I would be concerned pumping 14 gallons a day into my old house that's for sure, it would be collecting as frost on windows, inside walls, all kinds of places you don't want it especially when outside temps warm up and it all melts. Hope your vapor barriers are in good shape. ( I suspect if they were, you would not need 14 gallons a day).
What vapor barriers? Believe it or not, house was built in 2000 and has NO vapor barrier.
Don't ask me why. I couldn't believe it either.
We don't get any water buildup anywhere I can see, except for in the bathroom windows after taking a shower, but that evaporates quickly. Never seen any water buildup on any of the other windows.
Last night after work I filled ALL four 2.5 gallon containers (after they were just filled in the morning). This morning I filled two of them but the other two were partially gone, but should be enough to make it till I get home today.
Maybe I shouldn't be putting so much water in the air, but if I don't our skin gets dry and itchy and the cats get zapped when trying to pet them.
It's not like I'm trying to keep it 60% RH or something. I don't see anything wrong with keeping humidity levels 35-40% in the winter, depending on how cold it is outside.
For the record, it's a log cabin A frame style house with loft. I'm heating ~3,200SF (30,000CF in volume) in total, including the basement. We have both humidifiers in the loft near the edge, so they are both in the center of the house in the complete open and seeing they are in the loft at the edge they are able to blow up and disperse throughout the house nicely.
It's my opinion the house was just not tightly constructed and the warm/humidified air is escaping and it's being replaced with cool/dry air. The rate at which this happens depends on the delta between inside and outside temps. There are numerous places where one can feel cold air entering near the tops of the vertical walls where it meets the "A frame"......all around. There are literally marks on the painted walls from this air passing over these spots over time (see photos below). The front closet is also un-insulated and cold as hell in the winter. The two short false walls in the loft are also cold to the touch. Sorry, I'm just venting...lol Just irritates me. House was built by my GF and her ex along with a group of their friends back when they were young. Proper insulation was the furthest thing from their young minds and neither of them are detailed orientated people. He was a concrete contractor, that should tell you something.....lol They did use those styrofoam-like forms though when pouring the basement walls, so those are well insulated.
EDIT: Added photos of "air stains". Hard to se in the photos, but those darker areas are not shadows.