Hot tubs: wood-fired and electric
Wood-fired tubs heat in a few hours and cost firewood per use; insulated electric spas stay warm all week for a few kWh a day. Compare the two for the way you would use them.
Updated Oct 17, 2026
Plan it with real numbers
- CalculatorHot tub costHeat-up time and weekly energy for wood-fired and electric hot tubs.
- CalculatorTub volume & weightLitres or gallons, weight when full, deck load and filling time.
- GuideWood-fired hot tubHeat-up time and firewood by size and weather.
- GuideWood-fired vs electric tubFire and a few hours' heat-up, or always-on warmth from the mains.
- GuideHot tub temperatureThe safe maximum and what each degree costs.