Air pressure control unit for room in building lowers pressure for health benefits and includes fan with butterfly valve activated by programmed control unit depending on barometer readings

摘要

The air pressure control unit for a room in a building has a fan (2) with a butterfly valve (1) activated by a programmed control unit (4). The action of the butterfly valve depends on barometer (3) readings so as to maintain a lowered pressure in the room. The lowered pressure simulates the effect of living in a mountain resort at high altitude.