Passivhaus Pool and Leisure Centre for Exeter City Council
PASSIVHAUS POOL MARK THOMAS AFLS+P ARCHITECTS TOMAS GARTNER GALE & SNOWDEN ARCHITECTS
What’s this about?
The Exeter Active project - an overview 1. The project team 2. Leisure Centre design 3. Project background 4. The Client’s Brief 5. The business case for Passivhaus pools 6. The Passivhaus pool concept
THE TEAM
Client
Technical advisers:
Design Team
Passivhaus Institute Building Biology Institute IBN Exeter University
Westminster Lodge, St Albans
Redcar and Cleveland Leisure and Community Heart
The Peak, Stirling
National Aquatic Centre, Dublin
Swiss Cottage Northolt Leisure Centre
Swiss Cottage
The Peak, Stirling
Basildon Sports Hub
PASSIVHAUS IN EXETER Exeter City Council’s has been a strong supporter of Passivhaus In 2010 the council completed their first multi-residential Passivhaus scheme Since then all Exeter City’s new build residential projects have been developed to Passivhaus standard including terraced houses, flats and a care home (currently at design stage)
WHERE IT STARTED Journey began in 2010 TSB ‘Design 4 Future Climate’ programme This study also helped to inform the client’s performance criteria for: - Energy/water saving - Healthy building - Future climate
Passivhaus Pools - Looking Abroad In 2011 two Passivhaus swimming pools opened in Germany: the Lippe Bad (Luenen) and the Bambados (Bamberg) Both were developed as pilot projects with assistance from the PHI Both were monitored by the PHI following completion and confirmed the predicted energy savings are achievable
Lippe Bad - Luenen
Detailed reports on the design, construction and post completion monitoring are available from the PHI
Bambados - Bamberg
What’s special about Pool buildings? High energy and water use Range of different temperature zones in one building High temperature levels (32 C) means pools need to be heated all year High humidity and chemicals create challenging environment for materials and building fabric
Lippe Bad - Luenen
Bambados - Bamberg
TSB Study - Findings
Cumulative Costs for Swimming Pool Building, Built to 2010 Building Regulation Requirements £7,000,000.00 £6,000,000.00 £5,000,000.00 £4,000,000.00 £3,000,000.00 £2,000,000.00 £1,000,000.00
Cumulative costs for swimming pool building, built to 2010 Building Regulation requirements, for heating, lighting, hot water and additional future investments required to maintain adequate comfort conditions under future weather scenarios over the lifetime of the building. All costs have been discounted at 5% to represent present value. A conservative annual increase in fuel costs of 4% has been allowed for and a reduction of heating demand of 30% from 2050 to 2080 has been included.
2050
2048
2046
2044
2042
2040
2038
2036
2034
2032
2030
2028
2026
2024
2022
2020
2018
2016
2014
2012
2010
£0.00
TSB Study - Findings
Cumulative Costs for Climate Ready, Passivhaus Swimming Pool Building £7,000,000.00 £6,000,000.00 £5,000,000.00 £4,000,000.00 £3,000,000.00 £2,000,000.00 £1,000,000.00 2050
Cumulative costs for swimming pool building, built to Passivhaus standard, for heating, lighting, hot water and additional future investments required to maintain adequate comfort conditions under future weather scenarios over the lifetime of the building. All costs have been discounted at 5% to represent present value. A conservative annual increase in fuel costs of 4% has been allowed for and a reduction of heating demand of 30% from 2050 to 2080 has been included.
2048
2046
2044
2042
2040
2038
2036
2034
2032
2030
2028
2026
2024
2022
2020
2018
2016
2014
2012
2010
£0.00
TSB Study - Findings
Comparison of Cumulative Costs for a Standard Pool (Green) Building and the Passivhaus Pool (Blue) Gale & Snowden Design vs Standard Pool Payback after 10 years
£7,000,000.00 £6,000,000.00 £5,000,000.00 £4,000,000.00 £3,000,000.00 £2,000,000.00 £1,000,000.00
2050
2048
Payback period 10 years
2046
2044
2042
2040
2038
2036
2034
2032
2030
2028
2026
2024
2022
2020
2018
2016
2014
2012
2010
£0.00
60% reduced energy demand
Exeter City Environmental Factors Brief
Healthy building
Test to SBM 2015 For air, water quality and radiation
Energy/Water
Total energy target – 70% Water saving – 50%
2080 Climate Ready Thermal comfort Changes in rainfall Increased storm severity
The Passivhaus Pool Concept
- Higher surface temperatures - Minimum thermal bridging avoiding condensation risk - Increased thermal comfort
Total Energy Demand
A Passivhaus building envelope will significantly reduce heating energy losses in pool buildings and results in the 100% following benefits:
0% UK Pool
PH Pool
The Passivhaus Pool Concept But these are just the starting point to open up further energy saving opportunities and benefits: Higher relative humidity possible throughout the year (~64%)
-
This will reduce evaporation rates from pool water and reduce required ventilation rates (ventilation rate of 11.5 ac/h with no re-circulation)
-
More economic ventilation/ducting (eg glazed façade elements don’t need to be ventilated to protect from condensation.)
-
Reduced electrical energy demand for ventilation
Total Energy Demand
-
100%
0% UK Pool
PH Pool
The Passivhaus Pool Concept Key elements of the Passivhaus pool concept include: 1. High performance Passivhaus building fabric 2. High performance windows and doors 3. High levels of airtightness (air permeability <0.6) 4. Compact building form 5. Optimum solar orientation ~40% south facing glazing for wet areas to maximise solar gains 6. Highly efficient ventilation heat recovery 7. Internal zoning 8. Increased relative humidity 9. Reduced ventilation rates with no re-circulation 10. Low chlorine/chemical filtration
The Bigger Picture
Revenue Projections Average UK Pool and Fitness Centre £100,000.00
100%
£90,000.00 £80,000.00 £70,000.00
Creche
Marketing
Retail / F&B
Energy/Water
Swimming
Retail / F&B
£60,000.00
Maintenance
£50,000.00 £40,000.00 £30,000.00
Fitness/Gym Staff
£20,000.00 £10,000.00
0% £0.00
income
expenses
income
expenses
The Bigger Picture
Revenue Projections Average UK Pool and Fitness Centre £100,000.00
100%
Creche
£90,000.00
Marketing
Retail / F&B
£80,000.00
Energy/Water
Swimming
£70,000.00
Retail / F&B
£60,000.00
Maintenance
£50,000.00 £40,000.00
Fitness/Gym
£30,000.00
Staff
£20,000.00 £10,000.00
0% £0.00
income
expenses
income
expenses
The Bigger Picture
Revenue Projections Average UK Leisure Centre vs Passivhaus Leisure Centre £100,000.00
100%
£90,000.00 £80,000.00 £70,000.00
Creche
Marketing
Retail / F&B
Energy/Water
Swimming
Retail / F&B
£60,000.00
£30,000.00
15% reduced running costs
Retail / F&B
Energy/Water Retail / F&B
Swimming
Maintenance
£50,000.00 £40,000.00
Creche
Fitness/Gym
Maintenance
Fitness/Gym Staff
£20,000.00
Staff
£10,000.00
0% £0.00
income
expenses
income
expenses
Thank You !