Odds are good, yours is, tooOdds are good, yours is, too
If the kids left the door ajar with the air-conditioning running, you’d close it. If the windows were open and it grew too chilly, you’d shut them. If a tree crashed through your roof, you’d get it fixed.
So you’d probably be surprised to learn that your home has a gaping hole — or its equivalent, made up of hundreds or even thousands of tiny points of ingress and egress, where air flows in or out.