Begin with a validated example and a suitable weather file, then replace geometry, constructions, schedules, and systems systematically. Check warnings and energy balances before comparing alternatives. Keep occupancy and operating assumptions visible in reports, since apparent savings can reflect changed inputs rather than a better-performing design.
This is best suited to building-performance specialists evaluating energy scenarios. Before committing a larger project, account for these trade-offs: input preparation can be complex; results depend heavily on schedules and assumptions.