Hello,
Recently bought a house built in the early '60s with a finished basement consisting of a guest room, recreational room, sauna, laundry room, etc., totaling about 90m3. I've started measuring the humidity down there, which fluctuates between 50-70% (peaking at 75% in one of the rooms farthest in where no one stays). Is this a good level during warm summer days? Do I need to improve the ventilation in the basement? Currently, there is no real ventilation solution other than large wall vents between some rooms. I can't see any mechanical exhaust vents, a couple of supply air vents. Burning in the stove in the recreational room drastically reduces the humidity by about 20% throughout the basement. There is absolutely no odor down there—not even a basement smell—but the plaster where the floor meets the wall has come off in some places. But perhaps that's normal for a 65-year-old house?
Do I need to ventilate better? If so, what is the best solution?
Best regards
Recently bought a house built in the early '60s with a finished basement consisting of a guest room, recreational room, sauna, laundry room, etc., totaling about 90m3. I've started measuring the humidity down there, which fluctuates between 50-70% (peaking at 75% in one of the rooms farthest in where no one stays). Is this a good level during warm summer days? Do I need to improve the ventilation in the basement? Currently, there is no real ventilation solution other than large wall vents between some rooms. I can't see any mechanical exhaust vents, a couple of supply air vents. Burning in the stove in the recreational room drastically reduces the humidity by about 20% throughout the basement. There is absolutely no odor down there—not even a basement smell—but the plaster where the floor meets the wall has come off in some places. But perhaps that's normal for a 65-year-old house?
Do I need to ventilate better? If so, what is the best solution?
Best regards
75% humidity is not that much this time of year, as we are currently at the beginning of the dog days.
What type of heating system is in the house?
Minimum "PAX" fans in the bathroom, toilet, laundry room.
In the long run (in a few years) considering an FTX system.
We currently have between 65-77% humidity in our basement, we have an FTX system that covers the whole house.
Outdoor humidity has been closer to 100% for at least half of the time over the past few weeks.
What type of heating system is in the house?
Minimum "PAX" fans in the bathroom, toilet, laundry room.
In the long run (in a few years) considering an FTX system.
We currently have between 65-77% humidity in our basement, we have an FTX system that covers the whole house.
Outdoor humidity has been closer to 100% for at least half of the time over the past few weeks.
We have a district heating boiler - water-radiated radiators upstairs and water-radiated floor heating in the basement. Radiator in the laundry room. Can you just connect a small mechanical exhaust vent in the laundry room and a couple of supply vents around in the basement? Like this one:Demmpa said:
https://www.bygghemma.se/kok-och-ba...LfhLm4o9sIkPKooAaosQYLInpJuQyDlxoCEsgQAvD_BwE
Addition: an opening for exhaust is already in the laundry room. Can you just install something that actively pulls out the air in the existing hole?