Barrel vs Cabin Sauna: Volume, Heater Size, Base and Price Compared

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In the two makers’ lines we compared, the barrel at the same seat count has less air to heat and a smaller footprint. A cabin gives you more headroom and floor space, and at some seat counts it needs a bigger heater. LeisureCraft’s 4-person barrel lists 222 cubic feet inside, against 263 for its 4-person cabin, and both get a 6 kW heater. At 6 seats, LeisureCraft’s cabin calls for a 9 kW heater, against 7.5 kW for its barrel. Almost Heaven’s 6-person barrel and 6-person cabin both start with an 8 kW heater, and the barrel is listed at $8,844 against $10,722 for the cabin (checked Nov 1, 2026). Almost Heaven also says its cabins need a prepared foundation, while its barrels can sit on pavers.

Room volume and heater size

A barrel’s round walls cut off the corners a box would have. LeisureCraft’s Harmony barrel measures 83 × 71 × 79 inches inside (W × D × H) and lists 222 cubic feet. A box with those inside measurements would hold about 269 (our arithmetic).

Here is one maker’s line side by side, from the LeisureCraft spec tables (Canadian Timber collection, all in Eastern White Cedar), as LeisureCraft lists them:

LeisureCraft’s own tables don’t always add up: they give the 5-person Serenity barrel the same inside size as the 4-person Harmony, so confirm sizes with a dealer before you order. The Almost Heaven pair at 6 seats, from the product pages:

By those inside sizes, the Seneca holds about 214 cubic feet and the Allegheny about 273 (our arithmetic), yet both start with the same 8 kW heater and 40-amp requirement.

Harvia’s sizing rule: “An average of 1 kW of heater power is required per cubic meter of sauna volume.” To size a heater for your own room, enter the inside measurements in the sauna calculator, which treats a barrel as a cylinder and a cabin as a box. The amp figures above are the maker’s; a licensed electrician confirms the circuit and pulls the permit. More on that in sauna electrical requirements.

Walls, roof and heat-up time

Neither maker we read publishes separate heat-up times for its barrels and its cabins. Almost Heaven’s heater FAQ gives one figure for all its saunas: “Typically, our saunas will heat to 165°F in 30–40 minutes and to 185° in less than 60.” LeisureCraft uses the same line for both shapes: the design “maximizes heat efficiency.”

Per their spec lists, the walls at these two makers are solid wood in both shapes, with no framed wall and insulation inside. Almost Heaven lists its barrel staves as “Ball-and-socket lumber: 1 ⅜″ thick” and its Allegheny cabin as “Lumber thickness 1 & 1/2″.” A framed, insulated cabin is a different build. For framed walls, Fixr notes that 2 × 4 walls usually get R13 insulation, 2 × 6 walls R19, and the ceiling R26 or higher.

The roof is where the shapes differ most. Almost Heaven’s barrel manual says you “may experience water seepage, particularly on the top and sides,” that it “will NOT harm the sauna,” and that a roof or the company’s rain jacket keeps it out. Almost Heaven describes the Allegheny cabin’s “sloped roof,” and LeisureCraft’s cabins come with metal shingles. LeisureCraft’s barrel page also has an assembly video for a shingle roof that goes over a barrel.

Seating space and headroom

Barrels are lower inside: 79 inches of interior height for the LeisureCraft barrels, against 84.25 to 86.25 inches for its cabins. Almost Heaven’s 6-person Seneca barrel is 79⅝ inches high inside; the 6-person Allegheny cabin is 84 inches. The round wall also slopes over the benches. Barrels from both makers have benches along the two sides: the Seneca’s are 20 11/16 inches wide and LeisureCraft’s are 20 inches. The Allegheny cabin has two levels instead, a 24-inch upper bench and a 19-inch lower one, both 75 inches long. LeisureCraft’s 6-person Georgian cabin can add a changing room (48.5 inches more depth) or a porch (24.5 inches); its configurator doesn’t offer either on the smaller Palmer or Granby.

