Heat Values for Some Fire Behavior Fuel Models

The following table presents values of heat per unit area for some of the original 13 fire behavior fuel models (Rothermel, 1991).

Heat per unit area for some of the 13 original fire behavior fuel models.

Fuel Model	Additional 1000-h fuel tons/acre	Heat per Unit Area
		Btu/ft2	kJ/m2
FM 8 - Closed timber litter		580	6,592
FM 2 - Timber (grass and understory)		760	8,638
FM 9 - Hardwood litter		1,050	11,934
FM 9 - Hardwood litter	30	1,325	15,059
FM 10 - Timber (litter and understory)		1,325	15,059
FM 10 - Timber (litter and understory)	30	1,570	17844
FM 12 - Medium logging slash		3430	38,983