When I last had to replace a line set, the tech said that if the line has been open to the elements for a prolonged period of time, particularly during high humidity, that there's a fair chance that enough water vapor and whatnot has gotten into the condensor that there will be problems down the road.

Especially baths with showers where humidity levels are high, and wet feet alone can swell joints and ruin it in a quick hurry.

The low humidity may be compounding whatever is causing an allergic reaction for you.

I rooted for BU just for you and Bryan (LOL) to no avail.What I remember about Fl. is the England AFB area and the swamps, snakes, gators and August humidity ....that was a different time LOL Well, at $45 a foot they aren't buying at Lowes that's for sure.

It also depends on the climate as any water damage in high humidity or warmer climate can also cause damage to the laminate..

Also told this is a signal that it has humidity issues that could cause mold or other problems in the house.

We are in humid South Carolina, in the dead of summer but the high temps are scheduled to be about 90 this week.. not sure about humidity. 

He makes big bucks doing this for insurance companies.The paint is porous and the humidity draws out the smell through the new paint.

Even in California which has very low humidity compared to where I live.

The second cause is high indoor humidity, thats why if you have a whole house humidifier the recommended humidity setting is lower the lower your expected outdoor air temperature is, to prevent condensation.