Two-way hingeless ventilator

A hingeless ventilator, comprising:

• a frame assembly including a frame, a first upright sleeve and a second upright sleeve, the frame defining a pair of openings configured to allow passage of ventilating air therethrough, the first upright sleeve disposed between the openings and connected to said frame, a second upright sleeve spaced apart from said first upright sleeve and disposed between the openings and connected to said frame, each said upright sleeve defining an exterior track surface, one of the upright sleeves defining an outwardly extending guide stop, each said exterior track surface includes a first apex surface disposed between a first forward edge and a first rearward edge disposed opposite said first forward edge, said two edges defining a shape that tapers toward said first apex surface, each of said first forward edge and said first rearward edge defines a first lower indent disposed closer to said frame than to said first apex surface, each of said first forward edge and said first rearward edge defining a first middle indent disposed between said first lower indent and said first apex surface;
• a door assembly including a door, a pair of door struts, and a handle disposed to face the frame and defining a main body configured to be selectively positionable to cover and uncover both of the openings, the pair of door struts connected to the door, at least a first one of the pair of door struts extending through one of the openings in the frame, a Y-shaped cutout having an open-topped Y-shaped peripheral outline defined in at least the one door strut extending through the one of the openings in the frame, the guide stop extending through the Y-shaped cutout, the handle connected to the pair of door struts, each said door strut defining an elongated slot slidably receiving respectively one end of an axle, the door assembly also including rollers mounted on the axle and a spring biasing the axle along the slots so as to urge the rollers toward the exterior track surface, the rollers sized to be seated within the first lower indent and the first middle indent;
• and
• the door assembly being movable relative to the frame assembly guided by the rollers following the exterior track surfaces and the guide stop following the Y-shaped cutout.