From Home Details to Load Reports: The Wrightsoft Design Process

A Wrightsoft residential HVAC design begins with accurate information about the home. Floor plans, elevations, section cuts, window schedules, insulation specifications, and applicable design conditions provide the basis for the calculation.

Using Wrightsoft's drawing and building-input capabilities, the designer represents room dimensions, ceiling heights, exterior surfaces, windows, doors, and construction assemblies. The home's orientation and relationships between conditioned and unconditioned spaces must also be identified.

Incomplete or conflicting documentation should be reviewed before proceeding. Software calculations cannot compensate for incorrect building information.

Once the building information and design conditions are entered, Wrightsoft's Right-J calculation tools determine heating and cooling loads using ACCA Manual J methodology.

The results include room-by-room and whole-house heating and cooling requirements. Cooling calculations also distinguish sensible and latent loads where applicable.

The designer reviews the results for unusual values, inconsistent construction assumptions, orientation errors, and other potential input problems. Corrections to the building model may require recalculating the loads before proceeding.

After completing Manual J, the calculated loads support ACCA Manual S equipment selection. Manufacturer performance data must be evaluated at applicable design conditions to determine whether proposed equipment satisfies the heating and cooling requirements.

For ducted systems, room airflow requirements and selected equipment performance support ACCA Manual D duct design. Wrightsoft's Right-D tools assist with duct sizing based on airflow, available static pressure, duct geometry, fittings, and resistance.

Manual J, Manual S, and Manual D are related procedures, but each addresses a different part of residential HVAC design.

Wrightsoft can generate documentation showing calculated loads and other design information, depending on the modules and reports used.

The designer should review the reports for consistency with the project drawings, construction specifications, selected equipment, and intended duct design.

Permit submissions may require different forms or supporting documentation depending on the jurisdiction. Generating a report does not independently establish that every permit requirement has been satisfied.