Facts

Saunas are increasingly infrared models, meaning they heat objects in the sauna rather than the air. This makes them ideal for installing in a home, such as a basement or other room. Spas come in a variety of styles, differing jets, capacity, filtration, seat styles and other various features. Installation options include indoors, patios, gazebos or under a covered porch.

Features

The health purposes for saunas and spas are quite different. Saunas help release toxins from the body by heating a person's skin. Spas use hydrotherapy, which is a combination of warm water and jets to relax and rejuvenate muscles.

Considerations

Electricity costs also vary between saunas and spas. Crystal Sauna notes a two-person sauna run one hour, five times a week costs $5 to $7 a month, as of 2010. HotTubLiving.com reports that a spa can cost $10 to $30 a month, also as of 2010.