HEATING VENTILATION AND AIR CONDITIONING UNIT FOR CONDITIONING AN AIR FLOW, WITH AT LEAST ONE AIR TREATMENT DEVICE AND A HOUSING FOR SUCH AN HEATING UNIT

The present invention relates to a Heating Ventilation and Air Conditioning (HVAC) unit (1) for conditioning a flow of air, with at least one air treatment device and a housing for receiving said at least one air treatment device (5), the housing having a housing wall with a defined removable wall part (10) located between a first (20) and a second (30) determined score line, the first (20) and the second (30) determined score line providing a guide for cutting the housing wall to allow removal of the removable wall part (10), wherein the at least one air treatment device (5) and the removable wall part (10) are mutually positioned to allow access to the at least one air treatment device (5) from the exterior of the HVAC unit (1) after removal of the removable wall part (10).