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Table 5 Risk matrices for flashover propensity (x), total heat release (y), and smoke toxicity potency hazard (z). VL = very low risk, L = low risk, M = intermediate risk, and H = high risk.

From: Moisture Content, Ignitability, and Fire Risk of Vegetation in Vertical Greenery Systems

Hedera helix Peperomia obtusifolia Aglaonema commutatum
(a) Flashover propensity ( x )
MC (%) Radiative heat flux (kW m−2) MC (%) Radiative heat flux (kW m−2) MC (%) Radiative heat flux (kW m−2)
20 35 50 60 20 35 50 60 20 35 50 60
51 to 350 L L L L 201 to 1400 L L L L 351 to 1200 L L L L
26 to 50 L M M H 51 to 200 L L L L 151 to 350 L L M H
14 to 25 M M H H 26 to 50 M M H H 29 to 150 M M H H
11 to 13 M H H H 22 to 25 M H H H  
(b) Total heat release ( y )
MC (%) Radiative heat flux (kW m−2) MC (%) Radiative heat flux (kW m−2) MC (%) Radiative heat flux (kW m−2)
20 35 50 60 20 35 50 60 20 35 50 60
250 to 350 VL L L L 1250 to 1400 VL VL L L 800 to 200 VL VL L L
11 to 250 L L L L 700 to 1250 VL L L L 650 to 800 VL L L L
  22 to 700 L L L L 29 to 650 L L L L
(c) Smoke toxicity potency hazard ( z )
MC (%) Radiative heat flux (kW m−2) MC (%) Radiative heat flux (kW m−2) MC (%) Radiative heat flux (kW m−2)
20 35 50 60 20 35 50 60 20 35 50 60
11 to 350 L L L L 22 to 1400 L L L L 29 to 1200 L L L L