1, each kitchen is equipped with a flue inside, and the flue inside is also the main sub-division, and the main flue series is also connected to the entire building, and the secondary flue is also independent, will first to the secondary flue, and then from the holes and then will be entered into the main flue, so the home in the installation of the flue, the flue must be preserved, to prevent the emergence of the phenomenon of smoke backward or series of smoke.
2, trimming the floor reserved holes (large deviations notify the civil engineering side of chiseling), first of all, pop up the center line of the floor reserved holes, to the center line as a benchmark according to the size of the hole required to trim (if the installation of ventilation and exhaust ducts, ventilation ducts and exhaust ducts should be separated, the two direction and location of the ventilation is different).
3, need to install the backstop valve at the entrance to the public **** flue, then tighten the screws to fix the backstop valve, of course, the effectiveness of the backstop valve are to prevent fumes from backing up, the de-exhaust hood should be avoided around the installation of too many windows and doors, because too many windows and doors, air convection is too large, so that the fumes rise up to the range of the effective suction of the 250mm has been spread quite a lot.