Skip to content
Menu

Almost Heaven Saunas Blackwater 4 Person Cube Sauna

A cube sauna kit from Almost Heaven Saunas. Every figure below is Almost Heaven Saunas' own, linked to where it is published. Price on Almost Heaven Saunas' own site: From $14,085 (almostheaven.com, 23 Sep 2026).

Buy from Almost Heaven Saunas
Specifications published by Almost Heaven Saunas (10)
Format
Cube saunaBlackwater 4 Person Cube Sauna - Almost Heaven Saunas
Outside dimensions
84 ⅜″W x 71″D x 85 ⅞"HBlackwater 4 Person Cube Sauna - Almost Heaven Saunas
Inside dimensions
79 ⅝″W x 63 ¼″D x 79 ⅝″HBlackwater 4 Person Cube Sauna - Almost Heaven Saunas
Heater
9kW Virta Smart Heater + Fenix / 9kW Spirit Smart Heater + Fenix / M3 Wood Burning Heater KitBlackwater 4 Person Cube Sauna - Almost Heaven Saunas
Heater output
9 kWBlackwater 4 Person Cube Sauna - Almost Heaven Saunas
Electrical supply
9kW, 240V, 45-amp requirement, hard-wire connectBlackwater 4 Person Cube Sauna - Almost Heaven Saunas
Benches
24" Upper Bench / 20" Lower BenchBlackwater 4 Person Cube Sauna - Almost Heaven Saunas
Warranty
Almost Heaven Saunas come with a Limited Lifetime Warranty covering manufacturing defects, while Harvia heaters include a 1-year warranty on heating elements and 5 years on other componentsBlackwater 4 Person Cube Sauna - Almost Heaven Saunas
Made in
USABlackwater 4 Person Cube Sauna - Almost Heaven Saunas
Price on the maker's site
From $14,085 (almostheaven.com, 23 Sep 2026)Blackwater 4 Person Cube Sauna - Almost Heaven Saunas

As published by Almost Heaven Saunas, read on 2026-09-22. Makers revise their products; check Almost Heaven Saunas' current specification before you buy.

Before you buy

  • Electrical supply. Almost Heaven Saunas lists 9kW, 240V, 45-amp requirement, hard-wire connect. A licensed electrician should confirm your supply against the installation manual before you buy.
  • Shape and space. Our barrel vs cabin guide explains how the two outdoor shapes differ.
  • Heater size. If you choose your own heater, our heater sizing guide explains how makers match output to room volume.

Also see

If you are looking for more

Other cube saunas

Blackwater 4 Person Cube Sauna: questions answered from Almost Heaven Saunas' specification

What heater comes with the Blackwater 4 Person Cube Sauna?

Almost Heaven Saunas lists: 9kW Virta Smart Heater + Fenix / 9kW Spirit Smart Heater + Fenix / M3 Wood Burning Heater Kit. Related question: Do sauna kits come with a heater?

Source: Blackwater 4 Person Cube Sauna - Almost Heaven Saunas

How big is the Blackwater 4 Person Cube Sauna on the outside?

Almost Heaven Saunas gives the outside dimensions as 84 ⅜″W x 71″D x 85 ⅞"H.

Source: Blackwater 4 Person Cube Sauna - Almost Heaven Saunas

What electrical supply does the Blackwater 4 Person Cube Sauna need?

Almost Heaven Saunas lists 9kW, 240V, 45-amp requirement, hard-wire connect. Have a licensed electrician confirm your supply against the installation manual before you buy. What the makers publish about circuits and permits: Sauna electrical supply and permits.

Source: Blackwater 4 Person Cube Sauna - Almost Heaven Saunas

What warranty does Almost Heaven Saunas give on the Blackwater 4 Person Cube Sauna?

Almost Heaven Saunas lists: Almost Heaven Saunas come with a Limited Lifetime Warranty covering manufacturing defects, while Harvia heaters include a 1-year warranty on heating elements and 5 years on other components.

Source: Blackwater 4 Person Cube Sauna - Almost Heaven Saunas

Where is the Blackwater 4 Person Cube Sauna made?

Almost Heaven Saunas lists: USA.

Source: Blackwater 4 Person Cube Sauna - Almost Heaven Saunas

What does the Blackwater 4 Person Cube Sauna cost on Almost Heaven Saunas' site?

Almost Heaven Saunas' own site showed from $14,085 (almostheaven.com, 23 Sep 2026). That is the maker's price, not a retailer's or Amazon's; prices change, and the seller's page shows the current one. Related question: How much does a sauna kit cost?

Source: Blackwater 4 Person Cube Sauna - Almost Heaven Saunas

More from Almost Heaven Saunas: all Almost Heaven Saunas products on Saunakivi.

Sources

  1. Blackwater 4 Person Cube Sauna - Almost Heaven Saunas — Almost Heaven Saunas