Document F - Ventilation 2006DocFFinalNC.pdf - UK & WALES BUILDING REGULATIONS - Kielons

MAIN CHANGES IN THE

2006 EDITION

This edition of Approved Document F, Ventilation,

replaces the 1995 edition. The main changes are:

Requirement F2 has been moved to Part C

(Requirement C2(c)).

A mainly performance based approach has

been adopted.

The provisions have been designed to ventilate

buildings having air permeability down to 3m 3 /h/m 2

at 50 Pa.

Ventilator areas are now described in terms of

equivalent area, instead of free area.

More guidance has been given for domestic

mechanical and natural ventilation systems.

Guidance has been given for ventilation of

basements in dwellings.

The recommended air supply rate for offices has

been increased from 8 l/s per person to 10 l/s

per person.

Replacement windows should be fitted with

trickle ventilators, or an equivalent background

ventilation opening should be provided in the

same room.

Appendices give guidance on: Passive stack

ventilation system design and installation; Good

practice on the installation of fans in dwellings;

Minimising ingress of external pollutants into

buildings in urban areas.

Contents

PAGE

Use of guidance

Addition of a conservatory to

an existing building

The Approved Documents

Historic buildings

Limitation on requirements

Materials and workmanship

Section 4: Standards and publications

The workplace (heath, safety and welfare)

Regulations 1992

Standards referred to

Other publications referred to

Mixed use development

Glossary

Means of ventilation

– The Requirement F1

Appendix A: Performance-based ventilation 34

Section 0: General guidance

Appendix B: Purge ventilation

Performance

Appendix C: Example calculations for

ventilation sizing for dwellings

Introduction to the provisions

Section 1: Dwellings

Appendix D: Passive stack ventilation

system design and installation guidance 45

Introduction to provisions

Ventilation rates

Appendix E: Good practice guide to the

installation of fans for dwellings

Ventilation systems for dwellings

without basements

Appendix F: Minimising ingress of external

pollution into buildings in urban areas

Ventilation systems for basements

Ventilation of habitable rooms through

another room or a conservatory

Section 2: Buildings other than dwellings 22

General

Access for maintenance

Commissioning

Offices

Introduction to provisions

Ventilation rates

Natural ventilation of rooms

Mechanical ventilation of rooms

Alternative approaches

Ventilation of other types of buildings

Ventilation of car parks

Alternative approaches for ventilation of

car parks

Section 3: Work on existing buildings

General

Addition of a habitable room

(not including a conservatory) to

an existing building

Addition of a wet room to an

existing building

Ventilation

Approved Document F

Use of guidance

THE APPROVED DOCUMENTS

This document is one of a series that has been

approved and issued by the Secretary of State

for the purpose of providing practical guidance

with respect to the requirements of Schedule 1

to and Regulation 7 of the Building Regulations

2000 for England and Wales.

At the back of this document is a list of all the

documents that have been approved and issued

by the Secretary of State for this purpose.

Approved Documents are intended to provide

guidance for some of the more common building

situations. However, there may well be alternative

ways of achieving compliance with the requirements.

Thus there is no obligation to adopt any particular

solution contained in an Approved Document if

you prefer to meet the relevant requirement in

some other way.

MATERIALS AND WORKMANSHIP

Any building work which is subject to the

requirements imposed by Schedule 1 to the

Building Regulations should, in accordance with

Regulation 7, be carried out with proper materials

and in a workmanlike manner.

You may show that you have complied with

Regulation 7 in a number of ways. These include

the appropriate use of a product bearing CE

marking in accordance with the Construction

Products Directive (89/106/EEC) 1 , the Low

Voltage Directive (73/23/EEC and amendment

93/68 EEC) 2 and the EMC Directive (89/336/

EEC) 3 as amended by the CE Marking Directive

(93/68/EEC) 4 or a product complying with an

appropriate technical specification (as defined

in those Directives), a British Standard, or an

alternative national technical specification of

any state which is a contracting party to the

European Economic Area which, in use, is

equivalent, or a product covered by a national

or European certificate issued by a European

Technical Approval issuing body, and the

conditions of use are in accordance with the

terms of the certificate. You will find further

guidance in the Approved Document supporting

Regulation 7 on materials and workmanship.

