Advanced ERV Design Calculator

How This ERV Calculator Works

This advanced ERV calculator uses both ASHRAE ventilation standards and CO₂-based calculation to determine fresh air requirements.

ASHRAE Formula

Fresh Air (CFM) = (People × CFM/person) + (Area × CFM/sq.ft)

CO₂ Formula

CFM = People × 0.01076 × 1000000 ÷ (Indoor CO₂ – Outdoor CO₂)

Result Selection

The calculator selects the higher airflow value for accurate HVAC design.