Home Details Needed for a Wrightsoft Load Calculation

Accurate residential load calculations begin with the home's dimensions and room layout.

Floor plans should identify room sizes, conditioned areas, ceiling heights, exterior walls, and the locations of windows and doors.

Wrightsoft's Right-Draw capabilities help the designer represent building geometry used in the calculation.

Section cuts and elevations can help identify ceiling configurations, building heights, and areas adjoining attics, garages, crawlspaces, or other unconditioned spaces.

For existing homes, additional measurements may be needed when plans are unavailable, incomplete, or not drawn to scale.

Wrightsoft requires information describing the thermal characteristics of the building enclosure.

Relevant details include wall and roof construction, insulation levels, ceiling assemblies, foundation types, and floors adjoining unconditioned spaces.

The designer must distinguish among slab-on-grade, basement, crawlspace, and other floor conditions where applicable.

Construction drawings, energy compliance documents, and specifications should be compared when they provide conflicting information.

Windows and exterior doors affect heating and cooling loads through heat transfer, solar gains, and applicable air leakage assumptions.

Important window information includes dimensions, orientation, U-factor, solar heat gain coefficient, and shading conditions.

Window schedules and manufacturer information are useful sources for these inputs.

When exact product information is unavailable, assumptions should be identified and evaluated rather than represented as verified specifications.

The calculation requires appropriate outdoor heating and cooling design conditions, indoor design temperatures, and project-specific information affecting the loads.

Location, elevation, building orientation, and applicable code or permitting requirements may influence the design inputs.

The designer should use appropriate climate data and confirm jurisdiction-specific requirements where applicable.

Not every permitting authority uses identical design criteria or requires the same Manual J documentation.