1. D T 7 7 4 a - E N E R P H I T S C H O O L P R O J E C T Colette Harold D12124981

2. P L A N & E L E V A T I O N S NORTH-EAST ELEVATIONNORTH-WEST ELEVATION LAYOUT PLAN ENTRANCE SOUTH-EAST ELEVATIONSOUTH-WEST ELEVATION CLASSROOM 1CLASSROOM 2 CLASSROOM 3 CLASSROOM 4 ENTRANCE HALL ENTRANCE HALL CLOAKS / LOCKERS OFFICESTUDENT TOILETS STAFF PLANT LIBRARYSTUDENT TOILETS STAFF PLANT

3. S E C T I O N Main pitched roof extended over flat roof to corridor. High level windows to rear of classroom blocked up. Mineral wool Insulation added at ceiling level to existing attic and over existing flat roof Phenolic foam external insulation system applied to all walls, and carried down to top of foundations. External cavity filled with platinum polystyrene bead insulation Corridor wall cavity filled with Foam expanding insulation. Existing floors removed. Rigid polystyrene insulation laid under new concrete floors throughout. Munster Joinery - PassiV Future Proof triple glazed windows with True Window Planitherm 4/20/4/20/4 Argon 90% glazing used throughout.

4. B U I L D I N G F A B R I C M E A S U R E S EcoBead Platinum Cavity Wall Insulation consists of an expanded polystyrene material which is injected in bead form with a binding agent into the cavity walls. The thermal conductivity ’λ. value’ of the EcoBead Platinum Cavity Wall Insulation material may be taken as 0.033 W/mK for the purpose of U value calculations. weber.therm XP (Mesh) External Wall Insulation System, comprising mechanically-fixed phenolic (PHS) boards with a mesh reinforced one-coat render, which is suitable for use on new or existing domestic and non-domestic buildings. The thermal conductivity ’λ. value’ of the Webertherm PHS Phenolic Insulation at thicknesses greater then 45mm is 0.020W/mK EXISTING CAVITY WALL UPGRADE MEASURES EXISTING CLASSROOM GABLE CAVITY WALL UPGRADE MEASURES

5. EXISTING FLOOR UPGRADE MEASURES Existing floors removed. Rigid Kingspan Styrozone H350R polystyrene insulation laid under new concrete floors throughout. The boards achieve a thermal conductivity of 0.031W/mK at thicknesses over 120mm EXISTING PITCHED ROOF UPGRADE MEASURES Two layers ISOVER Metac mineral wool Insulation roll, one laid between existing joists, and one above to give a total thickness of 350mm. Thermal conductivity 0.034W/mK B U I L D I N G F A B R I C M E A S U R E S

6. EXISTING FLAT ROOF TO PITCHED ROOF UPGRADE MEASURES Two layers ISOVER Metac mineral wool Insulation roll, laid over existing flat roof, which has now become an internal element in new pitched roof over corridor. Biofoam 2700sp Injection Foam insulation is a polyurethane foam injected into the cavity in the corridor walls. This results in improved air- tightness to this wall. 90% Closed cell Light Weight and high density. Low Thermal Conductivity 0.032W/mK EXISTING CLASSROOM / CORRIDOR CAVITY WALL UPGRADE MEASURES B U I L D I N G F A B R I C M E A S U R E S WINDOWS AND DOORS

7. E A V E S D E T A L INDICATES AIR-TIGHTNESS INDICATES WIND-TIGHTNESS

8. C I L L / G R O U N D F L O O R J U N C T I O N D E T A I L INDICATES AIR-TIGHTNESS INDICATES WIND-TIGHTNESS

9. C O R R I D O R W A L L D E T A I L ISOVER Comfort Panel 32 A high performance mineral wool insulation panel for use around window heads, and behind service voids. INDICATES AIR-TIGHTNESS

10. U P G R A D E D F L A T R O O F THIS ROOF DETAIL APPLIES TO FLAT ROOF OVER CORRIDOR AND TO BOTH SIDE OFFICE/TOILET BLOCKS. INDICATES AIR-TIGHTNESS INDICATES WIND-TIGHTNESS

11. C A L C U L A T E D L I N E A R T H E R M A L B R I D G E D E T A I L S LTB 1 INSULATED EXTERNAL WALL WITH FLOOR SLAB LTB 2 INSULATED FLAT ROOF/CEILING WITH CORRIDOR WALL 1590 mm 4530 mm 1530 mm 1914 mm

