How Long Does It Take to Heat Up a Sauna? A Comprehensive Guide
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How Long Does It Take to Heat Up a Sauna? A Comprehensive Guide

There's nothing quite like stepping into a toasty sauna to sweat away stress, unwind, and reap the numerous health benefits. But, how long does it take for a sauna to heat up and be ready for you to enjoy? In this comprehensive guide, we'll dive into the ins and outs of sauna heat up times, explore what affects them, and offer practical tips to get your sauna sizzling faster. Let's jump right in!

Factors That Influence Sauna Heat Up Times

Size Matters: Sauna Dimensions

When it comes to heating up your sauna, size does matter. The larger the sauna, the more air there is to heat, and thus the longer it takes. Here's a rough estimate of heat up times for different sauna sizes:

Keep in mind, these times are approximate and can vary based on other factors we'll discuss below.

The Power Play: Heater Capacity

The sauna's heater capacity, measured in kilowatts (kW), is crucial in determining heat up times. The higher the heater's kW rating, the more powerful it is, and the quicker it can heat up the space. To choose the right heater size, follow this general rule of thumb: 1 kW per 45 cubic feet of sauna space.

Insulation: Keeping the Heat In

Proper insulation is a must to ensure your sauna heats up efficiently. Saunas with inadequate insulation take longer to heat up and can lose heat quickly, resulting in wasted energy. High-quality insulation materials, such as fiberglass or mineral wool, will help keep the heat inside and speed up the process.

Tips to Improve Sauna Heat Up Times

Preheat and Plan Ahead

Planning your sauna sessions in advance allows you to preheat the sauna, ensuring it's ready when you are. Many modern sauna heaters have built-in timers or can be controlled via smartphone apps, allowing you to start the heating process remotely.

Keep the Door Shut

Every time the sauna door is opened, heat escapes, and the temperature drops. To speed up the heat up time, keep the door closed as much as possible during the initial heating phase.

Use a Sauna Stone to Your Advantage

Sauna stones play a crucial role in maintaining and distributing heat evenly throughout the sauna. Choose high-quality stones with good heat retention properties and arrange them in a way that allows for maximum air circulation.

FAQs: Your Sauna Heat Up Questions Answered

Can I speed up the heat up time in an infrared sauna?

Infrared saunas usually heat up faster than traditional saunas, often reaching optimal temperatures within 10-15 minutes. To speed up the process further, preheat the sauna and keep the door closed.

Do electric saunas heat up faster than wood-burning ones?

Electric saunas tend to heat up faster and maintain more consistent temperatures. Wood-burning saunas can take longer to reach optimal heat but offer a more authentic, traditional experience.

Does the outdoor temperature affect the sauna's heat up time?

Yes, outdoor temperatures can have a significant impact on heat up times, especially for outdoor saunas. In colder weather, it may take longer for the sauna to reach the desired temperature.


Sauna heat up times vary depending on factors such as sauna size, heater capacity, insulation, and outdoor temperature. Generally, small saunas take 15-25 minutes, medium saunas 20-35 minutes, and large saunas 30-45 minutes to heat up. To speed up the process, ensure proper insulation, preheat your sauna, keep the door closed, and optimize your sauna stone arrangement.

By understanding the factors that influence heat up times and implementing the tips provided, you'll be well on your way to a more efficient and enjoyable sauna experience. So, go ahead, plan your next sauna session, and get ready to indulge in the blissful warmth of your perfectly heated oasis.

About the Author

Havenly Team | Sauna Enthusiasts

Havenly Decor's team has 10 years of extensive research and a genuine passion for personal wellness and bettering of oneselves. We carry only the best quality sauna models (that pass our intensive quality assurance checklist) on the market today. Give us a call at 360-233-2867 or send us an email and our sauna specialists will be happy to help guide you through the sauna buying process.

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*Havenly Decor and its associates do not provide medical guidance. Consult a licensed doctor for medical advice. All of the information contained in this website is for information purposes only. Results of using our products vary on an individual basis and no immediate permanent or guaranteed solutions can be provided. We reserve the right to change, without notice, anything contained within the article. Havenly Decor shall not be held responsible for printing variations.

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