Identify the fuel and equipment before the visit
For Loomis requests, include the property access instructions and whether the heater uses natural gas, propane or electricity. The same symptom can lead to a different diagnostic path depending on the fuel and equipment design.
For a detached office or workshop, explain whether it already has heating, cooling and suitable electrical service. A ductless proposal should address the actual space and installation route rather than treating it as another branch of the house system.
For rooftop units, bring fuel type and detached spaces into the scope discussion. A failed component may justify repair; repeated faults or a major failure can justify a scoped replacement comparison. Include building interfaces and access costs so proposals cover more than the rooftop cabinet.