Start with which system serves the room
Laguna service requests should identify the exact address and whether the equipment serves the whole property or a defined zone. This matters when a home or business has more than one thermostat or multiple outdoor units.
For a no-cooling or no-heat call, note which unit runs and which does not. For a replacement, ask for the electrical, duct and control scope to be listed separately so estimates can be compared on equal terms.
For ductless mini-splits, bring multiple thermostats and clear scope into the scope discussion. Compare a dedicated system for the problem room with modifications to existing central ducts. For multi-zone proposals, ask what happens when only one small room needs conditioning and how the controls coordinate operation.
