Skip to content

Financing from 0% APR · Vetted installers in 48 states

Back to planning tools

Solar heat gain calculator

Peak BTU/hr through glass with exterior shading factor — use before specifying screens or horizontal blinds.

Estimated peak heat gain

6300 BTU/hr

≈ 1846.4 kW thermal — sizing reference for HVAC and fabric openness.

Assumptions & next step

  • - Single-hour peak estimate using SHGC and incident irradiance.
  • - Shade factor aggregates openness, placement, and user operation behavior.
  • - Does not replace full energy model, orientation study, or HVAC design.

Related: Screen configurator · Horizontal blind