Thermal Question About Heat Management
These kinds of vents are common. However, understand how they work: they suck out hot air that's in the attic, and that removed air needs to be replaced by air that enters from somewhere else. If your attic was built correctly, the make-up air enters through soffit vents. If your attic was built incorrectly or shoddily (which is common), the make-up air will be pulled from the inhabited part of your house. If this is happening, you need to air-seal the barrier layer (usually the ceiling) between the attic and the inhabited part of the house. In many houses there are a variety of ways for air in the house to leak into the attic:


Ducts or mechanical equipment located in the attic
Attic pull-down staircase door that has not been air-sealed
Bath vents that have not been air-sealed
Chimneys and flues that have not been air-sealed
Ceiling lights and electrical boxes that have not been air-sealed
Holes drilled in wall top plates for electrical wires that have not been air-sealed


All of those can let air in your house into the attic, causing the roof vents to pull air that you've paid good money to condition into the attic where it's not doing anyone any good.