Hello friends,
I have now had the controlled mechanical ventilation with the Nibe FTX 239 W set up.
In the basement, the volume of a room was determined to be 95.3 m³ (3,364 ft³) with a factor of 1.5. The supply air (target) is 16 m³/h (9.4 cfm), but the measured value is 22 m³/h (13 cfm). What does the factor represent?
I’m puzzled because when I calculate properly, the air in the room is only exchanged after 6 hours (in the living room after 4.4 hours, volume 140.6 m³ (4,964 ft³), factor 3, supposed to be 31 m³/h (18 cfm), actual 32 m³/h (19 cfm)). Can this be correct? Or is there something wrong with the Nibe unit?
I have now had the controlled mechanical ventilation with the Nibe FTX 239 W set up.
In the basement, the volume of a room was determined to be 95.3 m³ (3,364 ft³) with a factor of 1.5. The supply air (target) is 16 m³/h (9.4 cfm), but the measured value is 22 m³/h (13 cfm). What does the factor represent?
I’m puzzled because when I calculate properly, the air in the room is only exchanged after 6 hours (in the living room after 4.4 hours, volume 140.6 m³ (4,964 ft³), factor 3, supposed to be 31 m³/h (18 cfm), actual 32 m³/h (19 cfm)). Can this be correct? Or is there something wrong with the Nibe unit?
Hello,
It is important during commissioning to use calibrated diffuser hoods.
Best regards
Krolock schrieb:The correct air volume flows can be found in the airflow plan according to DIN 1946-6 (nominal ventilation). These values are also considered in the heating load calculation. During the commissioning of the system, the specified values must be adhered to; otherwise, problems may arise in highly insulated buildings (KFW 55 and better).
... Could this be correct?
It is important during commissioning to use calibrated diffuser hoods.
Best regards