The team assesses the property first, because sizing a ducted system off a guess is how people end up with something underpowered or overspending on capacity they don't need. That means measuring up the floor area and ceiling heights, checking insulation and which way the windows face, and factoring in how many people are living there — all of which change the heating and cooling load. The roof space gets a proper look too: whether there's safe access, enough room to work, how the trusses run, what's already up there, and where condensate drainage can go. Electrical capacity, switchboard requirements and outdoor unit placement are all confirmed before anything's ordered or booked in.