ᐅ What pressure difference (Pa) is typical for mechanical ventilation systems with heat recovery?

Hello everyone,

In our new build, we will have a mechanical ventilation system with heat recovery, but we would also like to install soundproof doors. There are special drop seals designed to improve sound insulation while allowing air circulation. I’m not sure if posting links is allowed here, but if you search for "Planet Mine-S," you’ll find relevant information quickly.

According to the manufacturer, any airflow can pass through; only the pressure difference in Pascals changes. For the smaller version, the following is specified for a door width of 1050mm (41 inches):

Airflow m³/h --> Pa
20 m³/h --> 2 Pa
26 m³/h --> 3 Pa
31 m³/h --> 4 Pa

Since our door is only 860mm (34 inches) wide, I reduced the airflow by 20%. So, 2 Pa is reached already at 16 m³/h.

Our rooms are calculated with 20 m³/h airflow, while the bathrooms are calculated with 44 m³/h. This results in pressure differences of 3 Pa and 9 Pa, respectively. There is also a larger version of the drop seal, which brings these values down to 2 Pa and 6 Pa.

These values don’t help me much, and the manufacturer suggests a rough rule of thumb: the smaller Mine-S is sufficient up to 60 m³/h, and above 60 m³/h, the Mine-V should be used.

What are reasonable values to consider, and what should be the maximum value to use? What disadvantages come with higher values?

The mechanical ventilation system is from Kermi.

Thanks in advance for your help.

Hello M. Gerd, have you made any progress with your considerations?