I don’t know about other services, but I’ve reached out to the same specialists at Ben’s Plumbing that I usually go to when I need plumbing repairs, pipe replacements, faucet installations, etc. Check this out https://bens.plumbing/services/hvac/mini-splits/, and you can consult with them about your issue, find out how much the work will cost. It’s just a service that covers a full range of work, from plumbing and pipes to ventilation systems.