52 HEATING & RENEWABLE ENERGY; INSULATION
heat loss (the Building Emissions/Energy Rate) compared with the previous standard.
Y-values (heat loss across the length of
the cold bridge) are calculated from the ψ values, and are used by the designers in the SAP/SBEM calculation of the build- ing. In the absence of knowing the true Y-values, Building Regulations require a ‘default Y-value’ to be used which makes it harder to achieve a good energy rating, and in turn could result in non-compliance with Part L/Section 6. These default Y- values add an approxi- mated additional heat loss to the whole property, which is less accurate than calcu- lating it using the approved data provided by a product manufacturer.
MOVING TOWARDS THE 2019 ZERO CARBON STANDARD
English Building Regulations for dwellings (Part L1A: 2013) now include another measurement of heat loss: Fabric Energy Efficiency. This standard is based on the Ene2 points calculation used in the Code for Sustainable Homes. This requirement is met by ensuring continuity of the insula- tion on the fabric of the building. It is measured in terms of kilowatt-hours of energy lost for every square metre. The 2019 regulations for zero carbon buildings (non-domestic) will demand a 100 per cent improvement in the overall
Island Living in the Heart of the City
Body text Company name Tel www.
development, which was recently awarded Best New Place to Live at the London Planning Awards 2017. This new neighbourhood on the Leamouth Peninsula by Canary Wharf is designed to be a ‘mini Manhattan’ and is home to 1,700 new apartments, stunning al fresco spaces, vibrant new bars and restaurants, boutique shops and waterside parks. Phase one has been completed by Ballymore and phase two will be delivered by EcoWorld Ballymore. With a focus on energy efficiency and aiming
E
to reduce the environmental impact of the development, City Island features a district heating system, which supplies residents with thermal energy for heating and production of domestic hot water. Evinox Energy are supplying heat interface
units, and ENE3 room controllers for the apartments connected to the district heating network, and also metering & billing services for the social housing apartments.
Pre-Payment for Heating & Hot Water The 104 social housing apartments at London City Island are managed by Clarion Housing
vinox Energy are delighted to be working with EcoWorld Ballymore and Clarion Housing Group on the London City Island
of the Heat Network (Metering & Billing) Regulations at London City Island. The metering and billing technology is inbuilt in each ModuSat® Heat interface unit. Not only is the technology integrated, it can also be activated remotely at any time, providing a flexible billing approach for the social housing apartments.
Credit towards Code for Sustainable Homes
Group, and all are taking advantage of the Evinox PaySmart® Pre- payment system. Residents can purchase their energy online using our Residents Website 24hrs a day, at a local Payzone outlet, by monthly Direct Debit or Standing Order, using our Web App on a smart phone or tablet any time or over the telephone.
Metering and Billing Regulations Our PaySmart® pre-payment system provides a simple solution to meet with the requirements
Each home at City Island also features an Evinox ViewSmart ENE3 controller, which can display all the information required to gain credits for the Code for Sustainable Homes. This includes historical consumption data in a graphical format to enable residents to view information about their usage and compare different periods. This provides several benefits to social housing providers and developers, primarily it removes the requirement to install a separate energy display device to gain credits towards the Code for Sustainable Homes. For further information about our integrated
communal & district heating solutions, please contact us by email or visit the website.
01372 722277
www.evinoxenergy.co.uk
WWW.HBDONLINE.CO.UK Enq. 175
OFFSETTING THE COST Using high insulating, load-bearing building blocks can even allow the level of insulation required elsewhere to be reduced. Incorporating such products into a design will reduce the Y-value used in SAP or SBEM. Because SAP/ SBEM are concerned with the overall heat loss, if the Y-value is reduced (meaning the heat loss at the thermal bridge is reduced), the U-value of the wall or floor insulation could possibly be slightly compromised, yet still the overall heat loss or DER (Dwelling Efficiency Rate) would be the same. With the need to improve energy efficiency and move closer towards the target of zero carbon homes, housebuilders and developers will continue to face the challenge of controlling heat losses due to thermal bridging. Using high insulating building blocks to reduce heat loss at the wall-floor junction is estimated be able to reduce the stated research levels of 30 per cent to approximately two per cent,
and reduce the daily CO2 emissions associ- ated with this wasted heat from 1.5 kg to 0.1 kg.
Article from Marmox Specialist Building Products Enq. 174
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