Oh well, now that the renovation has reached the darkest parts of the house (basement), I'm finding one cozy surprise after another... 
The house is drained by the previous owner with Platon on the outside (no insulation) and pictures show that it's done "seriously" and dug all the way down to the footing with drainage pipes and gravel at the bottom along with geotextile fabric, so it looks correct...
Now I removed two old cabinets that served as my tool cabinets over the years, and the back and underside of them were anything but pleasant, completely black and fuzzy with mold. The cabinets are thrown out and the wall has been brushed/sanded and cleaned with bleach, so far so good.
However, the plan is for new cabinets... There was also an exhaust for mechanical ventilation built in behind the cabinets (so no air has been able to come out there, but it draws air now that it's opened).
I can get supply air into the room with a bit of effort, so my idea is to make a hole in the wall and get in one of those "flat" ventilation ducts, which I then run down to the floor and behind the new cabinets (which will be placed a bit away from the wall) and then make holes at regular intervals in the duct running along the floor.
The idea is that the exhaust draws air and fresh air comes in and is drawn up along the wall behind the cabinets.
Now the question, I'm wondering if it will provide enough air circulation or if the risk is that there won't be enough negative pressure if the room doors are open and no air is "drawn" on the backside of the cabinets. Also, I'm wondering if there are pipes narrower than 50mm anywhere, I would prefer to have something like 30mm to get the cabinets closer to the wall.
The house is drained by the previous owner with Platon on the outside (no insulation) and pictures show that it's done "seriously" and dug all the way down to the footing with drainage pipes and gravel at the bottom along with geotextile fabric, so it looks correct...
Now I removed two old cabinets that served as my tool cabinets over the years, and the back and underside of them were anything but pleasant, completely black and fuzzy with mold. The cabinets are thrown out and the wall has been brushed/sanded and cleaned with bleach, so far so good.
However, the plan is for new cabinets... There was also an exhaust for mechanical ventilation built in behind the cabinets (so no air has been able to come out there, but it draws air now that it's opened).
I can get supply air into the room with a bit of effort, so my idea is to make a hole in the wall and get in one of those "flat" ventilation ducts, which I then run down to the floor and behind the new cabinets (which will be placed a bit away from the wall) and then make holes at regular intervals in the duct running along the floor.
The idea is that the exhaust draws air and fresh air comes in and is drawn up along the wall behind the cabinets.
Now the question, I'm wondering if it will provide enough air circulation or if the risk is that there won't be enough negative pressure if the room doors are open and no air is "drawn" on the backside of the cabinets. Also, I'm wondering if there are pipes narrower than 50mm anywhere, I would prefer to have something like 30mm to get the cabinets closer to the wall.
In the summer, there is a risk that humid outdoor air enters and condenses on the cold wall. The problem is probably that the wall behind is not heated by the room. I think it's enough to place the cabinets on legs and leave a gap at the top.
Both the wall and the floor are cold because it's an uninsulated slab on grade. I'm currently laying tile on the floor...
The exhaust air in the room will then draw warm air from adjacent rooms, and the exhaust vent is directly above the "problem corner," so hopefully, a sufficient amount of air will also be drawn up behind the cabinets...
The exhaust air in the room will then draw warm air from adjacent rooms, and the exhaust vent is directly above the "problem corner," so hopefully, a sufficient amount of air will also be drawn up behind the cabinets...
When we build cold rooms, we often leave a 10 cm gap between the wall and wall for ventilation. Alternatively, we place a heating cable between the walls so that thermics bring warm air to draw out moisture. So my advice is to mount the cabinets at least 5 cm away from the wall and either ventilate or heat.