Central controlled residential ventilation with heat recovery: Are rooms individually controllable?

  • Erstellt am 2015-04-23 11:59:13

Dogma

2022-09-15 16:36:46
  • #1
I connected and programmed this to my DDC for the home control. But it would also work with a simple E4 or Logo control.

P.S. The speeds adapt to the scenarios. For example, bathroom light on = increase exhaust fan speed with a 5-minute delay and a 10-minute overrun when the light is turned off again, or if the fireplace is on then switch the range hood from exhaust to recirculation mode and increase the overpressure in the house (in addition to the always slight overpressure). Just to name a few things.
 

i_b_n_a_n

2022-09-15 16:51:50
  • #2
I find it super interesting even though I currently don't need it. What disadvantages would there be to installing the measurement and control options at the air distributor instead of at the outlet or inlet? Between them is only a defined amount (meters) of [Kontrollierte-Wohnraumlüftung] pipe. I am just thinking about it and realize that there are some hurdles to overcome. The total volume flow is always the same. If I throttle one branch now, the others automatically get more. So depending on the throttling (position of the throttle valve), I would have to regulate down.
 

Dogma

2022-09-15 19:38:25
  • #3
If you install the throttle valves directly at the distributor, that’s also okay and would actually bring no disadvantages or advantages. Since I don’t have an air distribution box myself, but rather have the supply and exhaust outlets in a row, that was the only way possible for me.

You are right about the total volume flow. It is always the same; the air finds the path of least resistance. I have three options for this.
1. I reduce the volume flow via a PID controller when I change the amount of air in a room and don’t want supply and exhaust air anywhere else.

2. I use my insulated attic as a buffer (which is always ventilated anyway)
3. a combination of 1 and 2
 

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