Building Performance Evaluation Matt Harrison - White Design with - PowerPoint PPT Presentation

Building Performance Evaluation Matt Harrison - White Design with Piers Sadler Consulting Oakham C of E Primary School Rutland 6 month design construction and handover review Breeam excellent EPC B (26) Rogiet Primary School Monmouthshire as above plus 2 year monitoring highest BREEAM rating for school at the time 10 x 10

- obtain information - uncover the issues - share and discuss - - recommend - monitor, resolve, remediate, (ROGIET) Contents 10 x 10

2FE school SEN facility hydrotherapy pool Oakham 10 x 10

1FE school Early years Community facility Rogiet 10 x 10

Interviews with key design team members - Design process - what changed? - Handover process - Operation and maintenance BUS survey (Arup methodology) - Building in use Design and systems audit - Does the building operate as designed/predicted? Obtain information

Interviews held with - Joan Gibson } - Jim French Transcripts - Richard Lambert and notes fed - Terry Downes into report - T Clarke Key points for further investigation: - Training - BMS/Operation of windows - Maintenance costs Interviews

- BUS results show that this is one of “The Value Engineering decision was to the major causes for discomfort during link the Window master hardware to the rainy weather Trend BMS. The Trend system opens and - 13 comments about stuffy rooms closes the windows based on internal when it is raining temperature and restricts opening if it is raining or too windy. This less sophisticated system can cause problems if it is warm or stuffy inside when it is raining.” - Positive in terms of feeling that “nothing was taken out” - Storage issue in BUS (average score, “We did value engineering very subtly by but 21 comments on insufficient shrinking the building down. For example, storage) rather than removing a room we subtly changed floor sizes etc...” - Air permeability “The Sarpa aluminum windows we have - U value? ended up with represented a massive saving compared to Velfac, but they will not reach - Effect on operation of actuators? the air permeability and performance of Velfac. I feel Velfac should have been on Wish List” Value engineering 10 x 10

- Twin wall system is a key to successful performance of the building ““The twin wall system was almost lost - Loss of this system would have had because of cost, only saved thanks to a low huge consequence on building fabric quote late in the day”” performance - Further investigation in Design “Removal of the solar thermal array was also Investigaton will draw conclusions discussed at the VE stage, but eventually this here was kept in” - Further investigation in Design “Similarly, the use of heat recovery from the Investigaton will draw conclusions extract fans providing frost protection for the kitchen AHU intake was discussed at length, here but this feature was maintained.” VE - near misses 10 x 10

- Overall comments about the “The Support package is excellent so far. The Willmott Dixon back up system I would praise handover process were positive very highly, it is excellent” - Training needs to be timely and “when we were asked to take over the adequate building we were told the building was ready - - Expectations also need to be met - we had supposedly had training on the building full knowledge of systems may not be systems operation - it wasn’t adequate and it needed by all team members was much too early.” - O&M Manual and Building User Guide - ensure there is a user-friendly “Lots of technical data about specific bits of kit, but not much overall guidance e.g. where guide available the bit of kit is in the building Handover process 10 x 10

General feeling is positive + All of the overall variables were above average Uncover the issues 10 x 10

First focus is on those questions with below average results: - Temperature is too hot and variable - There is too much natural light - Air during hot weather is too dry Comments on forms help e.g. - On hot rainy days windows don’t open But - No space provided on the BUS form to comment on “air” Uncover the issues 10 x 10

- Enables wider set of views to be heard - Answers and comments on 54 questions enables overall picture to be built up - Allows comparison with 80 others on database - 95% of school staff reached Building User Survey

Oakham BPE - the main learning points 1. Buffer zones design and education requirements 2. Natural ventilation - when a simple system becomes a complex system 3. Lifecycle costing and Renewable energy benefits - remembering build in not bolt on - Insulation vs Renewable systems 4. Processes and ownership for understanding the whole building (Soft Landings, ownership for M+E coordination in Design and Build projects) 10 x 10

External Buffer Zones - cloakrooms - Act as a buffer between outdoors and indoors - Key part of natural ventilation and airtightness strategy - On our visit (warm but rainy day) at least 3 classrooms had propped doors open for ventilation It’s difficult to let the children The flow of children through I like the two doors for cloakroom out as the doors are very heavy cloakrooms to the outside space area for foundation stage, so they - tend to leave them propped works really well can come in in winter and keep open during playtime /end of classroom clean. the day Design of buffer zones

Use of buffer zones to reduce Environmental brief heat loss from classrooms £700/m 2 As a simple, tempered space for occasional shelter Kingsmead Cheshire ➽ No As external storage, a cloakroom or toilet Mabel Prichard ➽ No Oxfordshire As occasional multi-use space - e.g. for wet playtimes Dewstow ➽ No Monmouthshire The specification for the room is over and above that for lobby room, so falls within BB guidelines and is treated as part of overall building footprint Oakham As daily-use additional Rutland teaching space Education brief £2000/m 2 Design of buffer zones 10 x 10

Poor combination underfloor heating and direct access. Use group space as lobby in winter for younger children? Plan first group space activity to not require significant setting up. Recommendations

Oakham section Rooflight - BMS control Windows -BMS control -Fixed -Manual Classroom Out In • High level window and rooflight automated to provide cross ventilation • Manual low level windows for additional ventilation in hot weather • Windowmaster hardware with Trend software / controls - allows link to heating system Ensure clarity in who takes ownership for understanding the interface between, weather systems, controls, actuators and window system. Consider vertical opening windows or more sensitive controls where possible to avoid rain sensors closing windows when high level ventilation still needed. Natural ventilation 10 x 10

rooflights changed from 2 to one cloakroom space opened to rest of classroom lux levels 350-500 within BB guidelines 300-500 Lighting 10 x 10

Other Issues Opportunities Colour on internal face - paint inside face of wall of wall - reposition coloured canopies canopy addition to north - make the rooflight blind open facing classrooms position the default colour on the canopy e.g implement whiteboard screen design monitor, screen saver Lighting 10 x 10

Recommendations

Recommendations

Lifecycle costing and Renewable energy benefits – Insulation vs Renewable systems Maintenance costs Design and Build BREEAM Local Authority Funding processes Capital budgets and Maintenance budgets Political will! ROGIET EXAMPLE of wind turbine and frost protection Lifecycle Costing

Not Completed Bespoke process for job Carried out BSRIA Process Q. Who else should champion Soft Landings Could have prevented Nat. vent coordination issues Soft Landings

Bicester Eco School Zero Carbon Brief regulated and unregulated emissions. Achievement of regulated performance contractual requirement Soft landings and performance review process being built in throughout - key gateway stages. Natural ventilation with high performance fabric and district heating with PVs. Applying the learning

Reaction and Discussion BPE Who takes ownership for performance? How does design and build factor in these processes? Need to consider whole life carbon emissions not just energy cost? Who pays for the process? Discussion