Calculate HVAC duct sizes using the constant friction method. Input airflow or dimensions to determine duct sizes, velocity, and friction loss. Supports rectangular, round, and oval ducts with adjustable air temperature and pressure.






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Calculate HVAC duct sizes using the constant friction method. Input airflow or dimensions to determine duct sizes, velocity, and friction loss. Supports rectangular, round, and oval ducts with adjustable air temperature and pressure.











Perform detailed heating and cooling load calculations for residential buildings directly in the field. This app offers comprehensive data for various construction types and allows for unlimited project storage and room-by-room analysis. Reports can be generated and emailed as PDFs or spreadsheets.