
Not an HVAC guy but I’m confused by your house, you have a basement and a crawlspace? Are they connected somehow? If the puddles in the crawlspace could be seeping into the basement then I’d say yes. Basements are known for being damp though, has there been a ton of rain?
Also your HVAC guy was really a jackass if he directed the condensation line into your crawlspace.
In the short term, fix the condensation line and maybe get a dehumidifier going in the basement. Those boxes will get moldy fast.
























I’d also strongly consider getting some sensors going in the basement and crawlspace to monitor the humidity and temp. You’d have real data and you can set an alarm level.