
Yea, what a useless ass. If that’s the kind of people they employ I wouldn’t want that shitty company back in my house.
The condensate drain needs to be drained out of the house, like any other drain.
There are condensate pumps (very small, like a large aquarium pump) for moving condensate up high enough to reach a proper drain (such as the one for your washing machine).
Simply capping off the existing drain is simple laziness. Fuck that guy.





If that crawl space is a dirt floor and not concrete, that soil is going to continually provide a moisture source.
I’d seal that opening with some plastic to create a vapor barrier (tape it around the ducts and to the wall or framework). Anything more solid will generate noise from the ductwork vibrating against it.