Linden wood sauna hourglass

The HARVIA hourglass made of linden wood measures approx. 15 minutes

(the interval may vary by 2 minutes) and the hourglass is designed for use in indoor saunas. The ambient temperature in the environment where the hourglass is located should not drop below 5°C, as there is a risk of water condensation in the sand and the hourglass could be damaged.