Airflow Solutions main catalogue

What Fan and Where?

Building Regulations

Delivering Improvement

References in this catalogue refer to Approved Document F1: Means of Ventilation for England and Wales unless otherwise stated. Visit: www.planningportal.gov.uk/buildingregulations Please note that other documents apply specifying ventilation in Scotland, Northern Ireland and the Republic of Ireland. Scotland Refer to the Scottish Building Standards, technical handbook 2015 edition for domestic and non-domestic applications, Standard 3.14 Visit: www.scotland.gov.uk Northern Ireland Refer to the Building Regulations (Northern Ireland) 2014, Part K. Visit: www.dfpni.gov.uk Republic of Ireland Building Regulations, Techincal Guidance Document F:2009 Ventilation. Visit: www.environ.ie Scale of the challenge ● Existing buildings account for 42% of U.K green house gas emissions ● In 2050, 75% of housing stock will still predate the 2010 level ● In homes 82% of emissions are from hot water and heating Building Regulations England and Wales

Installed performance It is not sufficient to fit just any fan. It is important that the fan performs efficiently by extracting the minimum flow rate as required by the latest Building Regulations. The number of bends and the length of duct attached to the fan will create resistance to flow that must be overcome to ensure adequate extraction, known as installed performance. Fans should also be positioned to give an optimum flow of air through the whole room and to avoid pockets of residual air. The location of planned or existing door and window openings must be considered as well as sources of odours, stale air or condensation. Undercutting of doors or grilles may needed to be installed to allow air into the room, particularly with internal rooms which have no windows and tightly sealed doors. Fans should be mounted as high as possible, well away from primary heat sources such as gas water heaters and boilers. Domestic Ventilation Compliance Guide The 2010 Building Regulations introduced a "Good Practice" installation guide for fan installation, inspecting and commissioning new and existing dwellings. Consider this document as part of your specification. Don't forget a fan can only extract air if there is air coming in to replace it.

What Type of Fan Having considered the application of the ventilation required, it is important to select the correct type of fan to ensure that the requirement is truly met. However you should first consider which type of fan will best suit you to provide quiet efficient ventilation. Axial Fans are ideal for through the wall and window applications. Providing high performance with a slim profile, they are suitable for use with flexible ducting up to a maximum 1.5m length Mixed Flow Fans combine the convenience of a slim axial fan with the performance of a small centrifugal making them ideal for short duct runs Centrifugal Fans are quiet, powerful and suitable for wall and ceiling applications. They also work very efficiently against system resistance making them the perfect choice IEE regulations specify the installation of fans within bathrooms and showers by identifying a series of zones. IEE regulations must be adhered to for all electrical installations. Fans must be installed in accordance with the latest IEE Wiring Regulations 17th Edition (BS 7671:2008) +A2:2013. Part 7 (Special Locations). Zone Information Zone 0: The Interior of the bath or a shower tray NO Fan can be fitted. Zone 1 is limited by: (i) the finished floor level and the horizontal plane corresponding to the highest fixed shower head or water outlet or the horizontal plane lying 2.25m above the finished floor level, whichever is higher. (ii) the vertical surface: a) circumscribing the bath tub or shower basin b) at a distance of 1.20m from the centre point of the fixed water outlet on the wall or ceiling for showers without a basin. The space under the bath tub or shower basin is considered to be zone 1. However, if the space under the bath tub or shower is only accessible with a tool, it is considered to be outside the zones. Zone 2 is limited by: (i) the finished floor level and the horizontal plane corresponding to the highest fixed shower head or water outlet or the horizontal plane lying 2.25m above the finished floor level, whichever is higher. (ii) the vertical surface at the boundary of zone 1 and the parallel vertical surface at a distance of 0.60m from the zone 1 boarder For showers without a basin, there is no zone 2 but an increased zone 1 is provided by the horizontal dimension of 1.2m mentioned in Regulation 701.32.3(ii) b). for ducted installations Where to install

Ventilation – drivers for change ● Government policy – 25% reduction in carbon emissions by 2020 ● Legal commitment to reduce carbon emissions by 80% by 2050 ● Energy Efficiency – Lowering energy usage ● Sustainability – The green agenda ● A Carbon zero commercial new building by 2019 ● A Carbon zero new residential dwelling by 2016 ● Well being, improved indoor air quality – U.K has the highest Increase in asthma in Europe Drivers for change It all started in London when the first “Building Act” came into force forbidding thatched roofs inside the city limits. By the time of the Great Fire of London in 1666, many thatched buildings still remained, spreading the fire. Shortly after the first “inspected” building code was introduced. Fast forward to the “1984 Building Act” and the first appearance of a dedicated ventilation regulation. In 1991 they became the “Building Regulations” with further revisions in 2000, 2006 and 2010, with amendments in 2013. Using the Building Regulations as a tool to meet our commitments to the 2005 Kyoto protocol and more recently the Copenhagen climate agreement, the U.K government has planned a path for the construction industry towards a “new build” Carbon Zero home by 2016. Why? To do this they are using the 2006 regulations as the base line to introduce calculated reduced energy usage and carbon emissions in residential and non-residential dwellings. 2006 Regulations = Starting Point 2010 Regulations = 25% Reduction on 2006 2013 Regulations = 44% Reduction on 2006 2016 Regulations = Carbon Zero New Dwelling

Outside Zones

0.6m

Outside Zones

0.6m

1

2

2.25m

2

0

2

Outside Zones

Outside Zones

Outside Zones

0.6m

0.6m

2

2

1

2.25m

1

2

airflow.com

Customer Services 01494 560800

airflow.com

24

25