the room r and stale air to be exhausted into the attic a where it is then vented to the outside atmosphere through the vent v depending on the adjustment of the automatic temperature responsive vents 10 they can be entirely closed when a preselected temperature is not reached or can be opened a desired degree to permit ventilation even if the preselected temperature has not been reached in a typical installation one automatic temperature responsive vent 10 would be placed in the ceiling of each room adjacent to an attic so that each room would have an equal opportunity to have the contaminated and or undesirable air vent therefrom through the attic to the outside atmosphere with reference to fig2 through 4 the vent 10 is seen to include a frame 12 and a flap 14 the flap 14 is pivotally affixed to the frame 12 by a pair of pivot rods 16 that are integrally formed with the flap 14 and which journal in apertures disposed in the frame 17 in a conventional manner the frame 12 has a central passage 18 disposed therethrough which is selectively blocked by the flap 14 depending upon its position relative to the frame 12 as it pivots on the pivot rods 16 the frame 12 has the central passage 18 thereof covered by a grille 20 to form an exposed appearance as shown in fig4 which is similar to that of conventional vents.