ᐅ Experiences with decentralized controlled residential ventilation systems?
Created on: 27 Apr 2015 09:47
J
jx7Hello everyone!
Does anyone have experience with decentralized mechanical ventilation with heat recovery (e.g., Lunos or Aereco) that they can share?
I am considering whether the extra cost of a central mechanical ventilation system with heat recovery is worth it. The heat recovery probably won’t save more than €5000 in heating costs even over 20 years, but does a decentralized system work just as well? What about issues like the noise level of the fans or performance during strong winds? One disadvantage of older decentralized ventilation systems was the aesthetic impact on the facade due to too many ventilation openings, but nowadays there are more discreet options, such as ventilation through the roller shutter box.
I am familiar with the theoretical arguments for both systems (central vs. decentralized), but I’m genuinely interested in practical experiences from homeowners who have a decentralized mechanical ventilation system in operation.
Best regards,
Peter
Does anyone have experience with decentralized mechanical ventilation with heat recovery (e.g., Lunos or Aereco) that they can share?
I am considering whether the extra cost of a central mechanical ventilation system with heat recovery is worth it. The heat recovery probably won’t save more than €5000 in heating costs even over 20 years, but does a decentralized system work just as well? What about issues like the noise level of the fans or performance during strong winds? One disadvantage of older decentralized ventilation systems was the aesthetic impact on the facade due to too many ventilation openings, but nowadays there are more discreet options, such as ventilation through the roller shutter box.
I am familiar with the theoretical arguments for both systems (central vs. decentralized), but I’m genuinely interested in practical experiences from homeowners who have a decentralized mechanical ventilation system in operation.
Best regards,
Peter
J
JDoerbecker27 Apr 2015 20:43We installed a decentralized ventilation system from Ventomaxx. The vents are located on the exterior within the window reveals. This is a subtle solution that is very unobtrusive. A decentralized system is certainly louder than a centralized one, but with normal household noises, our system is not noticeable.
What I noticed after moving in: With strong wind, there are increased sounds. Therefore, during planning, it is important to ensure that the vents do not face the main wind direction.
If you can afford it, I think the decision should be based on your gut feeling. Both ventilation types definitely have their pros and cons.
Good luck with your decision; I have not regretted ours so far.
Best regards,
Joe
What I noticed after moving in: With strong wind, there are increased sounds. Therefore, during planning, it is important to ensure that the vents do not face the main wind direction.
If you can afford it, I think the decision should be based on your gut feeling. Both ventilation types definitely have their pros and cons.
Good luck with your decision; I have not regretted ours so far.
Best regards,
Joe
decentralized controlled residential ventilation – never again! We have an inverter system. Even at 25% power, it is still noisy and disturbing (fan noise).
In addition, there are wind noises as well as outdoor sounds. I can follow a loud conversation happening outside while inside.
The bedroom is only usable if the ventilation is turned off.
In addition, there are wind noises as well as outdoor sounds. I can follow a loud conversation happening outside while inside.
The bedroom is only usable if the ventilation is turned off.
Hello SirSydom,
I have installed quite a few ventilation systems by now, including many from Inventer, in apartments and houses. So far, no one has ever complained to me about the noise.
Especially in sleeping areas (bedrooms, children's rooms, guest rooms), I make sure that the fans can be switched off. For example, the controller itself (ZR8 controller) offers an option to reposition a tab so that at zero setting the system is turned off for up to one hour.
Additionally, if the system has a central control unit, a time relay can be installed per bedroom. Using a push button in the respective room, the fan can then be turned off separately for a set period. More recently, there is also a small module that fits into a flush-mounted box under the switch, allowing the fans to be turned off for 2, 4, or 8 hours.
If you find 25% noise to be loud and disturbing, in my opinion, there might also be an installation error.
The installation should proceed as follows:
1. Core drilling DN 230 (approx. 9 inches)
2. Insert the duct, fix it with wedges, foam it in (ensure a slight slope outwards)
3. Run cable (Jy(st)y 2x2x0.6 or Ölflex 4x0.75) from the controller to the fans. Or, if there is no fan to be switched off, wiring can be done in parallel.
