Air Change Calculator
Welcome to our Air Change Calculator, tailored for professionals undertaking abatement projects or other commercial work. This tool is designed to help you determine the precise air flow necessary for any project space or work area. Simply input the space's dimensions and your desired air changes per hour, and the calculator will deliver the cubic feet per minute (CFM) needed to achieve your project's air quality standards. If you don't know your ACH required, use our table below as a reference point for engineering recommended ACH based on the building you're working in.
Once you have your CFM, navigate through our curated collection of premium air scrubbers and negative air machines, each annotated with their respective CFM. This ensures a seamless match to your project's specific requirements. We're here to streamline your selection process, offering the best solutions for optimal air cleanliness.
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ACH Recommendations
The data presented in the table below are suggestions only. Consult local government, OSHA, or EPA for official requirements.
| Building / Room | Recommended ACH | Building / Room | Recommended ACH |
|---|---|---|---|
| All spaces in general | 5 min | Arcades | 12-16 |
| Assembly halls | 6-8 | Attic spaces for cooling | 12 – 15 |
| Auditoriums | 8 – 15 | Bakeries | 20 – 30 |
| Banks | 5 – 10 | Bank Vaults | 6 |
| Barber Shops | 10 – 14 | Bars | 20 – 30 |
| Beauty Shops | 18 24 | Bedrooms | 4 – 8 |
| Boiler Rooms | 15 – 20 | Bowling Alleys | 14 – 20 |
| Cafeterias | 12 – 15 | Casino (non smoking) | 14 – 18 |
| Casino (Smoking) | 20 – 30 | Classrooms (ART) | 16-20 |
| Classrooms (ages 5 and up) | 12 – 16 | Classrooms (science lab) | 16 -20 |
| Classrooms (shop classes) | 16 -20 | Churches | 8 – 15 |
| Cigar Lounges | 20 – 30 | Club rooms | 12 |
| Clubhouses | 20 – 30 | Coin-operated dry cleaner | 24 -20 |
| Coin-operated laundries | 11-13 | Cocktail Lounges | 20 – 30 |
| Computer Rooms | 8 -12 | Commercial dry cleaner | 24 -30 |
| Commercial Laundry | 22-26 | Conference Roomos | 5 – 8 |
| Court Houses | 4 – 10 | Day Care (ages up to 4) | 14- 18 |
| Dance halls | 16-20 | Dental Centers | 8 – 12 |
| Department Stores | 6 – 10 | Dining Halls | 12 -15 |
| Dining rooms (restaurants) | 12 | Dress Shops | 6 – 10 |
| Drug Shops | 6 – 10 | Dry Cleaners | 6 – 20 |
| Engine rooms | 4 – 6 | Factory buildings, ordinary | 2 – 4 |
| Factory buildings, with fumes or moisture | 10 – 15 | Fast Food | 12 – 14 |
| Fire Stations | 4 – 10 | Food Processing | 10 – 25 |
| Foundries | 15 – 20 | Galvanizing plants | 20 – 30 |
| Garages repair | 20 – 30 | Garages storage | 4 – 6 |
| Health Club | 20 – 26 | Homes, night cooling | 10 – 18 |
| Hookah | 20 – 30 | Hospital rooms | 6 – 10 |
| Kitchens (commercial) | 15 -30 | Kitchens ( residential ) | 8 -14 |
| Laundries | 10 – 15 | Libraries, public | 5 |
| Lunch Rooms | 12 -15 | Luncheonettes | 12 -15 |
| Nightclubs | 20 – 30 | Machine shops | 6 – 12 |
| Malls | 6 – 10 | Meat Processing | 20-26 |
| Medical Centers | 8 – 12 | Medical Clinics | 8 – 12 |
| Medical Offices | 8 – 12 | Mills, paper | 15 – 20 |
| Mills, textile general buildings | 5 | Mills, textile dye houses | 15 – 20 |
| Money Counting room | 8 – 15 | Municipal Buildings | 5 – 10 |
| Museums (Childrens) | 12 -15 | Museums / Galleries | 10-14 |
| Nail Salons | 18 -24 | Offices, public | 5 |
| Offices, private | 5 | Photo dark rooms | 10 – 15 |
| Pharmacy Prep | 8 – 10 | Pig houses | 6 – 10 |
| Pet Shops | 12 – 14 | Photo Studios | 6 – 8 |
| Police Stations | 5 – 10 | Post Offices | 5 – 10 |
| Poultry houses | 6 – 10 | Precision Manufacturing | 10 – 50 |
| Public Retail Stores | 6 – 10 | Pump rooms | 5 |
| Residences | 4 – 6 | Restaurants | 8 – 12 |
| Retail | 6 – 10 | School Classrooms | 4 – 12 |
| Shoe Shops | 6 – 10 | Shopping Centers | 6 – 10 |
| Shops, machine | 5 | Shops, paint | 15 – 20 |
| Shops, woodworking | 5 | Smoking Lounges | 20-30 |
| Substation, electric | 5 – 10 | Supermarkets | 8 – 10 |
| Swimming pools | 20 – 30 | Town Halls | 5 – 10 |
| Taverns (non smoking) | 14-18 | Taverns (Smoking) | 20 – 30 |
| Theaters | 8 – 15 | Transformer rooms | 10 – 20 |
| Turbine rooms, electric | 5 – 10 | Vape Shop | 20 – 30 |
| Warehouses | 6 – 30 | Waiting rooms, public | 5 |