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ADF(1) Appendix C

Completion Checklist & Commissioning Sheet

VENTI commissioning tool — complete on site, download as Building Control certificate

Property & System Details

Installation Address

Dwelling Parameters

ADF(1) para 1.20: Whole-dwelling minimum rate = higher of the bedroom-count method (Table 1.3) and the floor-area method (0.3 l/s/m²). Both are calculated automatically.

1.3 — Installation Engineer

1.4 — Commissioning Engineer

Controls

Units / Systems Installed

Select each VENTI unit installed. Add as many rows as required.

2a — Installation Details

Installed per manufacturer's requirements?
ADF(1) paragraphs 1.74–1.87 followed?Duct type, length limits, insulation, bends, static pressure, external terminals
Any deviations from paragraphs 1.74–1.87 — documented?

2b — Visual Inspection

Background ventilator quantity and equivalent area meets ADF(1)?Natural vent: 8,000mm² per habitable room / kitchen (multi-storey), 10,000mm² (single-storey). Continuous MEV: 4,000mm² per habitable room. N/A for MVHR — para 1.72 prohibits background ventilators.
All background ventilators left in open position?
Correct number and location of extract terminals — satisfy Table 1.1 or 1.2?
Installation complete — no obvious defects?
Internal doors have sufficient undercut?10mm above floor finish or 20mm above bare floor surface (para 1.21)
All protective packaging removed (including from background ventilators)?
All systems clean internally and externally?
System installed to allow maintenance access and component replacement?

2b.3 — Start-up & operation checks

At initial start-up: any abnormal sound, vibration or unusual smell?
During continuous operation: any excessive noise?

Ducted systems — continuous MEV / MVHR additional checks

Parts 3b and 3c systems. Leave blank for natural ventilation (Part 3a).
Appropriate air terminal devices installed to allow system balance?
HRU and all ductwork effectively insulated and sealed?
Condensate connection complete and draining correctly? (MVHR / srMVHR only)
Filters installed?
Ductwork installed to minimise air resistance and leakage?

Commissioning Equipment

ADF(1) requirement: Device and hood calibrated together within 12 months at a UKAS-accredited centre. Accuracy ±5%. Calibration range must cover at least 4 l/s through maximum design rate. This single entry covers all Part 3 measurement sheets.
Device model & serial numberUKAS calibration dateCertificate no.

Report always outputs l/s per Approved Document F

Part 3a — Intermittent Extract Fan Testing

ADF(1) Table 1.1 minimums auto-populate on room selection. Pass = measured ≥ design rate. Measure over ≥10 seconds.
Room typeADF(1) min.Design rateMeasuredStatus

Part 3b — dMEV Commissioning

High rate minimums from ADF(1) Table 1.2 (auto-populated on room selection). Total continuous rate must meet whole-dwelling minimum.
Room typeADF(1) high min.Measured highStatusMeasured cont.
Total continuous rateWDV →0.00 l/s

Part 3c — Centralised MEV / MVHR / srMVHR

Extract terminals

Room typeADF(1) min.Design highMeasured highStatusDesign cont.Measured cont.
Total extract continuousWDV →0.00 l/s

Supply terminals (MVHR / srMVHR — leave blank for MEV / dMEV)

Room typeDesign highMeasured highDesign cont.Measured cont.
Total supply continuous———0.00 l/s

Declaration & Review

Complete the form to see a summary here before generating the record.

Engineer's Declaration

By generating this record, I confirm that the ventilation system at the above address has been installed, inspected, tested and commissioned in accordance with Approved Document F, Volume 1, Appendix C, and that the measured airflow rates are as recorded.

Fields marked * are required. The PDF is suitable for Building Control submission.

Appendix C Commissioning Certificate

Approved Document F, Volume 1 — ventilation commissioning record

VENTI Appendix C Commissioning Tool v1.4.0

Last Updated on 28 April 2026 by Bradley Pallister

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