Ventilation Testing

Ventilation testing ensures the air flow in your new-build dwelling meets Part F of the Building Regulations, providing a healthy indoor environment for occupants. As our homes become increasingly airtight to improve energy efficiency, proper ventilation becomes critical. UK Building Compliance provides BPEC-accredited ventilation testing from just £45 per dwelling, using UKAS calibrated equipment to verify that your ventilation systems are performing to the required standard.

What Is Ventilation Testing?

Ventilation testing measures the airflow rates delivered by a building's ventilation system to confirm they meet the minimum standards set out in Part F of the Building Regulations. The test verifies that extract fans, trickle vents, and mechanical ventilation systems are delivering the correct flow rates to each room in the dwelling.

As buildings are constructed to higher airtightness standards to meet Part L energy efficiency requirements, the natural movement of air through the building fabric is significantly reduced. This means that purpose-designed ventilation systems must work harder to maintain good indoor air quality. Ventilation testing confirms that these systems are properly installed, correctly commissioned, and delivering adequate fresh air to all habitable rooms.

Good ventilation removes moisture, pollutants, and stale air from the home. Without adequate ventilation, occupants face risks including condensation, mould growth, and poor indoor air quality — all of which can have significant health impacts, particularly for the elderly and those with respiratory conditions.

Why Do You Need Ventilation Testing?

The Building Regulations require that all residential new builds and many conversions undergo ventilation testing to demonstrate compliance with Part F. This regulation ensures that developers achieve the right balance between airtightness, energy efficiency, and healthy indoor air quality.

Without passing ventilation test results, building control cannot sign off your project. This means completion certificates, handovers, and property sales can all be delayed. The requirement is particularly important given the stricter airtightness standards introduced under the 2021 Part L amendments, which make purpose-designed ventilation even more critical.

Commissioning your ventilation calculations at design stage ensures that the correct ventilation strategy is specified from the outset. Ventilation testing then confirms at completion that the installed systems are performing as intended, giving building control and future occupants confidence in the indoor air quality of the home.

Our Ventilation Testing Process

UK Building Compliance makes ventilation testing straightforward. All our engineers hold BPEC accreditation and use UKAS calibrated equipment to deliver accurate, reliable results.

1. Scheduling — We coordinate testing to fit your build programme, often combining ventilation testing with air pressure testing on the same site visit to reduce disruption and cost.
2. Pre-test checks — Our engineer verifies that ventilation systems are installed, commissioned, and powered. Trickle vents, extract fans, and any mechanical ventilation systems must be in their final, operational state.
3. Flow rate measurement — Using calibrated flow hoods and anemometers, we measure the airflow rate at each extract point (kitchen, bathroom, utility, WC) and compare the results against the minimum flow rates specified in Part F and the approved ventilation design.
4. Whole-dwelling assessment — We calculate the building's overall ventilation standard rate and verify it meets the Part F requirements for the size and occupancy of the dwelling.
5. Certification — If your ventilation system passes, we issue the ventilation test certificate for building control submission. If any rooms fall short, we advise on adjustments to fan speed settings, ductwork, or trickle vent sizing to achieve compliance.

What's Included

• Part F compliant ventilation flow rate testing
• BPEC-accredited engineers with UKAS calibrated equipment
• Testing of all extract points (kitchen, bathrooms, utility rooms, WCs)
• Whole-dwelling ventilation rate calculation
• Ventilation test certificate for building control
• Guidance on adjustments if systems do not initially meet required flow rates
• Discounts for combination test packages with air tightness and sound testing
• Guide pricing from £45 per dwelling

Who Needs Ventilation Testing?

Ventilation testing is required for a range of residential projects:

• New-build dwellings — All new homes require ventilation testing to demonstrate Part F compliance before building control sign-off.
• Conversions — Properties being converted to residential use (including barn conversions and office-to-residential schemes) require ventilation testing where new ventilation systems are installed.
• Properties with mechanical ventilation — Dwellings fitted with mechanical extract ventilation (MEV) or mechanical ventilation with heat recovery (MVHR) require commissioning and testing to verify correct operation.
• Developments requiring airtightness below 5 m³/h/m² — Tighter buildings need more carefully designed and tested ventilation to compensate for reduced natural air infiltration.

Housebuilders, developers, architects, and self-builders all benefit from professional ventilation testing to ensure their properties provide a healthy living environment.

Why Choose UK Building Compliance?

UK Building Compliance has been providing ventilation testing for over 15 years, working with housebuilders and developers across the United Kingdom. Our engineers are BPEC-accredited and use UKAS calibrated equipment, ensuring every test is accurate, reliable, and accepted by building control.

We offer a complete building testing service, meaning your ventilation testing can be combined with air pressure testing, sound insulation testing, and SAP calculations in a single coordinated package — saving you time and money. Our combination test packages offer significant discounts compared to booking services individually.

Based in Hinckley, Leicestershire, we provide nationwide coverage with competitive pricing from just £45 per dwelling. Call us on 01455 242297 for a free quote.