I'm not sure if this is an HVAC issue, but I'm looking for advice and welcome all opinions. Sorry for being so long...
I have a 2000sq ft ranch house in Wisconsin that is about 2.5 years old. The house also has a full basement (just one open room, cement floors, poured cement walls, totalling another 2000 sq ft).
Last winter was my first winter in the house, and there was a significant amount of condensation on the windows when the outside temperature dropped below 35F. At 0F, I would experience dripping levels of condensation from all windows.
When I called my builder (the house was then under warranty) I was told it was just the new house drying out, and to turn on my furnace fan (to run at all times) and run all ceiling fans/bath vents/etc. Additionally, I bought 2 humistats, and found the humidity levels to hover in the 55-70% range throughout the house.
So winter #2 is starting, and the Wisconsin weather has had a few nights in the 30's, and again I'm experiencing some condensation on the windows...not dripping yet...but it's also not that cold yet. My humidiy levels are holding between 55 and 75% depending on cooking/showers/etc.
I have no visible water in my basement or anywhere but the windows...but obviously I have a ton of humidity. I have a small (30 pint) de humidifier that I've had on for a few days. It fills in about 1.5 days, but doesn't seem to be having a great effect on the overall humidity levels. Additionally, I've tried putting it in both the basement and kitchen (so both levels) - and it doesn't seem to matter much. Given, this is way too little de humidification for the size of my house...but before I got buy a bigger one (finally), here's some questions:
Instead of getting a larger stand alone dehumidifier, is anything made that can attach right to my furnace? (home depot wasn't very helpful with this, since they don't carry anything like this) Is this an unusual request/question - or a normal occurance (so any HVAC contractor would know what I need?)
While the above might solve my excess humidity issue - I still am kind of wondering where it's coming from. Can anyone offer an opinion about the house still 'drying out'? I was told 3 years, which seems pretty unlikely to me? I'm also kind of wondering about my cement basement...this might be the wrong forum...but could I be getting excess moisture from my large, poured walled basement? If so, would painting/sealing solve it?
Again, sorry for questions outside of the norm, but thanks for the advice. Jeff