posted 7 years ago
I don't know how fire retardant borax is, though I have heard it mentioned. I would still seal cardboard or other flammables up in a natural plaster wall, away from oxygen.
As to the thermal comfort and humidity, I think the most important part of the greenhouse house idea is that the house part have adequate separation from the greenhouse to control humidity. Otherwise, you run into the same mold and fungal issues as people who have inadequately designed indoor gardens.
I would definitely want weather-strip-lined doors and windows that can be closed, and a separate air exchange system, including fresh air from outside, not coming through the greenhouse.
Plants and people don't often share the same range of comfort, or necessity, in some cases. It's important to give them everything they need, but you can't risk your health to do that.
-CK
A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.
-Robert A. Heinlein