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.

Airflow Calculator

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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

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