Confirm source airflow
Start from reviewed load and equipment-selection context.
BPMS / BPMS Duct Sizing Builder
Manual D duct sizing software for residential HVAC design
BPMS Duct Sizing Builder
Manual D duct sizing and design software for reviewing airflow, available static pressure, effective length, fittings, friction rate and duct dimensions.
Built for field-to-report workflows
Build the duct network
Document runs, fittings, pressure assumptions and effective lengths.
Review and document
Check dimensions and flagged conditions before field handoff.
What you can do with BPMS Duct Sizing Builder
Room and system airflow
Organize design airflow requirements and supply/return distribution. Keep room requirements and total system airflow visible during design review.
Available static pressure
Review blower performance and pressure losses from applicable components. Establish the pressure available for the duct system using documented inputs.
Effective length and fittings
Include straight runs and fitting equivalent lengths in the network review. Fitting choices can materially change resistance and the available sizing choices.
Friction rate and duct dimensions
Review duct dimensions alongside airflow, pressure and friction-rate assumptions. Compare the proposed network rather than treating a single duct size as a complete design.
Velocity and distribution checks
Check velocity-related conditions and supply/return design context. Investigate flagged conditions and revise the design as required.
Schedules and review exports
Keep duct-design records and schedules organized for review and field handoff. Verify installed conditions and testing/balancing requirements independently.
Key use cases
Residential supply and return design
Use BPMS Duct Sizing Builder to support residential supply and return design with structured records, connected audit data, and clear documentation.
HVAC replacement duct review
Use BPMS Duct Sizing Builder to support hvac replacement duct review with structured records, connected audit data, and clear documentation.
Fitting and pressure-loss comparisons
Use BPMS Duct Sizing Builder to support fitting and pressure-loss comparisons with structured records, connected audit data, and clear documentation.
Duct schedule preparation
Use BPMS Duct Sizing Builder to support duct schedule preparation with structured records, connected audit data, and clear documentation.
Frequently asked questions
What does Manual D cover?
Manual D addresses residential duct-system design. Airflow, blower performance, component pressure losses, effective length and fittings all affect duct sizing.
Is a duct calculator enough to design the whole system?
A single-size calculation does not establish that the full supply and return network will perform as intended. Review the complete network and its pressure assumptions.
How do Manual J and Manual S connect to duct sizing?
Manual J establishes loads and room requirements; equipment selection establishes the operating context and airflow. Duct design uses those reviewed inputs to plan air distribution.
Can duct sizing replace field verification?
No. Design records must be checked against actual installation conditions, manufacturer requirements, applicable rules and testing/balancing results.
Continue your audit and HVAC design workflow
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See how this fits your team
Explore current plans and module availability, or request a walkthrough using your audit and HVAC design workflow.