An insect netting for a greenhouse includes a front panel merging into two side panels. The insect netting is pleated having bellow sections. Each bellow section has two parallel side bellow portions and a front bellow portion. Each side bellow portion comprises a first side gauze web and a second side gauze web connected to each other at a longitudinal side thereof, each having a first short side and a second short side. Each of the front bellow portions comprises a first front gauze web and a second front gauze web connected to each other along a longitudinal side thereof. The second short side of the first and second side gauze webs of the side bellow portions is connected to the longitudinal side of the first and second front gauze webs facing towards the hinging axis of the ventilation panel, respectively.

A window frame assembly has a built-in foldable screen, having a body, the body having at least a first frame part and a second frame part; the first frame part has at least a first end surface and a second end surface; the second end surface is fixedly connected to the second frame part; the first end surface is provided with a protruded guiding convex part; the guiding convex part is provided with a line receiving groove; and two sides of the line receiving groove are respectively provided with a concave part. The above structure has the benefits of enabling the guiding convex part located on the transverse frame in the foldable screen module to be re-assembled on the structure of the window frame assembly, thus reducing the number of foldable screen module components, and also improving the convenience of assembling the foldable screen module in the window.

Greenhouse comprising a roof construction, wherein the roof construction comprises a slanting upper surface, a first framework that defines a roof opening, and a rectangular ventilation window that covers the roof opening, wherein the ventilation window comprises a panel and a second framework along at least a distal front edge and two parallel side edges of the panel, wherein the greenhouse comprises a netting system to prevent passage of insects through the ventilation passage, wherein the netting system comprises an insect netting that covers the ventilation passage and that is pleated in a bellow configuration to collapse in a stacked manner, and a guiding provision for the insect netting, wherein the guiding provision comprises an elongate guiding bow between the first framework and second framework that extends along the insect netting, wherein the insect netting is slidably connected with the elongate bow.

A screen panel for a roll-up door is configured to be slidably coupled to the door adjacent a bottom portion of the door. The panel is generally parallel to the bottom portion when installed and movable between a retracted position, wherein a bottom edge of the panel is generally aligned with a bottom edge of the door, and an extended position, wherein the bottom edge of the panel is located below the bottom portion. A biasing device biases the panel toward the retracted position with a biasing force that is sufficient to move the panel to the retracted position only when the panel is positioned in an orientation other than a vertical orientation.

A hidden insect screen system for tilt-to-clean, double hung windows whereby raising the bottom sash (104) causes resultant opening to fill with insect screen (115a) dispensed from an ordinary self-storing roller mechanism (114) mounted inside bottom rail (109) of said sash and whereby lowering the upper sash (105) causes resultant opening to fill with insect screen (115b) dispensed from an ordinary self-storing roller mechanism (122) mounted inside window head frame (103), all furnished such that vertical edges of the screens are protected from insect passage by contacting weatherstrip-like edge seals (127), and arranged such that insect protection is maintained with minimal interruption when each sash is tilted and its glazing is cleaned, the lower end of the upper screen being attached so as to be quickly repositioned from top to bottom of said upper sash.

A fenestration assembly includes a sash, a frame surrounding the sash, and at least one screen assembly mounted in at least one of: the top portion and the bottom portion. The frame includes a top portion, a bottom portion, and two jambs forming first slots extending lengthwise along at least a portion of the jamb. The first slots each include a screen edge retention feature. The screen assembly includes a roller assembly substantially hidden from view, a screen material attached to the roller assembly, and a plurality of raised features. Edges of the screen material extend into the first slots. The raised features are attached to each of the edges of the screen material. The raised features are configured to engage the screen edge retention features and retain each of the edges of the screen material at least partially within the first slot of each of the two jambs.

A fenestration system includes one or more of a light modulation controller or ventilation modulation controller. The light modulation controller is in communication with at least one light modulation element of a fenestration assembly having a frame and a panel. The light modulation controller includes a light prescription module configured to provide a specified light prescription for the building interior. A lighting difference module is configured to determine a prescription difference between the specified light prescription and ambient light. A dynamic light module of the light modulation controller operates the at least one light modulation element according to the prescription difference. The ventilation modulation controller is in communication with at least one operator configured to open and close the panel. A ventilation prescription module provides a specified ventilation prescription for the building interior, and a dynamic ventilation module implements panel closing and opening according to the specified ventilation prescription.

A screen assembly for a fenestration unit having a frame and a window sash, the screen assembly including a screen assembly frame having a first side member, a second side member, and an upper member, and a screen housing extending between the first side member and the second side member of the screen assembly, the screen housing having a first housing member and a second housing member, wherein the housing forms a screen retention space between the first and second housing members when the screen assembly is in a closed position, a screen positioned between the first and second housing members when the screen assembly is in the closed position, the pleated screen including a first end coupled to the first housing member and a second end coupled to the second housing member, and a catch element extending from the housing and configured to be coupled to the window sash.

A window frame 10 and shown in phantom beyond the window frame are window wings 11 and 12. Fitted to the window frame is a fly screen frame 13 having a fly screen 14 filling the frame 13. A portal 15 is located below the midline of the screen and has a fixed frame section 16 fitted to the screen 14 and a moveable frame section 17 shown in a fully open position. Controls, in this case a handle and latch 18 can be seen through the fixed frame 16.

An insect netting for a greenhouse has folded and unfolded conditions, the latter in which the netting forms first and second walls which meet each other at a corner portion. The netting comprises a plurality of bellow sections. Each bellow has a first bellow portion and a second bellow portion The first bellow portion comprises a first strip along the first wall and a second strip along the second wall which are fixed to each other through a first seam at mutual rims of the first and second strips of the first bellow portion which face each other at a corner portion. The second bellow portion is similarly constructed. The first seam and the second seam of the first and second bellow portions have different locations at the corner portion as seen in a direction perpendicular to a plane in which the bellow section lies in the folded condition.