2016 SHAP CONFERENCE 2016 New build standards – setting targets and measuring success JOHN BEDFORD
2016 The Business Case for Low/Zero carbon new build. What do we keep from the pre housing review standards? John Bedford, Director of Project Development. 05 th May 2016
Our organisation’s social responsibility? If standards are an accepted minimum, why bother to do better? “ The test of our progress is not whether we add more to the abundance of those who have much, it is whether we provide enough for those who have little ” Franklin D. Roosevelt.
We are where we are….. The Current Standards, what are they? do they help? To review Government thinking. Low/Zero Carbon is not just about lifestyle. Holistic low/zero carbon approach.
The case for low/zero carbon new build Is it not our corporate and social responsibility to:- Reduce heating demand. Reduce running costs. Fabric First/Sustainability first. Performance leads innovation More for less. Do the best we can for what we have. Do not accept resting on one’s laurels! A desire to lead the sector.
Is better design a low carbon solution anyway?……….. Reduce energy use – Reduce our carbon footprint. Energy Generation – Cost offset. Building Preference – Fabric type/construction process. Maintenance – Reduced whole life costings. Customer Satisfaction – Ease of use and cost savings.
The Kyoto Pyramid of design hierarchy
Current standards, what do we have? PassivHaus. The previous CfSH. Lifetime Homes. Secured by design. Current Building Regulations. NHF Housing Standards Handbook. The now obsolete Housing Quality Indicators and Design Quality Standards.
PassivHaus Fabric First. Insulation levels and thermal bridging. Solar Gain and thermal mass consideration. Total energy load no more than 120 kWh/m2 PA. U-Value 0.15W/(m2)-k . Heating load no more than 15 kWh/m2 PA. Air tightness and Ventilation Strategy. 0.6m3/(hr-m2)@50pa. Triple Glazing.
The Code for Sustainable Homes. SAP rating based assessment. Offset tool around site wide issues and ecology and environmental impact. Considered a limit on water consumption @ 105 litres per person per day. Not a complex assessment, was designed to be a consumer awareness campaign.
Building Regulations Methodology of calculating energy performance of buildings:- Carbon Emission based assessment around SAP ratings with an appropriate renewables solution assessment. Elemental envelope performance in U-Value 0.30 W/(m2)-k and air tightness at 10m3/(hr-m2)@50pa Considers water consumption in part G @ 125 litres per person per day. No ecological performance requirement.
NHF Housing Standards Handbook An updated approach. Best practice based. Promoting good design. Minimal technical standards. Quality focussed agenda. Space standards and place making. More of a briefing tool than a guide to low carbon design.
What does all this this mean? The average UK home uses around 16000 kW of energy per annum. 4000 kW on electricity, and 12000 kW on gas. Only 68% of heating systems use gas in the UK. (Source:- DECC Energy Consumption in the UK 2014). The average 3 bedroom, 5 person home is designed to be around 83 m2. The average total energy consumption therefore is 187 kW/m2 PA. The average cost of a kWh is 12 pence for Electricity and 4 pence for Gas. Plus standing charges. (Source:- UKPower.co.uk). The average UK home’s running cost for energy is therefore approx £1100. With standing charges. 67% is for space heating , or approx £700.
Where should we be?......... PassivHaus. The S.H.A.P. Standard? The CfSH. NHF Housing Standards Handbook. Building Regulations.
Key Principles Energy reduction/generation/storage. Space standards. Water reduction. Lifestyle and Well-being. Air Quality. Sound Transmission. Waste Recycling. Day Lighting. Amenity and Recreation/Allotments and edible native vegetation. Minimise service charges. Transport and accessibility.
Proposal. Energy reduction for space heating – adopt a kWh level for energy consumption, say 35 kW/m2 PA ? Approx £180 for Gas/ £400 for Electricity Total energy consumption reduction/generation/storage – adopt a kW level for total energy consumption of say 100 kW/m2 PA Approx £700 Water reduction - set an achievable standard say 120 litres per person per day Space standards – adopt the national draft? Design to the principles of CfSH level four for waste recycling? Include a strategy for allotments and edible walls/native vegetation? Design to the principles of CfSH level four for Health and Well-being for:- Sound Transmission Day Lighting Amenity and Recreation
Quick comparison. Energy Per sqm Total based on Hot Heating. pumps. lighting. appliances cooking Total. Primary a typical 3 STANDARD Water. Kw/pa Kw/pa Kw/pa . Kw/pa Kw/pa Kw/pa Energy. bedroom, Kw/pa Kw pa 5 person home @ 83 sqm. Accord. (New Build) No gas/ 2553.59 1788.32 0.00 369.64 2570.73 830.21 8112.49 11868.92 97.74 5kw PV EnergieSprong. 2490.00 800.00 0.00 369.64 2201.09 830.21 6690.94 20541.19 80.61 (Existing) Building Regulations. 3086.87 1981.31 308.59 369.64 2570.73 830.21 9147.35 18706.23 110.21 (New build) UK Average. 9625.98 2061.40 75.00 369.64 2570.73 830.21 15532.96 25246.42 187.14 (Existing)
The contribution of the Construction process. • If performance dictates low energy demand. • Low energy demand results in low carbon. • The construction process can also support zero carbon. How?
Dry construction, less water. Less site waste. Quicker build time.
Better by design……. OSM offers better performance to support lower running costs, fabric first and better quality. Carbon neutral materials. Enhanced air tightness. Flexible just in time approach. Reduced carbon footprint throughout the process.
Build off site.
How is success measured? Key performance indicators to cover:- Water use. Energy use. Occupant’s satisfaction. Whole lifecycle costing analysis. Sound tests. Air tightness.
What does success look like? Inherently low carbon processes. Reduced running costs. Occupants health and wellbeing. Better quality lower maintenance buildings. Enhanced kerb appeal.
Next steps. The Government was defeated in a House of Lords vote on the zero-carbon homes amendment on the 26 April as peers urged policy makers to back up the commitment made by the UK at COP21 in Paris and make higher carbon standards mandatory as soon as possible. The new amendment of the Housing and Planning Bill - approved by 48 votes - called upon the Secretary of State to ensure “that all new homes in England built from 1 April 2018 achieve the carbon compliance standard ”. The reinstatement of the zero-carbon homes policy received cross-party support as peers commented on the potential of the amendment to contribute to meeting greenhouse gas (GHG) emissions targets and help lower fuel bills.
And finally…… “ Low/zero carbon new build is an inherent result of good design based around our sectors corporate and social responsibility to deliver better quality, more affordable and cheaper to run homes for our customers ”. John P. Bedford.
Thank You.
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