![]() ![]() Check to make sure that furniture or storage is not blocking the return air grille if it is located low on a wall.Sometimes poor circulation is due to the lack of a properly sized (low pressure) return air path back to the air handler. Here are a few upgrades that can improve circulation and air distribution coverage, allowing the system to operate closer to design for better performance and efficiency. Once ductwork is installed and trapped behind drywall and other finishes, it is very difficult to make changes. ![]() Figure 1. A constant airflow regulator is a modulating orifice that automatically regulates airflows in duct systems to constant levels. An unbalanced, ducted HVAC system can result in wasted energy and poor thermal control. Pressure testing as part of a whole-house energy assessment can determine whether the house is pressures are unbalanced. ![]() One cause of these problems could be pressure differences between rooms. In existing homes, homeowners may sometimes experience strong drafts, temperature differences between rooms, poor air circulation, or central forced air systems that seemed to be noisier or working harder than they need to. ![]()
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