Update On Part F and L And What It Means For Ventilation

Pete Smith

Specialist Sales and Training Manager

Parts F and L 2010

Agenda• Part F History• The New Structure• Design Performance• Part F Ventilation Systems• Air Permeability and Performance• Part L Main Changes and Overview• Summary and Questions

Vent-Axia Since 1936

Company Locations

Dudley -

Metals and Systems

Crawley -

Plastic Assembly

Swindon - Motors

The largest UK ventilation employer

Over 800 employees 4 locations

Reading – Plastic Extrusions

History

• 1992 – Part F – Bathroom and Kitchens needed extract rates for the first time

• 1995 – Utility rooms were added

• All rates were intermittent

• Refurbishment followed good practice and used the same solutions

1992 -1995

Intermittent Fans

Bathroom 15l/s

(100mm)

Utility Room30l/s

(150mm)Added 1995

Kitchen60l/s

(150mm)

2006

• New Part F Regulations expanded to include intermittent and continuous systems

• New Part L Regulations developed because of the Energy Performance of Buildings Directive (EPBD) in Europe

• Direct influence on product design• SAP became the standard tool for calculating

the energy use of domestic buildings

2006

Intermittent and Continuous

Intermittent FansPassive stack

ventilationMEV MVHR

Developing Market

Refurb

IntermittentContinuous

unitary extract

Single Room MVHR

New Build

Intermittent PSV MEVCentralised

MVHR

New Structure 2010

Legal requirements in the Building

Regulations and Part F of Schedule

1

1st Tier

ApprovedDocument

F

2nd Tier

Domestic Ventilation

Installation and Commissioning

Guide

3nd Tier

Industry, Guides, Good practice

Guides, Codes of practices and

standards

Both ADF and ADL refer to additional guides in the form of 2nd and 3rd tier documents

Building Regulations

• Part F – Air-tightness – – Tighter building mean more controlled

ventilation

– Installation – – Tighter policing on installation as

performance becomes more critical

• Part L– SAP – SBEM

Tools that measure energy efficiency with targets to improve it

Approved Document F

Compliance

Design Performance CriteriaMeans of ventilation and airflow rate based on dwelling permeability

Installation and CommissioningInstalled performance to be achieved through Competent Persons scheme

Operation and MaintenanceEnd user information to ensure effective use and maintenance

Design Performance

• Dwelling Air Permeability <5m3/(h.m2)@50Pa

• Dwelling Air Permeability >5m3/(h.m2)@50Pa

Part F Ventilation Systems

Part F Ventilation SystemsSystem 1 Intermittent Extract Fans

Intermittent Extract Fans

System 1 (Intermittent Fan Range)

All Intermittent fans are tested as installed performance

Suitable for Wall, Window, ceiling or ducted applications

System 1 Background Ventilators

System 1 Background Ventilators

Low Carbon VentilationDC Motor Technology

• Low Carbon DC motor technology can now used for ventilation systems that meet Part F of the building regulations

• Part L states that the Specific Fan Power must not exceed 0.5 watts per litre per second

Energy Saving DC Motor

The DC motor is 80% efficient, so for every 100 watts of power only 20% is wasted in heat, compared with conventional motors that are only 20% efficient.

The motors are brushless so generate less friction, and run cooler therefore most of the heat can be transferred into energy.

Brushless DC motors are electronically commutated, hence the phase EC/DC

What is it?

7,000 hrs

20Watts

Energy Saving DC Motor

What benefit does this give?

2.5 Watts

50,000 hrs

Energy Saving DC Motor

What benefit does this give?

System 2Passive Stack Ventilation

One 125mm duct per wet area Maximum two swept 45o bends per stackInternal rooms require mechanical ventilation

Part F Ventilation SystemsSystem 3

Decentralised MEV

Centralised MEV

Part F Ventilation SystemsSystem 3

Decentralised MEV

Part F Ventilation SystemsSystem 3

Centralised MEV

Part F Ventilation SystemsSystem 4

Mechanical Ventilation with Heat Recovery (MVHR)

Counter Flow Heat Exchanger

Internal temp’ 20 degrees

Exhaust temp’ is 2 degrees

OUTSIDE

INSIDE

Counter Flow Heat Exchanger

External ambient 0 degrees

Internal temp’ 20 degrees

Exhaust temp’ is 2 degrees

Supply temp’ is 18 degrees

OUTSIDE

INSIDE

Design Performance

• Dwelling Air Permeability <5m3/(h.m2)@50Pa

Design Performance

• Dwelling Air Permeability <5m3/(h.m2)@50Pa

System 4 (MVHR Range)

MVHR units are SAP Appendix Q Listed

Various models to meet project requirements

Compact and light weight

Easy access filters for annual maintenance.

100% Speed Control for accurate site commissioning

User and Contractor friendly controls

Automatic Integral control options

Appendix Q Ventilation Scheme

The Products;

The SAP Default Vs Practical Actual's

Appendix Q

MEV

MVHR

Default SFP

W/L/S

Actual SFP

W/L/S

Default Thermal

Efficiency

Actual Thermal

EfficiencyMEV 0.8 0.2 N/A N/AMVHR 2.0 1.0 66% 85%

Main Changes - 2010 Edition

• Ventilation will become a controlled service needing sign off by a “competent person”

• 2nd tier “Domestic Ventilation Installation and Commissioning Guide” with a sign off sheet

• All ventilation systems shall be commissioned (including Intermittent Fans and Cooker Hoods)

• Commissioning checklist to be passed to Building Control

Noise

• Continuous Mechanical ventilation systems should be below 35dBA on trickle speed

Domestic Ventilation Compliance Guide

Domestic Ventilation Compliance Guide

Domestic Ventilation Compliance Guide

Domestic Ventilation Compliance Guide

Domestic Ventilation Compliance Guide

Domestic Ventilation Compliance Guide

Domestic Ventilation Compliance Guide

Domestic Ventilation Compliance Guide

Domestic Ventilation Compliance Guide

Competent Person Certification Schemes

• Training for potential installers delivered by manufacturers, colleges and independent trainers:

• Design• Installation• Commissioning• Handover

Main Changes in the 2010 edition

• The owner/occupier shall be given sufficient information about the ventilation system and its maintenance requirements so that the ventilation system can be operated to provide adequate air flow. This should apply to natural and mechanical systems in new dwellings

Approved Document L

Part L – Energy Efficiency

• The Target Emission Rate (TER) for 2010 is 25% improvement over 2006

• SAP Q process is retained

• New second tier documents in the form of Building Services Compliance Guides for domestic and non-domestic

• These highlight specific performance levels in regard of ventilation

Part L1 - Domestic

Part L1 SummaryImportant Features of Part L

• TER 25% improvement over 2006

• Performance criteria

• Overheating

• Competent Persons Scheme

Houses of the Future

What it means for You

• Your customers will have to become ‘Competent Person’ installers

• They will have to understand the design installation and commissioning process

• System ventilation sales will increase

• Extra revenue on sales

Part F Systems Cost Comparisons4 Bed Kitchen + 4 Wet Rooms

• Intermittent Fans:• £150 + install (1 day)

• MEV:• 1500 + install (3 days)

• MVHR:• £3000 plus install (4 days)

Update On Part F and L And What It Means For Ventilation

Thank you for your attention