The purpose of the fireplace damper is to keep the outside elements, outside. The damper is opened only when there is a fire in the fireplace.
Yes, close the damper once all of the fire has died out. Leaving the damper open will cause warm air to be sucked up the flue, drawing in more cold air.
No. The flue must be open to allow the carbon monoxide to escape from the house.
Then you have a shortage of combustion air, and it is drawing air down the unused fireplace flue. Close the damper of the unused fireplace, and check for exhaust fans that may be drawing air out of the house.
There should be a louvered intake outside the fireplace, and a steel door covering the intake tunnel, inside the house located towards the front, and in the floor of the fireplace.
50-60% is usually a good rule of thumb.
If the damper should close while a fire is burning, all of the smoke will be coming out in the house- NOT a good thing. Most dampers have a hold-open device held in place by gravity.
High humidity outside and a leaky house. What are you measuring your humidity with? Is it reliable?
A dehumidifier will not cool the house but it will lower the humidity which will make the home feel cooler Like the old saying its not the heat its the humidity with a lower humidity you should be able to raise the temperature a couple of degrease and still feel comfortable
you go to the crystal room fireplace and if you already found out, when Violet told you, that is was an old house and many secret passageways are inside then go to that fireplace and it should say open and it will lead you to the dinging hall fireplace downstairs.
lower
depends where you are.. if you are in a desert... 0% if by an ocean, it could be 100%
My house is being redecorated. Where can I buy a good quality corner fireplace?
Clogged chimney, closed flue, or wind blowing into the fireplace.