Many times the exhaust from your furnace or air conditioner can come through your attic, but that is not always the case. You may find that there is a small hole in your ceiling from a pipe or vent that needs to be repaired. You can use this hole to your advantage to get rid of the exhaust problem that you have in your attic. You will need to determine if you have a problem with your attic vents or if it is a simple pipe that needs to be repaired.
When a pipe is leaking, you will want to have it repaired as soon as possible. If the leak is not going to affect the structure of your home, you may want to try and fix it yourself. If the leak is serious, you should call a professional to take care of the issue. These types of leaks are very dangerous and should be addressed by a professional. A professional can correctly diagnose the problem and figure out the best way to fix it. You do not want to risk a severe accident just because you do not know what you are doing.
If you live in an old house with a concrete slab your attic may be unprotected. Your home may still be new and could potentially have concrete on the floor. If this is the case, you should contact a professional who will fix the damage. This is not something you want to get wrong and the contractor will go over all of the steps necessary to make sure you do not do it again. If you attempt to patch the area yourself, you run the risk of leaving permanent damage and possibly even cause the ceiling to collapse. Your ceiling is important and you should only touch it with extreme caution. It is important to learn about proper attic ventilation to avoid expensive problems.