Tools
Ventilation, CFM, Fan Size, and Air Curtain Calculators
Start with a calculator result, then carry the same room, doorway, duct, moisture, voltage, and document details into product selection.
Calculator Choices
Pick the exact calculator
Choose the closest calculator first. The calculator page owns the calculation; the next page carries the same inputs into a guide, product family, or document request.
Calculator routing The tools page routes CFM, fan size, bathroom fan, dehumidifier, air curtain, ERV/HRV, ACH, and duct pressure tasks to exact calculators before product documents.
| Buyer task | Inputs to collect | Tool | Next page |
|---|---|---|---|
| Ventilation calculator, CFM calculator, or fan size calculator | Use room area, ceiling height, target ACH, room use, source condition, and duct path before choosing fresh-air, exhaust, or duct fan equipment. | Ventilation CFM Calculator | Ventilation CFM Chart |
| Bathroom fan calculator or bathroom exhaust fan CFM calculator | Use bathroom area, ceiling height, duct length, elbows, termination, moisture level, and sone target before exhaust fan selection. | Bathroom Fan CFM Calculator | Bathroom Ventilation |
| Dehumidifier sizing calculator or commercial dehumidifier sizing | Use area, current RH, target RH, temperature, moisture source, drainage, duty cycle, and service clearance before dehumidifier model selection. | Commercial Dehumidifier Sizing Calculator | Dehumidifier Size Chart |
| Air curtain sizing calculator | Use finished door width, clear opening height, mounting height, traffic, voltage, and heated preference before comparing air curtain sizes. | Air Curtain Sizing Calculator | Air Curtain Size Chart |
| CFM to ACH calculator | Use known airflow, room area, and ceiling height when the task is converting a CFM value into air changes per hour. | CFM to ACH Calculator | Ventilation CFM Chart |
| Duct fan static pressure calculator | Use target CFM, duct size, length, elbows, filters, grilles, termination, sound target, and service access before checking fan-curve data. | Duct Fan Static Pressure Calculator | Duct Fan Selection Guide |
| Heat recovery ventilator sizing / ERV HRV worksheet | Use outdoor-air CFM, climate, humidity goal, occupancy, duct route, filter access, and service clearance before fresh-air system selection. | Heat Recovery Ventilator Sizing Worksheet | ERV vs HRV Guide |
| Ceiling mounted air curtain selection | Use ceiling opening, recess depth, finished width, mounting height, service access, controls, voltage, and photos. | Air Curtain Sizing Calculator | Ceiling Mounted Air Curtain |
| Restaurant ventilation CFM | Use dining room, restroom, service corridor, storage, or kitchen-adjacent room volume, source condition, exhaust path, sound target, and duct route. | Ventilation CFM Calculator | Restaurant Ventilation Systems |
| Ceiling exhaust fan selection | Use room size, ceiling location, duct length, elbows, termination, sound target, controls, and service access. | Bathroom Fan CFM Calculator | Ceiling Mounted Exhaust Fans |
| Gym or fitness center moisture | Use peak occupancy, activity load, fresh-air target, humidity source, temperature, drainage, odor, filter path, and service access. | Commercial Dehumidifier Sizing Calculator | Fitness Center Ventilation |
| Office or classroom fresh air | Use room list, occupancy, area, ceiling height, fresh-air CFM or ACH target, filtration, sound target, duct route, and service access. | Ventilation CFM Calculator | Office Space Ventilation Fans |
| Bathroom fan calculator | Use bathroom area, ceiling height, duct length, elbows, termination, moisture level, and sone target. | Bathroom Fan CFM Calculator | Exhaust Fan Sone Ratings |
| ERV HRV ventilation | Use climate, humidity goal, room use, occupancy, filter expectation, duct access, and service clearance. | Heat Recovery Ventilator Sizing Worksheet | ERV vs HRV Guide |
| Inline cabinet fan pressure | Use target CFM, duct diameter, straight length, elbows, filters, grilles, termination, service access, and access-side constraints. | Duct Fan Static Pressure Calculator | Cabinet Centrifugal Fan |
Calculator limits Calculator output summarizes project facts for a first check. Product data, installation conditions, code requirements, and current model documents still control final selection.