The present invention relates to a ventilation module with a biological system for purifying indoor and / or outdoor air in an environment. The module includes a box, and the box includes first (2) and second (4) walls facing each other, at least one of the first and second walls including a thin plate made of a light transmitting material. 1 (2) and second (4) walls； a pair of side walls (6), each connected to the first (2) and second walls (4) to close the box laterally A pair of matching side walls (6)； a base (3) and a lid (5), each connected to the pair of side walls (6) and to the first (2) and second (4) walls A base (3) and a lid (5) for closing the box at the bottom and top, respectively； and a purification chamber (30) in which the biofilter (10) purifies the incoming airflow (A) entering the module (1) A purification chamber (30) arranged for； two air intake openings for introducing the air flow that needs to be purified into the purification chamber (30) (8 ′, 8 ″), each of the openings (8 ′, 8 ″) being formed in one of the first (2) and second (4) walls, respectively. (8 ′, 8 ″)； an exhaust opening (9), the exhaust opening (9) adapted to allow the purified air flow (P) to flow out of the module into the purification chamber (30)； including. The module further includes a heat exchanger and is arranged to receive air from the two intake openings (8 ', 8 ") and to allow the air flow to exit from the heat exchanger toward the purification chamber. The invention also relates to a related method of ventilation of an environment and the biological purification of indoor air in this environment and / or outdoor air introduced into such an environment. The modules and methods described in the present invention are preferably used advantageously in residential, business, industrial buildings and accommodations for both new buildings and renovation of existing buildings； the present invention is used in contaminated areas Is particularly suitable. [Selection] Figu
