Bob evaluated the home for airflow which is important for those hot/cold rooms. His crew was polite and   explained a few things of what was being done. Dust had been a real problem  at the home but these guys did a great job of sealing the system. Dust is noticeably less; probably cut down on my dusting to once a month instead of  weekly.  AC was installed during winter; can’t wait to see how the cooling does with no leaks and better air flow.