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We live in Oklahoma with mild winters and hot summers. The house is built on a slab foundation and the exterior is entirely brick with a typical asphalt shingle roof. We have 12 ft ceilings in all the living areas and the master bed, bath and closet. The master bed, bath and closet are the problem areas. There are quite a few windows - one or more in every room and the master bath has a lot of ceramic tile - the floor, around the tub and the entire shower. I'm certain this contributes to the heating problems but it's even hot in the summer. The heating and cooling unit has been placed in the attic and was installed horizontally. The plenum faces the west end of the house - opposite the master bed, etc. We have been able to successfully regulate the rooms from the center of the house to the west end, but the eastern rooms are very difficult. The duct work was done with flexible tubing. We have ceiling fans in many rooms and have tried using those to increase circulation but that doesn't seem to help. As an example of how bad it can get ... in a recent evening, it was around 45 degrees outside, the thermostat was set on 74, the centrally located kitchen and family room area was 75 and the master bath was 68. The master closet is even colder. Is that information helpful? Thanks!
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