12. P R O P O S E D M V H R 1 no. Aerosilent Centro 1200 MVHR unit situated in new plant room adjacent to re-arranged staff and student toilets. The total building Supply air requirement is1575m³/h, the Aerosilent Centro 1200 can supply up tp 1400m³/h, however it will in reality only need to supply approx 1200m³/h as a second, smaller CWL - 400 - Wolf MVHR unit can supply up to 400m³/h at 83% efficiency, and serves the library and second toilet areas at the other side of the school Extract only to toilets in each cubicle. Air drawn in through transfer grilles in doors from corridor. Extract from office via corridor under door or through transfer grilles. Supply ducts @250 Ø to classrooms in roof space over Hot water, and heating if required, is supplied by a new oil condensing boiler. Heating distribution flow and return pipe work to zoned central heating is 186m in length. The length of DHW distribution pipe-work is 112m with branch pipes to each sink totalling 34m. DHW + DISTRIBUTION HEATING LOAD PHPP heating load sheet indicates that the heating load will be met by the MVHR system However a small radiator will be provided in each area for possible additional heating requirements.

13.  Improvements to external wall fabric through the application of external wall insulation tasking the wall U values up from 1.735W/(m²K) and 1.504W/(m²K), to 0.079W/(m²K) & 0.078W/(m²K)  Floors, both suspended and existing concrete, replaced throughout with new highly insulated concrete floor to give U value of 0.101W/(m²K).  New pitched roof to each side wing, extend existing pitched roof over corridor flat roof.  All windows replaced in their existing locations, with same openings to triple glazed UPVC with overall window U value of 0.07W/(m²K).  Provision of a Mechanical heat recovery ventilation system. System chosen 1 no. Aerosilent Centro 1200 MVHR unit situated in new plant room adjacent to re-arranged staff and student toilets, and a second, smaller, PAUL Novus 300 MVHR unit serves the library and second toilet areas at the other side of the school.Supply air requirement of 1575m³/h. Aerosilent Centro 1200 MVHR unit can supply up to 1400m³/h at 84% efficiency and CWL - 400 - Wolf unit can supply up to 400m³/h at 83% efficiency. PHPP heating load sheet indicates that the heating load will be met by the MVHR system However a small radiator will be provided in each area for possible additional heating requirements.  Air-changes set at 1.0 1/h  Overheating due to solar gain has been handled mainly by adding blinds to windows, giving a reduction factor for temporary shading in summer in shading-s sheet, ventilation running without heat recovery during the summer, and additional summer controlled mechanical ventilation at night.  Motion sensor, and, daylight sensitive lighting controls that turn lights off, have been utilised to reduce lighting energy consumption. Classroom Fittings will T5 (16mm) tubular fluorescent lamps as recommended by the department of education. Corridor lighting should be linear fluorescent and zoned with appropriate local individual light switches and where appropriate daylight detection/absence detection controls. Daylight levels have not been improved upon in this instance as the roof would require too much modification to install sufficient roof-lights Light shelves could be used to bounce light further into rooms to further reduce the lighting loads.  Provision of 10m² of solar panels to provide 41% of DHW requirements  Linear thermal bridges have been addressed in the detailing of insulation layers. 2 specific details have been calculated.  Space heating reduces to 22 kWh/(m²a)  Heating load reduces to 14 kWh/(m²a)  Primary energy reduces to 117 kWh/(m²a) A P P R O A C H T O A C H I E V E E N E R P H I T S T A N D A R D

14. Efficient and accurate distribution of light Deeper penetration of glare-free natural daylight Shelf is easily rotated downward for cleaning, without the use of tools, and is resistant to dust collection. Lightweight construction can attach to virtually any window system Installed in single sections or continuous runs Highly reflective surface directs more light into space Sustainable design contributes to multiple LEED ® credit strategies L I G H T S H E L V E S S O L A R H O T W A T E R Provision of 10m² of flat plate solar collectors on south east facing roof at a pitch of 41° gives a 41% contribution to school hot water requirements.

15. P H P P I M P R O V E M E N T P R O G R E S S I O N C H A R T

16. P H P P O V E R A L L I M P R O V E M E N T SCHOOL UPGRADED PHPP Very little passive solar gains Huge Annual heating demand SCHOOL BASE PHPP CHANGES IN HEATING ENERGY BALANCE BETWEEN BASE AND FINAL PHPP 88% IMPROVEMENT IN VENTILATION LOSSES 75% IMPROVEMENT IN LOSSES FROM WINDOWS 82% IMPROVEMENT IN LOSSES THROUGH GROUND FLOORS 89% IMPROVEMENT IN LOSSES THROUGH ROOF 94% IMPROVEMENT IN ANNUAL HEATING LOAD INTRENAL GAINS REMAIN THE SAME 30% REDUCTION IN PASSIVE SOALAR GAINS