33rd of 59 in Saunas

Almost Heaven Blackwater 1-2 Person Outdoor Mini-Cube Sauna

Electric stove
2 people
Up to 186-194°F
240V hardwired

SVT Score, Mid

Usability5.4/10Social5.3/10The SVT Score is placed on its category's range

Versus

SVT SCORESRead review

A one-to-two-person outdoor cedar cube with a metal roof and a 6 kW Harvia stove, rated to 194°F, on a hardwired circuit.

$8,397

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SKU: AHCUBEMINIRU Category: Saunas Brand: Almost Heaven

Usability

5.4 out of 10

Temperature10KIP-heated saunas rated to 194°F by the maker

Capacity3two seats

Better on capacitySun Home Nova 6 traditional saunaSeats six. $15,799Scores 10.0

Build & Insulation7solid cedar, tempered glass, heater guard, metal roof and outdoor design

Walls: 1⅜ in ball-and-socket cedar, stainless steel bands

Features & Water Care4light bar, delayed-start timer, backrest

Better on features & water carePlunge Sauna MiniAn app. $12,490Scores 7.0

Verification4included KIP 6 kW heater is UL listed (E129791); no UL 875 or CSA 164 listing for the sauna.

Searched: UL Intertek CSA CPSC Health Canada
Record: UL Product iQ, KPSX Sauna Heating Equipment (UL 875); KPSX7 for Canada, KIP-30-B1, -45-B1, -60-B1, -80-B1, -30-B3, -45-B3, -60-B3, -80-B3, -30-W1, -45-W1, -80-W1, -30-W3, -45-W3, -60-W3, -80-W3 (profile 'More Models'); row ships '6 kW KIP Heater w/ Dials', Harvia Finland Oy

Better on verificationSun Home Nova 6 traditional sauna$15,799Scores 6.0

Warranty & Support1heating elements one year, other heater parts five years, labour excluded

Cabin: limited lifetime against manufacturing defects, original owner, contiguous US only

Better on warranty & supportPlunge Sauna StandardThe heater. $12,990Scores 3.0

Heating / Cooling Power

Not scored: interior dimensions not published; 6 kW KIP stove

Price

Option: KIP Smart Heater with Fenix $9,681.00
Option: Spirit Smart Heater with Fenix $11,253.00
Option: Onyx stain inside and out $9,430.00

Strengths

Metal roof included in the kit
Solid cedar walls held by stainless bands
Heater guard and backrest with light bar included
Small footprint for a patio or rooftop
Harvia stove reaches the full sauna temperature limit

Drawbacks

Short warranty with no labour cover
Interior size not stated on the product page
High price for a two-seat room
Onyx finish adds weeks to shipping
Needs a hardwired circuit and an electrician

Verdict

A neat roofed cube for one or two, but pricey for its size

Social score

5.3 out of 10

RedditBrand-level5 out of 10

r/Sauna: a new barrel owner in the Pacific Northwest reported heavy leaks inside after one day of rain with no roof cover fitted (May 2024)
r/Sauna: an owner of a Costco 4-person barrel reported reaching 185°F and recommended it on a budget (Oct 2025)
r/Sauna: an owner reported more than a dozen replacement parts and a $1,000 partial refund from Harvia US, still without a complete sauna (Oct 2026)

GoogleBrand-level6 out of 10

Garage Gym Reviews scored the Costco Morgan barrel 4.2 of 5 after logging about 190°F in about 30 minutes; its buy link is a dealer affiliate link (Jun 2026)|SaunaNews noted that cedar barrels sold without a roof or cover weather faster outdoors (Apr 2026)

YouTubeBrand-level5 out of 10

Adam C Korson reviewed his Costco-bought Morgan barrel after one month and again after six months, setting out its problems and upkeep (Mar and Aug 2025)|Wally Makes Stuff, a carpenter, built the Costco barrel and added reinforcement tips beyond the manual (Sep 2025)

AmazonNot scored

The Amazon pool is blank: the Almost Heaven Saunas store on Amazon US showed accessories and one barrel sauna listing without a visible star rating in a web search (November 2026).

User reviewsNot scored

The retailer pool is blank for every row: a search of Walmart, Home Depot, Lowe's, Best Buy and REI in November 2026 turned up no listing of these models with ten or more native reviews.

Reviews

Its Trustpilot page is unclaimed and held no reviews in November 2026.

Track record

BBB rated Almost Heaven Saunas, LLC of Holland, Michigan D, not accredited, with seven complaints in three years, in November 2026.
A search of CPSC and Health Canada recalls in November 2026 found no recall naming Almost Heaven saunas or cold plunges.

Not countedExcluded

The Harvia heaters carry one year on the heating elements and five years on other parts, and electrician costs are excluded.
The cold plunge's chiller carries one year, with labour excluded.
Not counted in any pool: first-party reviews, the brand's video channel and social pages, gifted saunas, and testers paid through affiliate links.
The retailer pool is blank: a search of Walmart, Home Depot, Lowe's, Best Buy and REI turned up no listing of this model with ten or more native reviews (November 2026).

Specs

TypeTraditional
HeaterElectric stove
FormCube
PlacementOutdoor
Seats2 people
Max Temperature186-194°F
Min TemperatureNot applicable
Capacity (Gallons)Not applicable
ChillerNot applicable
HeatsNot applicable
Water CareNot applicable
Power Supply240V hardwired
EMF MeasuredNot measured
CertificationsComponent listing only
Warranty1 Year

Show 9 moreShow fewer

Not published by Almost Heaven: emf claimed.

Not checked: The interior volume, which the product page does not give

At a glance

Built in the USA
Ships in six to eight weeks
Large front window

Company

The brand belongs to Harvia Plc of Muurame, Finland, whose subsidiary Harvia US Inc. bought the business at the end of 2018.
Almost Heaven manufactures its barrel saunas in West Virginia, and some of its cabins are made in Estonia and Romania.

Where it sells

Almost Heaven Saunas sells saunas and a cold plunge in the US, from a one-person infrared cabin to a six-person outdoor cabin with a porch.
It sells through its own store at almostheaven.com, through sauna dealers and through Costco.
It also sells on Walmart as its own marketplace seller.
Its Amazon US store carries accessories and one barrel sauna listing.

Description

The Almost Heaven Blackwater Mini-Cube is a one-to-two-person outdoor cube sauna in rustic cedar with a large front window, sold with a 6 kW Harvia KIP stove with dials. Almost Heaven rates its KIP-heated saunas to a maximum of 194°F, and the product page shows 140-194°F for dry heat.

The walls are 1⅜ in ball-and-socket cedar with stainless steel bands, any glass is tempered, and two metal roof panels with trim come in the kit. The stove needs a 240 V, 30 A hardwired circuit, and the LED light plugs into a 120 V outlet.

Stones, a heater guard, two benches and a backrest with an LED light bar are included. The interior dimensions are not published; the shipping weight is 745 lb and the crate is 90 by 45 by 45 in.

Options: a KIP Smart Heater with the Fenix Wi-Fi control at $9,681.00, a Spirit Smart Heater with Fenix at $11,253.00, and the Onyx stain inside and out at $9,430.00.