Kings School Meadows - House type S2A

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Plot 20 is 49 Green Street is house type S2A of a new build housing estate of 21 houses.
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Kings School Meadows - House type S2A : Project images

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CO2 emissionsPrimary energy requirement
Energy target
AECB Silver

Energy and fuel use

Fuel use by type
Primary energy requirement
CO2 emissions

Measured data from renewable generation is not yet available.

Fuel use

Electricity use - 910.6 kWh/yr -
Natural gas use- 4383.44 kWh/yr -
Oil use- - -
LPG use- - -
Wood use- - -
Other Fuel - - -
Primary energy requirement - 117 kWh/m².yr -
Annual CO₂ emissions - 23 kg CO₂/m².yr -
Annual space heat demand - 39 kWh/m².yr -

Renewable energy

Electricity generationForecastMeasured
Renewables Technology--
Other Renewables Tech--
Electricity consumed by generation --
Primary energy requirement
offset by renewable generation
117 kWh/m².yr -
Annual CO₂ emissions
offset by renewable generation
23 kg CO₂/m².yr -

Calculation and targets

Whole house energy calculation method PHPP
Other whole house calculation method-
Energy target AECB Silver
Other energy targets-
Forecast heating load 20 W/m² demand


Pre-development air permeability test--
Final air permeability test16 January 20152.48m³/m².hr @ 50 Pascals

Project description

Start date05 May 2014
Occupation date07 April 2015
Location Nottingham Nottinghamshire  England
Build typeNew build
Building sectorPublic Residential
Property typeMid Terrace
Construction typeMasonry Cavity
Other construction type100 Facing brick 200 ecobead insulated cavity 100 internal block
Party wall constructionCavity party wall 2 skins 100 dense block with insulated cavity
Floor area 62.8
Floor area calculation method Treated Floor Area (PHPP)
Building certification  AECB silver standard certified building AECB silver standard certified building

Project Team

OrganisationWilliam Davis Limited
Project lead personWilliam Davis Limited
Landlord or ClientBlue Print Limited Partnership
ArchitectMarsh Grochowski Architects
Mechanical & electrical consultant William Davis Limited
Energy consultantEco Design Consultants Limited
Structural engineer
Quantity surveyorPulse Associates Ltd
ContractorWilliam Davis Limited

Design strategies

Planned occupancyThese are private sale and the occupancy is unknown.
Space heating strategyEach unit has an individual condensing mains gas boiler to water filled radiators
Water heating strategyEach unit has a combined condensing gas boiler, providing instant hot water.
Fuel strategyMains Gas as primary heating source, and mains electricity.
Renewable energy strategyNo renewable electricity generation.
Passive Solar strategyAll units modelled in PHPP for orientation, generally windows sized sensibly.
Space cooling strategyOpening windows, plus some cooling via MVHR in summer bypass mode.
Daylighting strategyNo particular strategy given.
Ventilation strategyMechanical ventilation with heat recovery for background ventilation, opening windows for purge ventilation, and summer cooling.
Airtightness strategy Ensuring properly detailed junctions and site supervision and on site inspection with signed check list sheet. Airtightness membrane to roof, with airtightness tapes to joints.
Strategy for minimising thermal bridges Some thermal bridge analysis undertaken, Continuous insulation maintained whenever possible, with an on site inspection and check list sheet to ensure compliance. Junctions assessed include: foundations and internal load bearing walls at ground.
Modelling strategyPassive House Planning Package used to model energy strategy.
Insulation strategyWall U value = 0.15 W/mK. Roof U value =0.09w/mK. Floor U value = 0.13W/mK
Other relevant retrofit strategies
Contextual information

Building services

OccupancyDesigned maximum occupancy of 8 persons.
Space heatingMains gas condensing Combi Boiler
Hot waterDomestic hot water by Combi boiler
VentilationMVhr system 4 ventilation system Itho Advance SAP 87% efficiency
ControlsRoom thermostats
LightingCompact Fluorescent lighting through out
Renewable energy generation systemNo installation
Strategy for minimising thermal bridgesDetails designed and check on site with in progress site photos and site sign off check list to confirm the work is carried out as designed.

Building construction

Storeys 2
Volume 157
Thermal fabric area 14064
Roof description 10 Degree Mono pitch cold roof construction - insulated at ceiling joist level with 450mm mineral wool
Roof U-value 0.89 W/m² K
Walls description Masonry cavity wall brick facing to outer leaf 200mm Eco Bead cavity insulation 100mm Block inner wall - 13mm wet plaster internal finish
Walls U-value 0.15 W/m² K
Party walls description Masonry cavity party wall with thermal closer pieces each end of wall to avoid thermal chimneys to Building Regulation
Party walls U-value -
Floor description Ventilated block and beam floor with 150mm insulation and 45mm screed topping
Floor U-value 0.14 W/m² K
Glazed doors description High Performance timber Door
Glazed doors U-value 1.20 W/m² K installed
Opaque doors description High performance timber door
Opaque doors U-value 1.90 W/m² K installed
Windows description High performance timber windows
Windows U-value 1.20 W/m² K -
Windows energy transmittance (G-value) 50 %
Windows light transmittance -
Rooflights description
Rooflights light transmittance -
Rooflights U-value -