What CFROST Is NOT

CFROST is intentionally constrained. The following clarifications exist to protect the project’s purpose, openness, and long-term viability.

• CFROST is not a commercial product line
  It is a freely published, open specification intended for individual builders, researchers, and community experimentation—not a branded, for-profit manufacturing effort.
• CFROST is not dependent on proprietary tooling or closed manufacturing processes
  Any design that requires exclusive molds, licensed software, restricted machinery, or vendor permission falls outside the CFROST scope.
• CFROST is not a patent-encumbered system
  CFROST designs intentionally avoid copying or reimplementing patented subsystems in ways that would restrict free replication, modification, or distribution.
• CFROST is not optimized for luxury aesthetics or retail appeal
  Comfort, performance, and sensory isolation take precedence over polish, branding, or showroom presentation.
• CFROST is not a single fixed implementation
  It is a reference architecture and evolving specification, intended to support multiple builds, variations, and improvements over time.
• CFROST is not a shortcut to unsafe or poorly engineered flotation
  Open-source does not mean low standards; designs must still meet clear structural, thermal, sanitation, and safety requirements.
• CFROST is not centralized
  No individual, company, or organization controls how CFROST is built, forked, or adapted, provided the work remains open and compliant with the core doctrine.

The initial CFROST build

CFROST version 1 tank is based around Duncan Scott’s open source float tent. It is 99% completely inspired by Duncan Scott’s float tent with one variation – the base of the tank has a hard plastic shell that a heating element can be inserted into and removed from. This is inspired by Kirk Sullivan’s FLOAT-ES 4-piece design. Ie, the base of the tank is similar to the base of the float-es tank.

We continue with Part 1 of the description below, where we regurgitate Duncan Scott’s design

inspired and based around using Intex pool liners. Cheap and easy DIY float tent : r/FloatTank (reddit.com)

Duncan Scott also posted his tank to facebook for sale, but that post is no longer active.

Google drive archive – https://drive.google.com/drive/folders/1GtvtWBH0kDbPK22uN_z1t48HaKmq_sWX?usp=sharing

Here’s an imgur gallery – https://imgur.com/a/qUAsPUt

Duncan Scott's DIY Float Tank

And here are the images inlined:

We continue with Part 2 of the description below, where we discuss the base of tank

In this picture we see the base of the float-es tank.

In the float-es tank, this base houses heating and filtration equipment. In CFROST version 1, this base only houses heating equipment. The filtration equipment is inline… if the Royal Spa actually houses filtration inline, then we can too!

This base is modified to have 4 places that poles can lock into the this base to form the rectangular float tank (by float tank we mean the part of the ioslation tank that holds 10 inches of epsom salt water).

We reuse the float-es terminology shown in this picture:

the 2 terms of relevance are “base” and “float tank”… “float tank” normally means the entire unit but here we mean the part which sits on top of the base. From part 1 of this discussion we see that this build has no “riser” or “top” per se. Instead , there is just a “top” that is pyramidal in shape…. ideally we would aim for the dimensions of the pyramid of giza.