Hello,
we have a detached single-family house with a controlled residential ventilation system with heat recovery (HRV) from Vallox.
I am generally satisfied with the system, but I suspect that something might not be executed optimally in one area.
The system is installed in the attic, and the two ducts for supply and exhaust air run from there to the roof. What surprises me is their position. Both outlets are on the same side of the roof, spaced no more than 2 meters (6.5 feet) apart.
According to the installer, this is always done this way. However, I find that hard to believe, as the short distance between the air outlets is likely to cause exhaust air to be drawn back into the supply air intake, isn’t it?
This could also explain why strong cooking odors frequently spread to the upper rooms (bedrooms) after cooking.
Does anyone have an opinion or suggestion on whether this setup is correct?
Since everything is located in the attic, it would be relatively easy to distribute the ducts to both sides of the roof. However, I would like to avoid the effort if, in your opinion, it would not bring any improvement.
Many thanks in advance,
Ingo Lenz
we have a detached single-family house with a controlled residential ventilation system with heat recovery (HRV) from Vallox.
I am generally satisfied with the system, but I suspect that something might not be executed optimally in one area.
The system is installed in the attic, and the two ducts for supply and exhaust air run from there to the roof. What surprises me is their position. Both outlets are on the same side of the roof, spaced no more than 2 meters (6.5 feet) apart.
According to the installer, this is always done this way. However, I find that hard to believe, as the short distance between the air outlets is likely to cause exhaust air to be drawn back into the supply air intake, isn’t it?
This could also explain why strong cooking odors frequently spread to the upper rooms (bedrooms) after cooking.
Does anyone have an opinion or suggestion on whether this setup is correct?
Since everything is located in the attic, it would be relatively easy to distribute the ducts to both sides of the roof. However, I would like to avoid the effort if, in your opinion, it would not bring any improvement.
Many thanks in advance,
Ingo Lenz
M
merlin66722 Jul 2013 15:01It should generally be sufficient; an impact could occur if the wind blows from the exhaust air to the fresh air intake or if the connections are poorly oriented (exhaust air blowing toward the fresh air intake). (Exhaust air runs from the room to the device, supply air from the device to the room).
What honestly concerns me more, especially with the current outdoor temperatures, is a very warm outdoor air intake (the roof heats up quite a bit). However, this depends on your specific conditions. In our case, the accessory intake and exhaust elements are about 0.5 meters (1.6 feet) apart, but the air is exhausted straight out and drawn in horizontally and shallowly, so separation is maintained and no "short circuit" occurs.
What honestly concerns me more, especially with the current outdoor temperatures, is a very warm outdoor air intake (the roof heats up quite a bit). However, this depends on your specific conditions. In our case, the accessory intake and exhaust elements are about 0.5 meters (1.6 feet) apart, but the air is exhausted straight out and drawn in horizontally and shallowly, so separation is maintained and no "short circuit" occurs.
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