The Smarthouse Technology Guide features an infrared sauna that burns more then 1,000 Calories in about 30 minutes. This sounds very interesting.
The sauna technology is from a small company called Health Mate.

It claims its sauna’s can burn up to 1000 calories in 30 minutes and provide great health benefits for the skin, due to increased blood flow, and also relief from arthritis, strains and sprains.

A brief perusal of the Health Mate site shows this interesting health claim:

As you get relax in the nice heat of the Health Mate sauna, your body is working hard, producing sweat, pumping blood - and of course burning calories. According to a Journal of the American Medical Association report, in a single sauna session you may burn as many calories as you would rowing or jogging for 30 minutes. So you actually lose weight - not just water.

Lose weight - not just water? That leaves muscle, bone, fat, and organ tissues. I’m not sure how an infra-red sauna is capable of doing that. I would like to see that JAMA report.As for the 30 minutes of jogging - if a 200 pound person was running at 6 mph (10 minutes/mile) they would burn about 440 Calories.

1,000 Calories in 30 minutes? That’s a very extreme claim. Buy hey, nothing is impsosible in this world.