Start with the problem you want solved
Start with the concern you are trying to address: visible dust, odors, humidity, ventilation or discomfort.
Provo: planning the visit
For a rental or shared home, establish who controls the thermostat, who owns the equipment and who can authorize service. Tell the contractor which occupied rooms are affected and when the issue began. For a separate house, share the actual equipment details rather than assuming the neighboring building is comparable.
