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Air Changes per Hour: 15×12×8 ft room at 800 CFM

Specific conversion page with reference context, calculator, and nearby values.

Author

Dr. Lars Eriksson

HVAC editorial contributor

Swedish environmental economist from Stockholm School of Economics, advisor to the EU on carbon pricing policy

Reviewed by

Prof. Rajesh Sharma

HVAC content reviewer

Indian agricultural economist from IARI New Delhi, advising governments on food security under climate change

Last updatedFebruary 22, 2026

PublishedFebruary 22, 2026

On this page

  1. Value details
  2. Calculator
  3. Nearby reference values
  4. FAQs
  5. Methodology and review
  6. Navigation and related conversions

15×12×8 ft room at 800 CFM converts to

33.33 ACH

Use this as a quick reference for Air Changes per Hour.

Value Details

Input: 15×12×8 ft room at 800 CFM

Output: 33.33 ACH

Browse all reference values for Air Changes per Hour

roomVolumeFt3: 1440 | cfm: 800

ACH Calculator

Calculate ACH from airflow or find required airflow from target ACH.

ACH Result

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Nearby Reference Values

Air Changes per Hour values near 15×12×8 ft room at 800 CFM
ScenarioACHRoom Volume (ft³)
15×12×8 ft room at 100 CFM4.17 ACH1,440
15×12×8 ft room at 200 CFM8.33 ACH1,440
15×12×8 ft room at 300 CFM12.5 ACH1,440
15×12×8 ft room at 400 CFM16.67 ACH1,440
15×12×8 ft room at 600 CFM25 ACH1,440
15×12×8 ft room at 800 CFM33.33 ACH1,440
20×15×9 ft room at 100 CFM2.22 ACH2,700
20×15×9 ft room at 200 CFM4.44 ACH2,700
20×15×9 ft room at 300 CFM6.67 ACH2,700
20×15×9 ft room at 400 CFM8.89 ACH2,700
20×15×9 ft room at 600 CFM13.33 ACH2,700

Frequently Asked Questions

Common questions about Air Changes per Hour, formulas, and expected usage.

What is ACH in HVAC design?

ACH means air changes per hour and indicates how many times the room air volume is replaced each hour.

How is ACH calculated?

ACH = (CFM × 60) / room volume in cubic feet.

Can I calculate required CFM from target ACH?

Yes. Rearranging gives CFM = (ACH × room volume) / 60.

Is higher ACH always better?

Not always; target ACH depends on occupancy, use type, comfort, and energy goals.

Methodology and Review

This page is generated from the same conversion definition used by the main calculator page, which keeps the calculator, reference table rows, and FAQ schema aligned.

Reviewer and update metadata are shown above and included in structured data. See our editorial policy, review process, and corrections policy.

Use this page as a fast lookup reference, then confirm final project values using applicable standards and manufacturer documentation.

Previous15×12×8 ft room at 600 CFM Next20×15×9 ft room at 100 CFM

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