 Smoke flap vents are designed to allow for adequate indoor heating especially where indoor fireplaces are present, as well as to regulate steam, smoke and heat pressure output in devices such as chimneys, stoves, or boilers.Smoke flap ventilation is used on tipi (teepee') housing of the Native America Plains Indians by tradition, both historically and on modern ceremonial tipis.The tipi smoke flap vent is attached in a continuous piece to the cured hides that cover the exterior of the large teepee housing structure.