ventilation is available
- Cleared the installation path (doorways, hallways, stairs)
- Prepared any outdoor foundations if applicable
- Checked local council requirements for outdoor installations
- Arranged for help if assembly assistance is needed
Taking time to properly prepare your space ensures a smooth installation and optimal performance from your new sauna. For more guidance on choosing the right sauna, see our Beginner's Guide to Home Saunas.
