I'm considering installing gas logs. I have the option of vented or ventless. I'm leaning towards vented, since these are mainly for aesthetics, I have a working chimney, and my wife is sensitive to the smells of ventless logs. However, I'm concerned about running gas logs and forgetting to open the damper. Carbon monoxide!
I understand that there are devices called damper clamps, which will force my damper to always be open far enough to be safe. Obviously, though, this will open my house to the outside air. Is it possible to quantify how much effect this will have?
Also, as a bonus question, can things (insect, birds, bats, reindeer, what have you) get into my house through an open damper?