I would check the local papers/websites down here...
www.stardem.com
www.delmarvanow.com
I know when ffemtreed moved down a month ahead of me I found those were best tools for job searching. I think there were some ads for HVAC in the stardem this past Sunday.
Anyway.. I know where I work in Cambridge,
MD is always hiring for different positions. I'll PM you the info ... it might be worth a call.