building regulations update · change of use •calculation required before completion certificate...
TRANSCRIPT
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Building Regulations Update
Joe CampionBSc (Hons) MBEng ACIOB MIFireE
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2010 Changes to The Building Regulations
• Part G – April 2010
• Water efficiency & sanitary • Water efficiency & sanitary provision
• Part L & F – October 2010
• Conservation of Fuel & Power
• Ventilation
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Part G
• G1 – Water Quality
• G2 – Water Efficiency
• G3 - Hot Water Supply• G3 - Hot Water Supply
• G4 – Sanitary Provisions
• G5 – Bathrooms
• G6 – Food Preparation Areas
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Part G1 – Provision of Cold Water Services
• Definition of wholesome and non-wholesome water
• Allows recycled or rainwater to be used for non wholesome useused for non wholesome use
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G2 Water Efficiency
• Maximum water use per person per day
• 125 litres maximum of wholesome waterwholesome water
• Calculated by formula
• Allows additional non wholesome water use
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Regulations 17K & 20E
• Only Applies to dwellings
• New build dwellings
• New Dwellings formed by material change of usechange of use
• Calculation required before Completion Certificate issued
The Water Efficiency Calculator for New Dwellings
Available from Planning Portal
www.wrcplc.co.uk/PartGCalculator/Calculator.aspx
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Water Use
• Low flush WC
• Aerated taps & showers
• Smaller baths• Smaller baths
• Low water use appliances
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G3 – Hot Water Services
• Requires hot water supply to sinks within toilet accommodation
• Specifically includes food prep areas
• Vented Hot Water Storage systems require additional energy cut out to require additional energy cut out to prevent boiling the water
• Pressurised systems require two independent safety devices
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Prevention of Scalding
• In line hot water tempering valves required where DHW store can exceed 80oC
• In line blending valve to baths• In line blending valve to baths
• Thermostatic mixing valves
• Limiting temperature to 48oC
• Only applies to dwellings
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G4 – Sanitary Provision
• Follow Guidance within Workplace Regs 1992
• or BS 6465: Part 1 2006• or BS 6465: Part 1 2006
• ‘Adequate and Suitable’ provision now part of Building Regulations
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Workplace Scale of Provision
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Non Domestic Buildings
• Separate sinks for hand washing required within commercial kitchens
• Single door between WC • Single door between WC and kitchen – but beware Environmental Health Officers Requirements
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General Items
• Hot taps should always be on the left
• All new dwellings to have WC with integrated washing facilityintegrated washing facility
• Must also have a bath or shower
• Single door required between WC and kitchens
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Part L Conservation of Fuel & Power
• Moving towards “Carbon Neutral”
• 2016 Zero Carbon • 2016 Zero Carbon Building Regulations for domestic
• 2019 for Commercial
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‘Timetable for Change’
2010 25% reduction Code level 3
2013 44% reduction Code level 4
2016 100% reduction Code level 5
Taken from 2006 Part L Baseline
Non Domestic Buildings move to 100% by 2019
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Non Domestic
• 25% CO2 improvement required over 2006 Part L
• Submit a design stage SBEM
• Submit list of key design features• Submit list of key design features
• New Regulation to require a commissioning plan at submission stage
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Solar Gain
• Solar gain must be considered on all building types
• Including Air • Including Air conditioned buildings
• More than 40% of external wall glazed could cause potential problems
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25% Improvement
• Improvement is likely to be averaged over different categories of buildings
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Why?
