Heat Recovery Ventilator Sizing Worksheet
ERV/HRV planning worksheet
ERV/HRV worksheet keeps project details together: climate, indoor humidity goal, outdoor-air CFM, occupancy, duct route, filtration, service access, controls, and model-document needs.
Heat Recovery Ventilator Sizing Worksheet: Compare ERV and HRV paths from climate, humidity goal, outdoor-air CFM, occupancy pattern, duct route, filter needs, and service access. Confirm current model documents before using the worksheet for product selection.Updated 2026-07-06
Before preparing the brief
ERV/HRV Inputs. Heat recovery ventilator sizing should start with climate, indoor humidity goal, building operation, and outdoor-air CFM, then move to duct route, filter access, service clearance, and current model documents.
- Capture climate, humidity goal, room type, occupancy, and outdoor-air CFM target.
- Identify whether humidity transfer, sensible heat recovery, filtration, or service access is the main concern.
- Keep duct path, drain or condensate expectations, filter access, and maintenance space visible.
- latent review
- ERV
- sensible review
- HRV
- fresh air target
- CFM
- service path
- Filter
Product selection
The output helps decide what to ask next for fresh air ventilation systems. Code compliance, recovery, and certification remain project-specific.
Using this result
Humid, cold, dry, and mixed climates can change whether latent transfer is useful.
Keep the climate note attached.
ERV/HRV planning result should enter fresh-air system selection with outdoor-air CFM, climate, duct route, filter access, service clearance, and current model documents together.