Insulated masonry door
Over 80% of masonry fireplaces installed in the corner of a room do not follow standards and are very dangerous. For a quick evaluation, check with a flashlight to make sure that the last section of chimney inside the house is at an angle. If so, your fireplace is legit.
To fix this problem, we can install an access door that will allow the sweeper to complete his work. It is important to remember that only an insulated masonry register can be used for this type of work, because any other type of trap door will push the smoke inside the room.