Precision Manual D Duct Design
Maximizing Proper Airflow
A perfectly sized HVAC unit (from Manual J and Manual S) is only as effective as the ductwork delivering the air. The Manual D (Duct Design) calculation determines the precise size, layout, and components needed for every branch of your system. At Right Foot Design, we engineer a quiet, efficient duct system that delivers the conditioned air exactly where your Manual J requires it, guaranteeing balanced temperatures and comfort throughout your home.
The Hidden Value of Professional Manual D Design
Eliminate Hot/Cold Spots: Ensures that every room receives the correct volume of air needed to meet its specific load requirement.
Reduce System Noise: Proper duct sizing and component selection prevent excessive air velocity, reducing whistling and fan noise.
Lower Operating Costs: An efficiently sized and laid-out duct system minimizes static pressure, allowing the fan to work less, thereby reducing energy consumption.
Maintain Equipment Longevity: Reduces strain on the air handler, extending the life of your entire HVAC system.
Components Included in Our Manual D Report
Calculated Duct Sizes: The precise diameter or rectangular dimensions for all supply and return runs.
Friction Loss Analysis: Detailed calculation of resistance to ensure proper airflow and pressure.
Balanced Airflow Chart: A room-by-room breakdown of the required Cubic Feet per Minute (CFM) for both heating and cooling.
Why Duct Design is Essential for Energy Compliance
Modern energy codes increasingly require detailed documentation of duct design to prove the air delivery system meets minimum efficiency standards. Our Manual D is your essential proof that the installed ductwork will not impede the performance of your HVAC equipment.