Building heating ventilation air conditioning equipment

The utility model discloses building heating ventilation air conditioning equipment which comprises a main body, an air volume regulator and a vibration reduction mechanism, a secondary air inlet is formed in the front face of the main body, a control box is fixedly connected to the right side of the main body, a noise reduction pipeline is fixedly connected to an air outlet of the main body through fixing bolts, and the noise reduction pipeline comprises a first cavity, a second cavity and a third cavity. A sound absorption material is arranged on the inner wall of the sound attenuation pipeline, a plurality of air inlet holes are formed in the inner wall between the first cavity and the second cavity, and the third cavity is arranged on the right side of the second cavity. According to the building heating, ventilation and air conditioning equipment, after airflow enters the silencing pipeline, one part of the airflow enters the third cavity from the second cavity, the other part of the airflow enters the f