Restrictive stamped face registers
High flow registers
A super easy check every homeowner can do is to simply check what kind of registers you have on the ceilings and walls. Believe it or not the style of register you have has a huge impact on how effectively your heating and cooling runs.
Restrictive supply registers will cause your air to back flow through the ductwork creating imbalances and overworking the AC unit. A restrictive return grille or register will not bring enough return air into the system (or enough out of the other side), starving the unit of air.
How often do we find these restrictive registers during our APS and SRP home energy audits? More often than you think, about 8 out of 10 homes have a restrictive return grille. 4 out of 10 homes have restrictive supply registers.
Stamped faced registers have fixed or semi-fixed grilles that are "stamped" on. The grilles are characterized by smaller openings that are at sharp angles almost parallel to the floor. They not only restrict the airflow out of the the register, but they can't be adjusted to redirect the air.
High flow registers aka bar type grilles or opposing blade dampeners have fewer grilles, are spaced out less frequently and are sometimes fully adjustable. They let a significantly more amount of air to pass through, making your heating and cooling system work less to keep the home at a comfortable temperature and humidity.
By simply switching your registers you can achieve greater comfort with higher airflow's into and out of the system.