Patent ID: 8397434

Claim:
An insulation system for installation in a greenhouse between a floor and a roof of the greenhouse for assisting in the control of air flow between a first space from the floor of the greenhouse to said insulation system and a second space from the insulation system to the roof of the greenhouse, the insulation system comprising: at least a first insulation module and a second insulation module, each insulation module provided with a pair of panels, each of said panels of said pair of panels being hingedly coupled together along adjacent longitudinal edges, the insulation modules adapted to be mounted at a level defining an interior ceiling of the greenhouse and shiftable between an open position and a closed position, said longitudinal edges presenting a lowermost edge in a v-shaped pair of panels of each insulation module, wherein said insulation modules are arranged parallel to each other to define a ceiling structure, with upper edges of adjacent v-shaped pairs of panels abutting each other when said insulation modules are in the closed position; and shifting means to shift each said insulation module between the closed position and the open position, said shifting means being operably connected to each of said panels in said pair of panels, and operative to fold said panels together, wherein when said insulation modules are in the closed position, air below said insulation modules remains in said first space of said greenhouse below said insulation modules, and when said insulation modules are in the open position, air below said insulation modules can move to said second space in said greenhouse above said insulation modules, and wherein said means to shift each said insulation module from the closed position to the open position comprises a bellows formed by sealing substantially securely a gas tight membrane to edges of said panels in said pair of panels other than hinged-together edges of said pair of panels.