Swell Sport · Practical guide

Planning a sauna budget when electricity prices change

Build a sauna budget that can be repriced without guessing future electricity markets. Keep measured energy, planned cycle count and tariff assumptions in separate cells.

Swell Cedar Cube 2 in a home setting.

Start with a repeatable baseline

Choose a representative complete-cycle energy figure from your own monitoring and show the spread of observations beside it. Record whether the measurement includes controls, lighting and any instructed powered finishing stage. If no data exists yet, label the figure provisional and replace it after commissioning rather than calling it typical performance.

Choose a realistic number of powered cycles for the budget period. This is a household planning input, not advice about sauna frequency or how long anyone should remain inside. Keep maintenance, installation and equipment replacement outside the electricity row so a small usage figure does not masquerade as total ownership cost.

Construct a simple sensitivity table

Suppose the budget assumes 12 powered cycles using 6 kWh each, all imported for this example. That totals 72 kWh. At illustrative tariffs of $0.28, $0.36 and $0.44 per kWh, usage costs are $20.16, $25.92 and $31.68. The difference between the low and high cases is $11.52 for that stated period.

These rates are deliberate sensitivity inputs, not current Australian quotes or forecasts. The energy figure is also hypothetical, not measured Cube consumption. Label the columns low, middle and high assumption rather than next year’s prices. A useful table tells you how exposed the budget is to a change without pretending to know which change will occur.

Update the components that actually changed

If the retailer changes the usage rate, keep the measured kWh baseline and reprice it. If the household changes its routine, update cycle count separately. If both change at once, retain the old assumptions so the difference remains explainable. Save the new tariff notice with its effective date and GST treatment.

Government guidance distinguishes fixed supply charges from variable energy and demand charges. Keep supply-charge changes on a household row, and do not assign the full existing charge to each sauna cycle. ^[1] For time-of-use plans, repeat the sensitivity calculation using the measured energy in each band rather than one blended rate unless the blend is explicitly documented. ^[2]

Add solar without promising a free cycle

For solar homes, maintain separate assumptions for grid imports and energy that would otherwise have been exported. Government guidance explains that exported surplus may earn bill credits. ^[3] A budget that prices all circuit consumption as imports may overstate purchased energy, while a zero-cost daytime assumption may ignore that export trade-off.

Decide in advance what budget change would trigger a review of the household schedule or retailer offer. Do not respond to a price increase by extending personal heat exposure to ‘get value’, disabling safeguards or promising a universal shorter warm-up. Review the numbers and practical timing first. The table is a decision aid, not a requirement to use the sauna a particular number of times.