Computationally efficient sensitivity analysis for building ecodesign with many-level categorical input factors | International Journal of Metrology and Quality Engineering (IJMQE)

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Table 2

List of uncertain factors.

Factor	Source	Reference value	LB	UB	Unit
Characterisation factor HFC134a	[44]	1301.3	1190.5	1412.0	kg CO₂-eq
Construction material waste	[45]	5	0	10	%
Environmental background data	[46]	Categorical: Sampling in the available levels			–
Fan energy consumption	[47]	0.475	0.105	0.845	Wh/m³
Lifetime: building	[2,3]	80	40	200	yr.
Lifetime: covering	[45]	40	15	100	yr.
Lifetime: doors	[45]	37	10	80	yr.
Lifetime: hot water tank	[45]	15	8	20	yr.
Lifetime: insulation	[45]	38	20	60	yr.
Lifetime: painting	[45]	16	5	50	yr.
Lifetime: roof tile	[45]	50	15	100	yr.
Lifetime: tiled floor	[45]	50	15	100	yr.
Lifetime: windows	[45]	38	15	60	yr.
Polystyrene: conductivity	[48,49]	0.030	0.027	0.033	W/m/K
Polystyrene extrusion process	–	Categorical: CO₂ or HFC134a			–
Steel rate in concrete	[50]	3	0.2	4.2	–
Thermal bridge: living room	[51]	RT2012	-0.52 * Vref	0 * Vref	W/K
Transp. distance of new materials to building site	[52,53]	75	0	200	km
Transp. distance of waste materials from building to end-of-life site	[52,53]	25	0	100	km
Variability of Climate	[30]	Categorical: Sampling in the available levels			–
Variability of Occupancy	[31]	Categorical: Sampling in the available levels			–
Ventilation double flow heat exchanger efficiency	[49]	90.0	85.5	92	%
Ventilation rate in the crawl space	[28]	1	0.5	1.5	vol/h
Water network efficiency	[54]	74	37	100	%

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