citro wrote:I have problems with humidity (moldy laundry in the cupboards), feeling cold ... Winter and summer.
The permeability of my windows was estimated by a professional at 25m3 / h and the rooms were humid even when ventilated every day.
The VMC DF completely eliminated humidity and linen problems while improving the thermal comfort of rooms in the north.
Turning off the CMV in the summer would only return to the original situation.
Hello,
the permeability or rather air flow by leaks, is a function of the depressions, winds, and the flow of CMV posed with effects very function of the humidity outside and inside and temperatures and it can be greatly reduced by reducing the flow rates especially if outside it is hotter than inside, in summer or in garages, as in Bordeaux humid hot easily, because then all the humid air that enters condenses its humidity inside colder in huge quantities (real pool) and a VMC double flux regulates this humidity !!
I once observed this in a neighbor with too strong VMC with huge condensation and who accused me of having a water leak at my house above, in his shutter box which condensed all the incoming air, and it is difficult to convince the condominium of this error to avoid unnecessary work !!
On an old house, without VMC, and old windows, I did not have this wet problem, no molds for years in the cupboards, because weak flow and it could be that the cause is internal, walls sponges with humidity which goes back up without realizing it and the high-speed VMC only evacuates this intrinsic humidity to be removed !!
I had this type of problem in a high humidity apartment and the cause was the top neighbor's bathtub with slightly leaky joint (less than a liter per day leaving no trace but humidifying our apartment), and it took years to understand, with all the baths leaking in the building !!
A simple leak in a hidden pipe is enough.
It is easy to be mistaken about the real causes, especially with pro canvassers, especially gossip, who are paid to sell a very expensive max !!!
It is absolutely necessary to adapt the VMC flow to the minimum needs, and if this flow is greater than that corresponding to the respiration and uses of the inhabitants, it is necessary to seek and remove the causes such as wet walls and floors, very often the case in old houses .
Filters cleaned properly have no reason not to be effective enough, especially if you find their prices excessive and it is certainly more effective than not changing the filters often enough for lack of money or inattention !!.
The pressure drop pressure measurement gives an idea of the operation.
A layer of paper or other filter in front of the filter stops a good part of the particles and lengthens the life of the original filter.
This need to change filters often will not be met by most residents of BBC homes, for lack of care or money !!
Too many complex standards or obligations have the opposite effect from that desired!
Your major problem comes from there ...I live on the edge of a 2x2 lane.
