No-nonsense saunas for no-nonsense people

A black mobile sauna with a sign reading 'The Hot Box' on it, parked on the side of a road with trees and greenery in the background.

The Hot Box was started by a local builder who saw a gap: well-built, no-nonsense saunas for people who appreciate quality life and quality products.

Close-up of hot stones inside a sauna heater with a wooden wall in the background.
Interior of a sauna room with wooden walls and benches, a metal stove with rocks, a sauna bucket, and a wooden ladle.

Custom Built

Every sauna is custom-built here in the Bay of Plenty using quality materials and designed to handle real use — not just for show.

Close-up of a wooden fire door handle with embossed text and logo, positioned inside a custom built sauna

  • It usually takes about 45–60 minutes to reach the ideal temperature (80–100°C). Once it’s hot, the wood stove keeps the heat steady for hours, so you can enjoy a long, relaxing session.

  • To start the fire we use Douglas Fir and then once it’s running its fed with Kānuka to keep it burning hot.

  • Bring a towel, swimsuit, and a bottle of water. We recommend light, breathable clothing or swimwear inside the sauna. If you’d like to cool off between rounds, use our custom built buckets and showers for a hot-cold experience.

Visit our FAQ page for more