Should I leave fan on continuously in an Open Foam Insulated Hous
We just built a one story 3000 Sqr Ft home and had it insulated with Open Cell insulation including the roof. The heat Pump is 16 SEER 2.5 ton Bryant we were given brand new from a friend. We keep the thermostat at a constant 74 degrees at all times.
We live in South Carolina where the day time lately has been in the 80's and at night in the 50's and 60's.
The house is so tight that when we change the two filters at the intake it sucks the filter in pretty hard if the system is on.
My question is should we turn just the fan on at night when the temperature drops below 74 degrees to bring in the cold air and then shut if off once the outside air reaches 74 degrees?
Because this house is so tight, do I need to do anything different with my heating and Air?