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Part of the BRE Trust BRE Global Protecting People, Property and the Planet The Macroeconomic Impact of Commercial Fires Part 1 Dr Debbie Smith OBE Director, Fire Sciences and Building Products, BRE Global Ltd

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BRE Global Protecting People, Property and the Planet A UK study into the environmental impact and cost benefit of fire sprinklers in warehouses Acknowledgements; Owen Abbe main technical contributor to environmental impact analysis Jeremy Fraser-Mitchell main technical contributor to cost benefit analysis for this study Corinne Williams project support and stakeholder engagement

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BRE Global Protecting People, Property and the Planet Introduction In response to increasing annual costs of fire, the Business Sprinkler Alliance commissioned a study with the objective to determine whether it is cost effective to install and maintain fire sprinklers in warehouses in England and Wales. The first part of the project was a cradle to site assessment of an average warehouse fire, considering both the environmental impacts and the monetary costs. The second, larger phase of our research, which was the primary focus of the study, looked at a whole-life cost benefit analysis for the installation of sprinklers, for three ranges of warehouse sizes.

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BRE Global Protecting People, Property and the Planet Life cycle stages using BRE Methodology to calculate Ecopoints

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BRE Global Protecting People, Property and the Planet Contents specification for the case study warehouse 50% class II commodity (non-combustible contents in heavy carton) and 50% standard plastic (combustible plastic contents). The content loading was assumed to be 75% of the total warehouse capacity

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BRE Global Protecting People, Property and the Planet Ecopoints results

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BRE Global Protecting People, Property and the Planet Ecopoints results considering fire Environmental impactWithout sprinklers With sprinklers CO 2 released by burning of contents (Ecopoints, partial) 2,8909 CO 2 embodied in replacement contents (Ecopoints, partial) 7,67517 CO 2 embodied in rebuilding, should demolition occur (Ecopoints, partial) 7013 CO 2 equivalent value for water usage (Ecopoints, partial) 373 Total CO 2 released / embodied in rebuild or replacement 11,30331 Water used in fire-fighting (Ecopoints, partial)44623

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BRE Global Protecting People, Property and the Planet Whole life cost benefit analysis Generic warehouse buildings were categorised in three size ranges: small, 0 to 2,000m 2, medium, 2,000m 2 to 10, 000m 2 and large, greater than 10, 000 m 2. The frequency of fires per (building.year) were estimated from the statistics for the number of buildings of a given type, the estimated proportion with sprinklers, and the number of fires observed. Consequences expressed in terms of; Fire and smoke damage Deaths and injuries Carbon dioxide emissions or embodied carbon dioxide Water usage Unemployment

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BRE Global Protecting People, Property and the Planet Results Breakdown of average costs considered Quantity Small warehouse (< 2,000 m 2 ) Medium warehouse (2-10,000 m 2 ) Large warehouse (> 10,000 m 2 ) No sprinkler SprinklerNo sprinklerSprinklerNo sprinkler Sprinkler Cost of total area damaged116,42737,5401,511,28936,6631,861,28437,907 Cost of injuries6581,6922,2171,6742,4481,634 Cost of fatalities6,60217,66523,22817,80825,55117,686 Cost of CO 2 released in fire202202,661202,65920 Cost of CO 2 embodied in replacement 537527,081527,07753 Cost of water used in firefighting5,0173,6098,3763,5795,6663,599 Cost of CO 2 embodied in rebuild10613866864910 Cost of unemployment15,8181,822196,2681,655192,5182,706 Total costs145,36462,4101,751,98361,4572,097,84963,612 (Values quoted in 2010 prices, and based on best estimates of fire and smoke damage costs)

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BRE Global Protecting People, Property and the Planet Results Average whole life costs (warehouse buildings) Quantity Small warehouse (< 2,000 m 2 ) Medium warehouse (2000-10,000 m 2 ) Large warehouse (> 10,000 m 2 ) No sprinkler SprinklerNo sprinklerSprinklerNo sprinkler Sprinkler Total cost of fire21,89516,059845,06522,0933,824,15714,695 Cost of insurance over lifetime32,63016,315139,60469,804723,504361,731 Total cost of sprinklers 66,349 184,551 848,029 Total Whole Life Costs54,52598,722984,669276,4484,547,6611,224,454 (Values quoted in 2010 prices, and based on best estimates of fire and smoke damage costs)

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BRE Global Protecting People, Property and the Planet Conclusions 1 For warehouses larger than 10,000m 2, the average whole life costs for buildings with sprinklers are between 2 and 5 times smaller than the corresponding average costs for buildings without sprinklers. A similar level of cost-effectiveness was found for warehouses between 2,000 and 10,000m 2 in area. Sprinklers were, on average, not cost-effective in warehouses with an area below 2,000 m 2. The lifetime referred to is that of the sprinkler system, which is on average, 45 years.

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BRE Global Protecting People, Property and the Planet Conclusions 2 There is an overall net environmental benefit to installing sprinklers including a reduction in CO 2 emissions from fire, reduced size of fire, reduced quantities of water used to fight fire and resultant embodied CO 2 savings from contents replacement and warehouse rebuild It is estimated that 20% of warehouses between 2,000 and 10,000m 2 in area are fitted with sprinklers. For warehouses above 10,000m 2 in area, the estimated fraction with sprinklers is 67%. In a hypothetical scenario where all warehouses above 2,000m 2 in area are fitted with sprinklers, the study indicates that the annual saving could be between 60m and 210m. Full version of final report available at; http://www.business-sprinkler-alliance.org/wp- content/uploads/downloads/2014/01/BRE-Report.pdf