CertBox
Energy Raters Create in CertBox

Blower Door Air Leakage Test Report

This report documents a whole-dwelling blower door test for energy code compliance — the test standard and equipment, dwelling preparation, the measured CFM50 and ACH50 against the adopted limit, and the pass/fail result. Under the 2021 IECC the limit is 5 ACH50 in Climate Zones 0–2 and 3 ACH50 in Zones 3–8, subject to state amendments.

IECC air-leakage testing requirements (R402.4.1.2 in the 2021 edition), ANSI/RESNET/ICC 380, ASTM E779/E1827Valid: One-off (per test)

No credit card required. Set up in 30 seconds.

Sample Blower Door Test certificate

Sample Blower Door Air Leakage Test Report certificate created with CertBox, showing the professional PDF layout with test standard and calibrated equipment, dwelling preparation checklist, cfm50 and ach50 results

Sample Blower Door Test with fictional data. All personal details shown are fake.

What it covers

  • Test standard and calibrated equipment
  • Dwelling preparation checklist
  • CFM50 and ACH50 results
  • Adopted ACH50 limit and climate zone
  • Dwelling-unit CFM50/sq ft path
  • Pass/fail result and air-sealing remarks

Who needs a Blower Door Test?

HERS raters
Energy auditors and BPI analysts
Builders and code officials
Weatherization contractors

Create your Blower Door Test with CertBox

1

Fill in the form

Pick Blower Door Test from the list, fill in the fields on your phone.

2

Compliance checks run

Built-in validation catches missing fields and out-of-range readings.

3

PDF generated instantly

Professional PDF ready to share via secure link or download.

Frequently asked questions about Blower Door Test

What ACH50 does the energy code require?
Under the 2021 IECC, dwellings must not exceed 5 ACH50 in Climate Zones 0–2 and 3 ACH50 in Zones 3–8. Attached dwelling units may alternatively show not more than 0.30 CFM50 per square foot of enclosure area. States frequently amend these limits, so the report records the requirement actually adopted for the project.
Who can perform the test?
The IECC requires testing by an approved third party — commonly a RESNET HERS rater, a BPI analyst or a jurisdiction-approved tester, using ANSI/RESNET/ICC 380, ASTM E779 or ASTM E1827.

Learn more

Browse all certificate types

Related certificates

HVAC Technicians

Duct Leakage Test

Create duct leakage test reports from your phone. Document CFM25 readings, leakage rates, and IECC compliance. For HERS raters and HVAC technicians.

HVAC Technicians

Manual J Report

Create Manual J load calculation reports from your phone. Document building data, design conditions, and load results. ACCA/IECC compliant.

Ready to create your Blower Door Test?

Free plan available. Set up in 30 seconds, no card required.

No credit cardCancel anytimeSet up in 30 seconds

Create your Blower Door Test in minutes