Not really. We kept the thermostat lower to keep the electric bills down and our great room/dining room with the vaulted ceiling was always colder than anywhere in the house. But we also did not have any cold air returns in any of the rooms. That is why we had all new duct work put in the house and cold air returns installed in the ceilings in all the rooms. We were hoping to be able to keep it a little warmer with a little lower electric bills by going with the 18 SEER system.