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Get an HVAC person to go into the apartment to assess the damage and repair it if necessary. If the HVAC has been intentionally damaged, then you may elect to file a separate lawsuit against the Tenants for damages.
You need to make it clear to the Court that you just need to reclaim the legal possession. However, that you may elect to file a separate lawsuit against the Tenants for destroying your HVAC. That the Tenants have been troublesome and you just want them to leave so that you can reclaim the apartment, fix it and find suitable Tenants for the premises. You need tell the Court all the things that the Tenants have done including using space heater, which puts your property in danger of house fire; refusal to put their names on the electric bill, etc.