1. Fill hot tub with water.

2. In the stovebox start a small fire with kindling and paper.

3. Allow plenty of air to the fire.

4. Add small pieces of dry firewood until stovebox is full, keeping the fire intense.

5. Continue to add wood periodically for 1.5–3 hours until tub has reached bathing temperature.

6. Stir water often to circulate warm water.