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micro-renewable solutions for a sustainable future

Low Energy New Build: Low Energy New Build: Assessing the running costs of a low energy Assessing the running costs of a low energy

new build 3 years onnew build 3 years on

Frank McElroy, Regional Director, Ecoliving


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Project Background

Clients bought a small farm, East Cambusmoon, within the Loch Lomond & Trossachs National Park.

The existing Victorian farmhouse was in a poor state and was demolished.

Thomas Robinson Architects designed a four bedroom family home to replace the existing one and half storey farmhouse. It had to be traditional in external form and contemporary in internal feel and had to sit comfortably in the landscape of the National Park and with the other neighbouring farm buildings.

The Challenge was minimizing energy consumption while maximizing the views north to Ben Lomond.


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Construction Details

Timber-framed one-and-a-half storey4 bedroom contemporary longhouse

Total Floor Area 246m²

Project Value £300,000


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Construction Details

Living area and kitchen located at south end of the house with lots of glazing to benefit from solar gain

Super insulated roof

White render finish with untreated larch cladding

Slate roof with slate recycled from old demolished farmhouse

Timber frame over-clad in wood fibre adding 50% to wall thickness and contributing to airtightness

150mm concrete floor on 200mm insulating polystyrene

High levels of airtightness coupled with heat recovery ventilation


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Construction DetailsU-Values

AECB Silver

East Cambusmoon

Farm Heat losses

Windows 1.50 1.60 35%

Doors 0.80 1.60 4%

Roof 0.15 0.15 25%

Walls 0.25 0.21 26%

Floor 0.20 0.14 10%


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Energy Target

Clients run a wind power company, Lomond Energy, and were keen to build an eco home.

They joined the Association of Environmentally Conscious Builders and decided to adopt the Association’s CarbonLite Silver Standard as the specification for energy efficiency:

80% improvement on current buildings standards.

“Our objective was to achieve this specification without breaking the bank or giving local builders a problem.”


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Energy Target

AECB CarbonLite Standards

Primary Energy kWhp/m2 CO2 ECF Electricity equivalent targets

Space DHW Total kg/m2 Space DHW Electricity Total

Silver 40 18 120 22 3542 1594 5491 10627

Passivhaus 15 120 n/a 1328

Passivhaus UK 15 78 15 1328

Gold 15 8 58 4 1328 708 3100 5136


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Ecoliving Engages with Customer

Their Home Their Needs Their SiteSTARTHERE

Survey

Gather the information

Review the options

Critical Success Factors:• Appropriate Design• Quality Products• Experienced Installer



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Micro-renewable Energy SolutionsBroad range of products to call on in designing solutions appropriate to client, dwelling and site requirements



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Low Energy Specification

Heating and hot water Heating is distributed via underfloor heating with pipe work in the 150mm floor slab on 200mm polystyrene insulation.

No heating upstairs but towel rails in the bathrooms


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Heating and hot water Delivered by 5 kW NIBE ground source heat pump with integral hot water cylinder and 300m ground collector in adjacent field. Collector pipe work 1m below surface and 1m apart.


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Supplementary HeatingSpace heating in living room supplemented with Contura wood-burning stove with dedicated, sealed fresh air inlet into bottom of stove.

No interference with the ventilation flow rates.


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Insulate Right – Ventilate Right

InsulationPavatex 'Pavatherm Plus' woodfibre board and Rockwool flexi 140mm battsWall insulation 200mm Roof Insulation 350mm


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Insulate Right – Ventilate Right

Heat recovery Heat recovery ventilation system with air to air heat exchanger. Damp, stale air extracted from ‘wet rooms’ and used to pre-warm fresh supply air from outside whichis filtered and then ducted to living areas and bedrooms.

Imagine the condensation here without a ventilation system!


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3 years on

Clients moved into new home in May 2008. Energy consumption and costs have been carefully monitored since then.


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http://eastcambusmoon.blogspot.comhttp://eastcambusmoon.blogspot.com/


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View north to Ben Lomond

Close to self sufficiency from the vegetable garden


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Annual Energy Actuals

AECB CarbonLite Standards

Primary Energy kWhp/m2 CO2 ECF Electricity equivalent targets

Space DHW Total kg/m2 Space DHW Electricity Total

Silver 40 18 120 22 3542 1594 5491 10627

Passivhaus 15 120 n/a 1328

Passivhaus UK 15 78 15 1328

Gold 15 8 58 4 1328 708 3100 5136

ECF Actual 31 24 95 19 2732 2105 3599 8435


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Annual Energy Actuals


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Annual Running Costs

Heating £286Hot water £226

Electricity £371

Annual Running Costs £883

Solar PV is currently being installed (10kWp) and is expectedto cover 80% of the home’s energy requirements.

This expected to reduce the annual running cost to £177!


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1 Become more energy self-sufficient and substantially reduce your running costs

2 Improve your indoor climate with the latest renewable heating and heat recovery technology3 Harness nature’s energy and reduce your carbon footprint4 Enhance the value of your property (existing or new build)5 Receive an income for the electricity or heat you generate using

renewable energy

5 Reasons to invest in renewable energy for your property sooner rather than later!


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We welcome your enquiries.STAND TV52

We look forward to helping you reduce heating and energy bills, reduce carbon emissions and create a sustainable, warm and healthy indoor climate!

Thank you for your attention!

Frank [email protected]

www.ecolivinguk.comTel: +44 (0)845 301 3121


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