Foundation and placement

Almost Heaven’s FAQ is direct about the difference. For barrels it recommends “a solid foundation such as concrete, pavers, decking, or even stone,” and if that isn’t possible, “it is ok to use a solid and flat piece of dirt or grass.” For cabins: “Cabins and the Cube should be built on a prepared foundation however, typically concrete is the best option.” Its barrel manual asks for a firm, level surface that can carry “the weight of the sauna and its users (1,000+ lbs),” with the cradles on paver stones or similar if the barrel sits on the ground.

Footprint matters too. At 6 seats, the Seneca barrel is 82⅜ × 82 inches assembled; the Allegheny cabin is listed at 86 × 125 inches assembled. This Old House’s $4–$8 per square foot is a range for concrete slabs in general (its example is a 30-by-30-foot slab), and its average for a shed slab is $480, so a small pad can cost more per foot. At $4–$8, a slab just the size of each footprint would be about $190–$375 for the Seneca and $300–$600 for the Allegheny (our arithmetic). Before digging for any base, call 811 a few business days ahead. Options are compared in sauna foundation options.

Both of these 6-person models ship by flatbed. The Allegheny needs “a personal offload, either by hand with 1-4 people, or with a forklift.”

Price comparison

Listed prices on Almost Heaven’s site, checked Nov 1, 2026, for the base configuration (confirm the heater is included), before delivery, base, wiring and assembly (prices change):

At 6 seats with the same heater, the cabin is listed at $1,878 more (our arithmetic). Almost Heaven offers professional installation “starting at $1,400.” Fixr’s installed prices are by capacity; Fixr doesn’t say which sauna type: $3,000–$6,000 for 2–4 people and $6,000–$9,000 for 5–7. Fixr puts “a 220-volt circuit in the home’s existing electrical panel” with “a 220-volt receptacle” near the sauna at $500–$800. These heaters are hard-wired, so treat that as a rough figure. The outdoor sauna cost page breaks the total down.

Which one fits your yard

• Small yard, no concrete yet: a barrel. It has less air to heat, a smaller footprint, and Almost Heaven allows pavers or firm, level ground under the cradles.
• You want to stand up, lie down or add a changing room: a cabin, with a prepared foundation. At 6 seats, check whether the maker calls for a bigger heater, as LeisureCraft does (9 kW for its 6-person cabin), and ask an electrician what circuit that heater needs.
• Wet climate: if you want to keep rain out, budget for a roof over a barrel, or choose a cabin with a pitched roof.

Our reading: decide on shape after you know your seat count, your circuit and your base, not before. Barrel-specific checks are in the outdoor barrel sauna buying guide.

Illustrations on this page are AI-generated to help you picture the situation. They are not photos of real homes, jobs or people.

Sources

1. LeisureCraft (Dundalk LeisureCraft) — CT Barrel Saunas: Harmony, Serenity, Tranquility, size table (accessed Nov 1, 2026)
2. LeisureCraft (Dundalk LeisureCraft) — CT Cabin Saunas: Granby, Palmer, Georgian, size table (accessed Nov 1, 2026)
3. Almost Heaven Saunas — Pinnacle 4 Person Barrel Sauna page, outdoor sauna FAQ on foundations (checked Nov 1, 2026)
4. Almost Heaven Saunas — Seneca 6 Person Barrel Sauna, product page and specifications (price checked Nov 1, 2026)
5. Almost Heaven Saunas — Allegheny 6 Person Cabin Sauna, product page and specifications (price checked Nov 1, 2026)
6. Almost Heaven Saunas — Barrel Sauna Installation & Owner's Manual (9-2024)
7. Almost Heaven Saunas — Pro 20 Kit with Chimney page, heater FAQ on heat-up time and standard heater (checked Nov 1, 2026)
8. Harvia — Electric heaters (harvia.com, accessed Nov 1, 2026)
9. Fixr — Cost to Install a Sauna (updated Jan 31, 2025)
10. This Old House — Concrete Slab Cost (updated Mar 17, 2026)
11. Call 811 (Common Ground Alliance) — 811 Before You Dig (accessed Nov 1, 2026)

Updated 2026-11-02