[Strawbale] insulation and thermal recovery

[Shody Ryon]

I was wondering if there is any interest in the efficacy of using a space between the skin of a structure for the reflection of radiant heat? Is it worth the extra material and construction costs for the increase in R value, and could that air be captured and used somehow (assisting a thermal recovery ventilation system in winter)? Should the optical space be utilized in the exterior of the sun facing wall and roof and in the interior (between drywall and insulation) in the other walls and roof?
Shody