How to Choose the Right Size Torch Sauna Heater

Andrea Kangas • January 7, 2026

A helpful guide in choosing the correct size Torch heater for your sauna

graphic- Torch Gas Sauna Heater and Dimensions

Choosing the right size sauna heater doesn’t need to be complicated. For Torch gas sauna heaters, the decision comes down to one simple measurement: the size of your sauna hot room in cubic feet (do not include the dressing room if you have one).

Step 1: Measure Your Sauna Steam Room

Calculate the cubic footage of your sauna by multiplying the length x width x height. If your sauna is not insulated, multiply the cubic footage by 1.2 to get the adjusted number. If you have windows in your sauna, multiply the width x height of each window and add to the cubic footage.

Example:

8 ft × 7 ft × 8 ft x 1.2 + 3x4 = 549.6 cubic feet

Step 2: Choose Your Heater

Choose the TS-60 if your sauna area is under 450 cubic feet

Choose the TS-80 if your sauna area is over 450 cubic feet

That’s it. For most saunas, this sizing works well and keeps things simple.

What If You’re Not Sure?

If your sauna is close to 450 cubic feet, or you’re unsure which model to choose, give us a call . We’re always happy to help you double-check and make sure you get the right heater.

Very Large Saunas

If your sauna is much larger than 900 cubic feet, a single heater may not be enough. In some cases, adding a second stove is the best solution for even heat and good performance.

If you’re unsure whether your sauna needs one heater or two, give us a call — we’re happy to help you figure it out.