4. Run cable (NYM-J 3x1.5) from the power supply to the controller
5. Connect terminals at the controller and the fans (the system should now operate)
6. Check rotation direction, mount internal and external hoods
Inventer also offers a type of closure flap that closes automatically due to external wind pressure. However, I haven’t installed these yet and have no experience with them.
Unfortunately, a problem with Inventer is the weak fan. It can generate about 20 Pa pressure (at full load). This is not sufficient to build enough counterpressure during stronger wind loads on the facade. In the worst case, the fans may simply stop running even though they are switched on.
I always try to install the fans on the side sheltered from the wind whenever possible.
I have installed quite a few ventilation systems by now, including many from Inventer, in apartments and houses. So far, no one has ever complained to me about the noise.
Especially in sleeping areas (bedrooms, children's rooms, guest rooms), I make sure that the fans can be switched off. For example, the controller itself (ZR8 controller) offers an option to reposition a tab so that at zero setting the system is turned off for up to one hour.
Additionally, if the system has a central control unit, a time relay can be installed per bedroom. Using a push button in the respective room, the fan can then be turned off separately for a set period. More recently, there is also a small module that fits into a flush-mounted box under the switch, allowing the fans to be turned off for 2, 4, or 8 hours.
If you find 25% noise to be loud and disturbing, in my opinion, there might also be an installation error.
The installation should proceed as follows:
1. Core drilling DN 230 (approx. 9 inches)
2. Insert the duct, fix it with wedges, foam it in (ensure a slight slope outwards)
3. Run cable (Jy(st)y 2x2x0.6 or Ölflex 4x0.75) from the controller to the fans. Or, if there is no fan to be switched off, wiring can be done in parallel.
4. Run cable (NYM-J 3x1.5) from the power supply to the controller
5. Connect terminals at the controller and the fans (the system should now operate)
6. Check rotation direction, mount internal and external hoods
Inventer also offers a type of closure flap that closes automatically due to external wind pressure. However, I haven’t installed these yet and have no experience with them.
Unfortunately, a problem with Inventer is the weak fan. It can generate about 20 Pa pressure (at full load). This is not sufficient to build enough counterpressure during stronger wind loads on the facade. In the worst case, the fans may simply stop running even though they are switched on.
I always try to install the fans on the side sheltered from the wind whenever possible.
How is it with wind noise? The one we have now chosen has metal cladding/covers on the outside—still bad in the wind?
We have already spoken to several owners; many say it is too loud, others that the air exchange rate is too low... but no one mentioned wind. At the ventilation office, the noise level on setting 1 was okay for sleeping, on setting 2 for living, higher than that was rubbish.
We have already spoken to several owners; many say it is too loud, others that the air exchange rate is too low... but no one mentioned wind. At the ventilation office, the noise level on setting 1 was okay for sleeping, on setting 2 for living, higher than that was rubbish.
I hadn’t heard of Sevi before either. I only came across their controllers by chance a few days ago and found them quite interesting. I can’t say anything about the noise level yet. I need to gather more information.
With Inventer, you can also add soundproofing mats, which make a bit of a difference.
As mentioned above...
When the fans are practically facing the wind, you can clearly hear the wind whistling in. The weather protection hood on the outside does block some of it, but during a “storm” the only real solution is to shut down the system.
Another thing to pay attention to is the size of the fans: While larger fans (DN200) may only need to run at low speed to achieve, for example, 20 m³/h (12 cfm), smaller fans (DN160) often have to run at much higher speeds to reach this output. This naturally results in considerable noise.
A planner friend once said in an interview: “A good ventilation system is one you don’t even notice is there!” I think he’s absolutely right.
With Inventer, you can also add soundproofing mats, which make a bit of a difference.
As mentioned above...
When the fans are practically facing the wind, you can clearly hear the wind whistling in. The weather protection hood on the outside does block some of it, but during a “storm” the only real solution is to shut down the system.
Another thing to pay attention to is the size of the fans: While larger fans (DN200) may only need to run at low speed to achieve, for example, 20 m³/h (12 cfm), smaller fans (DN160) often have to run at much higher speeds to reach this output. This naturally results in considerable noise.
A planner friend once said in an interview: “A good ventilation system is one you don’t even notice is there!” I think he’s absolutely right.
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