In late September when the weather started cooling down here in Surrey BC Canada, we started to see morning condensation on our windows (newly installed last year):
My wife and I and our son sleep in the room, so presumably it is due to our breathing. I should double-check the humidity in the room when it happens again tomorrow, but I think it is about 60%. We do have a dehumidifier, but we find it too noisy to run during the night (even with a timer), so we just run it after we wake up.
- Is the humidity/condensation in the windows and walls a concern for mold growth, or is it sufficient to run the dehumidifier after we wake up and rely on the sun to dry up the windows?
- How to prevent excessive humidity/condensation in the bedroom? It is cold, so we don't want to leave our windows partially open all night. And the dehumidifier is too noisy for us to run during the night. Would a silent moisture absorbing product like DampRid help? I heard that it won't help much.
I read that the key to solving humidity problems is improved ventilation. But how to improve ventilation in a bedroom with a closed door? The bathroom fan won't help because the door is closed. Opening a window won't work because it is cold outside. Is our only option an expensive Heat Recovery Ventilator that will vent to the outside while conserving heat? But aren't those as noisy as a dehumidifier?
I saw a similar question here (Why does significant condensation gather on my bedroom windows overnight?) but it just suggests opening the windows, using a dehumidifier, keeping the blinds open, putting bubble wrap on the windows (won't solve moisture getting into the walls though), and not worrying about it.