Ventilation System Commissioning
Part F Commissioning Certificates are issued for Building Control sign-off after MVHR Commissioning and Bathroom Extractor Fan Testing.
We test and commission the following ventilation
system types:
Single Point Fans – Bathroom/Kitchens/Utility
Bathroom fans should extract a minimum of 15l/s intermittently, and kitchen and utility fans should extract a minimum of 30l/s. These extractor fans should run for a minimum of 15 minutes.
MEV System – Continuous Extract
MEV fans should continuously extract 13l/s from the kitchen and 8l/s from the bathroom and ensuite. Ensure the trickle vents above the windows are occasionally opened to introduce 'make-up air.'
Heat Recovery System – MVHR
The property's rooms should experience the correct number of air changes, which is 0.5 on boost mode. If Part O is part of the design strategy, then you would need to set up the purge airflows.
How much does it cost to balance and commission an MVHR system?
Commissioning an MVHR system costs £385 excl. VAT for homes up to 350SQM. Larger homes take more time to commission and cost slightly more. This is because the engineer must spend more time walking back and forth between the rooms and the unit to make the required adjustments, ensuring every part of your home receives the right amount of ventilation.
A ventilation commissioning certificate will be issued as part of the price.
We test bathroom, kitchen and utility fans to ensure they extract the correct air volume. The Part F Building Regulations changed in 2021 and now state that utility room extractor fans should extract at 30l/s.
You can download a copy of the building regulations here (download)
Have you completed the commissioning checklist before booking an engineer?
1. Do you have the correct airflow rate minimum requirements for the property?
2. Is the ventilation system 100% complete, and does it power up when you turn on the switch?
3. If it’s an MVHR system that is going to be commissioned, has the condensate drainage pipe been fitted on the correct side of the unit?
4. Is the property clean, and is the MVHR unit accessible?
5. Is there access to the air valves in the various rooms?
6. Are the boost switches in place, and have the external air vents been fitted?
After commissioning your MVHR system you should ensure that you service your system regularly. Click here to learn more about MVHR servicing
Office
Studio 7, Richmond Road Studios, 119 Richmond Road, Kingston Upon Thames, KT2 5BX.