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