Climate and humidity
Humid, cold, dry, and mixed climates can change whether latent transfer is useful.
Keep the climate note attached.ERV/HRV planning worksheet
Heat Recovery Ventilator Sizing Worksheet
How do I size an HRV or ERV? Heat recovery ventilator sizing worksheet for ERV HRV ventilation by climate, humidity goal, outdoor-air CFM, occupancy, filtration, duct route, filter access, and service clearance before fresh air equipment review. This fresh air ventilation systems worksheet keeps HRV sizing chart inputs and current model documents attached.
Heat Recovery Ventilator Sizing Worksheet: Heat recovery ventilator sizing worksheet for ERV HRV ventilation review, HRV sizing chart inputs, sizing an HRV, outdoor-air CFM, fresh air ventilation systems, climate, humidity goal, occupancy, duct route, filter access, service clearance, and current model documents. The result organizes product, document, and request details; it does not choose a final model.
Updated 2026-06-25 ERV latent review HRV sensible review CFM fresh air target Filter service path
Result use
Recommended next step
The output helps decide what to ask next for fresh air ventilation systems. Code compliance, recovery, and certification remain project-specific.
Airflow target
ERV/HRV selection needs outdoor-air CFM context before equipment comparison.
Planning CFM value.Filter and access
A unit that cannot be serviced cleanly can fail in operation even if airflow looks right.
Confirm maintenance access.Recovery matrix
ERV HRV Matrix
| Project condition | Project facts | Equipment family | Review note |
|---|---|---|---|
| Humid cooling season | Humidity goal, CFM, filter, drain/access notes | Fresh air and ERV systems | Latent transfer should be checked |
| Cold heating season | Outdoor design context, indoor humidity, frost/access notes | ERV/HRV review | Match recovery type to climate |
| Occupied classroom or office | Occupancy, CFM, sound, filter access | Fresh air and ERV systems | Sound and service access matter |
| Gym or active space | Peak occupancy, humidity, odor, filtration | ERV plus dehumidifier review | Moisture and ventilation may need both paths |