Sunray Grandby 3-Person Outdoor Sauna

Sunray Saunas Traditional Cabin

Prices verified August 2026

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Specifications

Sunray Grandby 3-Person Outdoor Sauna full specifications
SpecValue
DetailValue
Dimensions72" x 47" x 87"
Exterior Height87"
Exterior Width69"
Exterior Depth47"
Interior Height68"
Interior Width55"
Interior Depth43"
Product Weight425 lbs
PowerETL/CSA Certified - Meets all US and Canadian electrical safety standards - 120V, 20 amps

Cost to own

Sunray Grandby 3-Person Outdoor Sauna cost and warranty figures
MetricValue
Cost per session (3yr basis)$25.58
Monthly running costvaries (heater dependent)
True delivered price$3,990
Warrantyper manufacturer

Assumptions: electricity at $0.17 per kWh (US average), cost per session over 3 years at about 1 session per week (price divided by 156), sauna running cost at a 30-minute session. These are estimates for comparison, not quotes.

What owning traditional cabins involves
OwnershipWhat it means
UpkeepTwo jobs, on different clocks. The stones are checked at least once a year, rearranged, and any that have broken, crumbled or discoloured are replaced, which keeps the heater from working against a packed bed. The exterior is resealed or restained every 2 to 4 years with an exterior-grade product carrying UV inhibitors, sooner under strong sun, snow or coastal salt, with a look each year for fading and dry patches. Inside, benches and backrests are wiped down after a session and nothing is sealed: sealant and wood protectant are not used anywhere inside a sauna, and tired interior wood is sanded back instead.
What you rebuySauna stones (checked yearly, replaced as they crumble), Exterior stain or sealant with UV inhibitor (every 2 to 4 years)
Where they failStones crumbling into the heater bed, with broken pieces underneath as the tell; Discolouration or limescale on the heater elements, which Harvia gives as the signal to replace the heater; Exterior wood left unsealed past its interval, where fading and dry patches show first

These apply to the class, not to this record alone, and they are sourced from the manufacturer guidance for it. Anything a source does not state is left out rather than estimated.

Other traditional cabins

The nearest in this class by price. Compare like with like before you decide, or open the full class below.

Compare head to head

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Sunray Grandby 3-Person Outdoor Sauna FAQ

What does the Sunray Grandby 3-Person Outdoor Sauna cost?

$3,990 delivered, which is $25.58 a session over three years at about one session a week. Every traditional cabin on the same axis.

What warranty does the Sunray Grandby 3-Person Outdoor Sauna carry?

per manufacturer, from Sunray Saunas. Every traditional cabin warranty side by side.

What is involved in owning a traditional cabin?

Two jobs, on different clocks. The stones are checked at least once a year, rearranged, and any that have broken, crumbled or discoloured are replaced, which keeps the heater from working against a packed bed. The exterior is resealed or restained every 2 to 4 years with an exterior-grade product carrying UV inhibitors, sooner under strong sun, snow or coastal salt, with a look each year for fading and dry patches. Inside, benches and backrests are wiped down after a session and nothing is sealed: sealant and wood protectant are not used anywhere inside a sauna, and tired interior wood is sanded back instead. You rebuy sauna stones (checked yearly, replaced as they crumble), exterior stain or sealant with uv inhibitor (every 2 to 4 years). How every traditional cabin compares.