Serenity MP 4 Person Barrel Sauna (CTC2245MP)

A 4-seat white cedar barrel at $7,975, $1,848 above the standard Serenity, with the data unable to say what the MP version adds.

Serenity MP shares its seats, wood, porch, warranty and 94.5 by 86.25 inch shell with the Serenity. It weighs 1,278 pounds, 165 more, and costs $7,975 against $6,127. That puts it at $1,994 per seat, 50 percent above the barrel median and 32nd of 37.

We cannot say what the MP stands for or what the extra weight is, and the data has no heater type or power. Dundalk's page would tell you. The comparison is unkind to this model: the Almost Heaven Charleston has a canopy and 6 kW for $6,252, and the SunRay Galley $5,890 with a 10-year warranty. Pay the premium only if the maker's page shows features you want. Topture is the only store.