• Aim is to maximise all efficiency savings possible
• Reduce maximum amount of CO2with minimum cost across building with minimum cost across building types
• CO2 savings have different costs in different types of buildings
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Quality of Construction
• Increased sample of air testing for dwelling
• All non domestic buildings require testingtesting
• Improved thermal bridging
• Testing of heating ductwork
• Improved commissioning
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Linier Thermal Bridging
Three Proposed Options
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Ψ-Value Calculation
• Accreditation Scheme Proposed
• CA, Kingspan or Eurobond may produce standard details
• Traditional details should be freely • Traditional details should be freely available (ACD)
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On Site Assessment
• On site inspection of details
• Checking for buildability
• Reporting of defects
• Continuous improvement of details
• Someone must pay for this
• Traditional details bigger problem
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Un Accredited Details
• No added costs
• May not have big effect on SBEM
• Buildings with high heating • Buildings with high heating loads would be more effected
• Care homes, schools, leisure centres, distribution warehouses little effect
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Air Testing of Ductwork• Ductwork leakage testing to low pressure ductwork
• Required when SBEM • Required when SBEM assumes low air leakage to improve calculation
• Not required for ventilation only
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SBEM Example - School
• Currently TER 35.96 BER 34.97
• Standard Spec for new School
• Gas central heating• Gas central heating
• Natural ventilation
• Good natural daylight
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2010 SBEM
• U-values 0.15w/m2k Floor & Roof
• U-values 0.20w/m2k Wall
• U-values 1.50w/m2k Windows
• Air leakage 5m3/(m2.h)@50Pa• Air leakage 5m3/(m2.h)@50Pa
• Boiler 98% Efficient with controls
• Very good lighting
TER 20.68 - BER 22.17 - FAILS
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Suggestions?
• LED Lighting to corridors toilets etc
• Daylight sensing –Schools OfficesSchools Offices
• Go air conditioning
• Renewables
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Energy Use - Office
LightingHeating
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Offices – Natural Ventilation
• Lighting has high carbon load
• Auto Switching and daylight dimming provide a big saving
• LED’s to circulation spaces & toilets• LED’s to circulation spaces & toilets
• Low installed power loads
• Automatic monitoring & targeting to energy meters
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Heating Systems
• Thermal Mass can provide 10% improvement (5% with aircon)
• High efficiency condensing boilers
• 95% efficient or better• 95% efficient or better
• Use underfloor heating with heat pump boilers
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Other Features
• Power Factor Correction
• aM&T to Energy Meters
• Maximise areas of South Glazing
• But beware of Overheating!!• But beware of Overheating!!
• Renewables
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Energy Use – Leisure Centre
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Domestic Hot water
• Any showering facility increases DHW demand significantly
• Super efficient DHW boilers 98%+
• Direct rather than large storage • Direct rather than large storage capacity – Reduces standing losses
• Limit the boilers to showering areas – Reduces distribution losses
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Storage & Industrial
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Storage & Industrial
• LED Floodlights rather than Metal Halide box lighting
• Improve U-values to walls 0.25w/m2k
• Floor & Roof U-values 0.20w/m2k• Floor & Roof U-values 0.20w/m k
• Air leakage 5m3/(m2/h)@50Pa
• Good thermal bridging details
• Efficient Warm Air Heaters 95%+
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Retail - Supermarket
• Build to current standards they should PASS
• Why?
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Low & Zero Carbon Systems
• Solar Thermal
• Combined Heat & Power
• Wind Turbines• Wind Turbines
• Photovoltaic
• Heat Pumps
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Feed in Tariffs (FiT)
• Payment received for renewable energy generation
• Regardless of end use
• MCS Accreditation • MCS Accreditation required for Installers
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Renewable Heat Incentives (RHI)
• Similar to FiT
• Heat Pumps
• Solar thermal
• CHP• CHP
• Aerobic Digestion
• Biomass/Bio fuel
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Part F - Ventilation
• Only real changes to dwellings
• Commissioning of ventilation systems
• Visual inspection for natural • Visual inspection for natural ventilation
• Testing of extract and whole house ventilation systems
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Part L Summary• Heat pump boilers replacing gas boilers
• LED lighting for non-domestic may provide benefits to get a pass
• Solar shading and thermal mass important, not enough alone
• Solar shading and thermal mass important, not enough alone
• Low and Zero Carbon Systems can help
• U values and air permeability will require improvements
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Questions
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Thank You
Joe CampionBSc (Hons) MBEng ACIOB MIFireE