Greenhouse, stage 2: External, grand greenhouse covers the face of the entire structure, creating a much larger area for biocells between the outer grand shell and the formerly external greenhouse lein-to. Although the lein-to will no longer catch as much solar radiation to disperse into the home -as plants grow to shade it- the grand greenhouse catches MORE radiation, which can be vented into the hallway/ventalaton corridor as needed to heat the internal living space.
