Approved document F (ADF) and L (ADL) relates to the means ventilation and the conservation of fuel and power within the regulations.
Effective from the 1st of October 2010, today they are applicable to all plans submitted and approved under the 2010 building regulations in England and Wales.
Approved Document F (ADF) 2010 – Means of Ventilation
Section two of Approved Document F sets out the relevant legal requirements published under the building regulations for means of ventilation and stipulates that:
There shall be adequate means of ventilation provided for people in the building.
Fixed systems for mechanical ventilation and any associated controls must be commissioned by testing and adjusting necessary to secure that objective referred to in item 1 is met.
From October 2010 domestic ventilation became ‘notifiable work’ as part of Approved Document F 2010 (ADF). Stringent regulations have been introduced and it’s crucial that domestic ventilation systems are installed, inspected and commissioned to the current standards to maintain compliance and system efficiency.
The requirements differ to previous regulations in that there is now a requirement as part of the above stipulations to:
- For all mechanical ventilation systems where they can be tested and adjusted they must be commissioned and the results/ measurements of the air flow rates must be recorded and reported to Building Control within a specified time frame.
- Commissioning must be undertaken on intermittently used extract fans and Cookerhood as well as continuously running systems.
- Sufficient information must be provided about the building’s ventilation system and the maintenance requirements for the occupant and this must be supplied no later than five days after the work has been completed.
The key aim of the requirement to have an adequate means of ventilation provided for people in buildings, is to ensure that under normal conditions, the property is capable of limiting the accumulation of moisture which can lead to mould growth and pollutants originating within a building which would otherwise become a hazard to the health of the people in the building.
In order to achieve this aim, Approved Document F stipulates the types of ventilation that must be used and the performance each type must meet by stipulating ventilation rates that must be achieved depending on the type of ventilation system used, the size of building, the number of wet rooms and how air tight the building has been built to.
The ventilation systems listed in Approved Document F (ADF) are:
System 1 Background ventilators and intermittent extract fans
System 2 Passive stack ventilation
System 3 Continuous mechanical extract (MEV)
System 4 Continuous mechanical supply and extract with heat recovery
In addition to the above, Positive Input Ventilation (PIV) may also be considered as an alternative system; however, it must demonstrate it meets the requirement of F1 by way of a BBA certificate.
More information on the types of ventilation and ventilation rates can be found in Section 4 and 5 of Approved Document Part F.
Part L 2010 – Conservation of fuel and power in new dwellings
Approved document L consists of four separate documents and addresses the energy efficiency requirements in the Building Regulations 2010.
The aim of the requirement is to deliver a 25% improvement from the 2006 regulations in the thermal performance and energy efficiency of buildings.
The requirement stipulates that:
Reasonable provision shall be made for the conservation of fuel and power in buildings by:
a Limiting heat gains and losses –
(i) Through thermal elements and other parts of the building fabric; and
(ii) From pipes, ducts and vessels used for space heating, space cooling and hot water services;
b Providing fixed buildings services which –
(i) Are energy efficient
(ii) Have effective controls and
(iii) Are commissioned by testing and adjusting as necessary to ensure they use no more fuel and power than is reasonable in the circumstances; and
It also stipulates that sufficient information about the building and the systems installed including maintenance requirements must be provided to the home owner.
How a building achieves the required efficiency is calculated using SAP 2009 and for ventilation this impacts on the Specific Fan Power (SFP). To find out more about SAP and the code for sustainable homes, visit our knowledge section.
Click here to download Approved Document Part L and review the full requirements.
Domestic Compliance Guide
To provide further guidance on how to conform to the revised regulations, in October 2010 the Domestic Ventilation Compliance Guide was also introduced.
The aim of the document is to provide guidance on the requirements in building regulations for the installation, inspection, testing, commissioning and provision of information when installing fixed ventilation system in new and existing dwellings.
The document provides guidelines on the following important elements that came into force with the 2010 regulations and we recommend that you familiarise yourself with these points and understand the requirements:
- The requirement to commission mechanical ventilation systems using the approved procedure and provide notice confirming commissioning to building control.
- The requirement to measure air flow rates as part of the commissioning process and provide notice of the data to building control.
- Installation guidelines for each of the approved systems (section 3)
- The requirement to provide sufficient information about the ventilation system and its maintenance requirements to owners and occupiers (section 4)
- Inspection checklist and air flow measurement test sheet (section 5)
Click here to download the Domestic Compliance Guide and find out more about conforming to the regulations.
Competent Person Scheme
Training and Assessment in Domestic Ventilation Systems 2010
As part of the changes to the above regulations, with effect from the 1st of October 2010, Installation Engineers must now be trained and registered with a relevant competent person scheme to test and commission ventilation systems on new build homes.
There is not a requirement for an installation company to have every installer qualified; however, there must be one competent person for every 10 installers. The competent person is responsible for the inspection and commissioning of mechanical ventilation systems. The inspection checklist that is required under the building regulations and detailed in the Domestic Compliance Guide must be completed and signed off by a competent person.
To become a competent person you must undertake the training with an approved provider/registered training centre. The training is a two day course with an exam where a 100% pass rate is required. Certification lasts for 5 years and a photo card is issued by the accredited scheme provider to all successful candidates.
Nuaire is a BPEC accredited training centre and now offers accredited ventilation installer training at our facilities in South Wales.