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Vent-Axia Seminar: Parts F and L For Ventilation 2010.

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Presentation on theme: "Vent-Axia Seminar: Parts F and L For Ventilation 2010."— Presentation transcript:

1 Vent-Axia Seminar: Parts F and L For Ventilation 2010

2 Agenda Part F History The New Structure Design Performance Part F Ventilation Systems Air Permeability and Performance Part L Main Changes and Overview Competent Person’s Scheme Summary and Questions Parts F and L 2010

3 Vent-Axia Since 1936

4 Company Locations Dudley - Metals and Systems Crawley - Plastic Assembly Swindon - Motors The largest UK ventilation employer Over 800 employees 4 locations Reading – Plastic Extrusions

5 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

6 Intermittent Fans Bathroom 15l/s (100mm) Utility Room 30l/s (150mm) Added 1995 Kitchen 60l/s (150mm)

7 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

8 2006 Intermittent and Continuous Intermittent Fans Passive stack ventilation MEVMVHR

9 New Structure 2010 Legal requirements in the Building Regulations and Part F of Schedule 1 1st Tier Approved Document 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 2 nd and 3 rd tier documents

10 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

11 Approved Document F

12 Compliance Design Performance Criteria Means of ventilation and airflow rate based on dwelling permeability Installation and Commissioning Installed performance to be achieved through Competent Persons scheme Operation and Maintenance End user information to ensure effective use and maintenance

13 Design Performance Dwelling Air Permeability Dwelling Air Permeability

14 Design Performance Dwelling Air Permeability

15 Design Performance Dwelling Air Permeability

16 Part F Ventilation Systems

17 Part F Ventilation Systems System 1 Intermittent Extract Fans Intermittent Extract Fans

18 All Intermittent fans are tested as installed performance Low Carbon motors give 80% reduction in power consumption, 5 Year Motor Guarantee Suitable for Wall, Window, ceiling or ducted applications Part F Ventilation Systems System 1 Intermittent Extract Fans


20 System 1 Background Ventilators


22 Window Vents in Flats With no cross flow in single sided apartments high and low level ventilation is needed This doubles what is already an increased number of vents High Level Low Level

23 Part F Ventilation Systems System 3 MEV Decentralised MEV Centralised MEV



26 Part F Ventilation Systems System 4 MVHR Mechanical Ventilation with Heat Recovery (MVHR)


28 Counter Flow Heat Exchanger Internal temp’ 20 degrees Exhaust temp’ is 2 degrees OUTSIDE INSIDE 90%+ Efficiency

29 External ambient 0 degrees Internal temp’ 20 degrees Exhaust temp’ is 2 degrees Supply temp’ is 18 degrees OUTSIDE INSIDE 90%+ Efficiency Counter Flow Heat Exchanger

30 System 4 (MVHR Range) MVHR units should be SAP Appendix Q Listed Top performing MVHR SAP Q product will help with compliance 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

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

32 Main Changes Edition Ventilation will become a controlled service needing sign off by a “competent person” 2 nd 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

33 Competent Persons Scheme BPEC’s Domestic Ventilation Systems 2010 has been running since May 2011 Recognised by all competent person schemes Delivered by manufacturers, colleges and independent trainers

34 BPEC Training SAP software now includes drop-down box asking whether the system has been installed by an approved installer

35 Domestic Ventilation Compliance Guide 3 Part Sign-Off

36 Information for the Occupier 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

37 Approved Document L

38 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

39 SAP 2009 CO2 factor changed –0.42 to 0.51 Reduced specific fan power the important factor Potential to reduce conservative ratings if installed by a competent person

40 Effect of System Selection in SAP * Used best SFP of 0.18w/l/s for Kitchen + 1 wet room ** Used best SFP/HX eff combination of 0.46w/l/s & 91% for Kitchen + 1 wet room Based on 89m2 Gas Heated Semi Detached dwelling with a TER of 23.00kg.Co2/m2.Yr Treatment of Ventilation Systems in SAP DER (Dwelling C02 Emission Rate) Nat Vent MEV* MVHR** Default MEV Default MVHR Air Permeability Rate (m³h/m2 at 50 Pa)

41 Part L1 - Domestic

42 Part L and Solar Gain Criterion 3 – Limiting the Effects of Solar Gain 4.25 – If ventilation is provided using a balanced system, consideration should be given to providing a summer bypass function during warm weather so that the ventilation is more effective in reducing overheating.

43 Part L1 Summary Important Features of Part L TER 25% improvement over 2006 SAP Q is retained Minimum Specific Fan Power across ventilation systems MVHR efficiency no less that 70%

44 Vent-Axia Seminar: Parts F and L for Ventilation 2010 Thank you for your attention Questions?

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