Other requirements

The guidance contained in an Approved Document

relates only to the particular requirements of the

Regulations which the document addresses. The

building work will also have to comply with the

requirements of any other relevant paragraphs in

Schedule 1 to the Regulations.

There are Approved Documents which give

guidance on each of the parts of Schedule 1

and on Regulation 7.

Independent certification schemes

There are many UK product certification schemes.

Such schemes certify compliance with the

requirements of a recognised document which is

appropriate to the purpose for which the material

is to be used. Materials which are not so certified

may still conform to a relevant standard.

Many certification bodies which approve such

schemes are accredited by UKAS.

LIMITATION ON REQUIREMENTS

In accordance with Regulation 8, the requirements

in Parts A to D, F to K and N (except for

paragraphs H2 and J6) of Schedule 1 to the

Building Regulations do not require anything

to be done except for the purpose of securing

reasonable standards of health and safety for

persons in or about buildings (and any others

who may be affected by buildings or matters

connected with buildings). This is one of the

categories of purpose for which Building

Regulations may be made.

Paragraphs H2 and J6 are excluded from

Regulation 8 because they deal directly with

prevention of the contamination of water.

Parts E and M (which deal, respectively, with

resistance to the passage of sound, and access

to and use of buildings) are excluded from

Regulation 8 because they address the welfare

and convenience of building users. Part L is

excluded from Regulation 8 because it addresses

the conservation of fuel and power. All these

matters are amongst the purposes, other than

health and safety that may be addressed by

Building Regulations.

Technical specifications

Building Regulations are made for specific

purposes: health and safety, energy conservation

and the welfare and convenience of disabled

people. Standards and technical approvals are

relevant guidance to the extent that they relate

to these considerations. However, they may also

address other aspects of performance such as

serviceability, or aspects which although they

relate to health and safety are not covered by

the Regulations.

As implemented by the Construction Products Regulations 1991

(SI 1991/1620).

As implemented by the Electrical Equipment (Safety Regulations 1994

(SI 1992 No. 2372)).

As implemented by the Electromagnetic Compatibility Regulations 1992

(SI 1992 No. 2372).

As implemented by the Construction Products (Amendment) Regulations

1994 (SI 1994 No. 3051) and the Electromagnetic Compatibility

(Amendment) Regulations 1994 (SI 1994 No. 3080).

Ventilation

Approved Document F

USE OF GUIDANCE

When an Approved Document makes reference

to a named standard, the relevant version of the

standard is the one listed at the end of the

publication. However, if this version has been

revised or updated by the issuing standards

body, the new version may be used as a source

of guidance provided it continues to address the

relevant requirements of the Regulations.

The appropriate use of a product which complies

with a European Technical Approval as defined in

the Construction Products Directive will meet the

relevant requirements.

The Office intends to issue periodic amendments

to its Approved Documents to reflect emerging

harmonised European Standards. Where a national

standard is to be replaced by a harmonised

European Standard, there will be a co-existence

period during which either standard may be

referred to. At the end of the co-existence period

the national standard will be withdrawn.

MIXED USE DEVELOPMENT

In mixed use developments part of a building

may be used as a dwelling while another part

has a non-domestic use. In such cases, if the

requirements of this part of the Regulations for

dwellings and non-domestic use differ, the

requirements for non-domestic use should

apply in any shared parts of the building.

THE WORKPLACE (HEALTH,

SAFETY AND WELFARE)

REGULATIONS 1992

The Workplace (Health, Safety and Welfare)

Regulations 1992 as amended by The Health and

Safety (Miscellaneous Amendments) Regulations

2002 (SI 2002/2174) contain some requirements

which affect building design. The main requirements

are now covered by the Building Regulations,

but for further information see: Workplace health,

safety and welfare: Workplace (Health, Safety and

Welfare) Regulations 1992, Approved Code of

Practice , L24, HMSO, 1992 (ISBN 0 71760 413 6).

The Workplace (Health, Safety and Welfare)

Regulations 1992 apply to the common parts

of flats and similar buildings if people such as

cleaners and caretakers are employed to work in

these common parts. Where the requirements of

the Building Regulations that are covered by this

Part do not apply to dwellings, the provisions

may still be required in the situations described

above in order to satisfy the Workplace Regulations.

Ventilation

Approved Document F

Document F - Ventilation 2006DocFFinalNC.pdf

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