Description of FPEtool FPEtool is the descendent of the fire form program, it contain a computerized selection of relatively simple engineering equation and models useful in estimating the potential fire. CORRIDOR is a procedure that predicts the characteristics of a moving smoke wave; the procedure works best in spaces with large length to width ratios that receive smoke flows with minimal entrainment. 3rd ROOM is a procedure that predicts smoke conditions developing in a room and the subsequent reduction in human viability resulting from exposure to such conditions. The last 3 modules may be used sequentially. Fire simulator predicts fire generated effects within the room of origin. Smoke outflow from fire simulator may be used as smoke inflow to the corridor module. Smoke conditions predicted with the corridor module can be used to define conditions on the `fire-side'' of the door to the 3rd room. A comparison of FPETool: is prepared for data with three different full scale experiment in a compartment fire. The studies will present the difference of the room geometry, thermal physical properties, ventilation factors, fuels, fire geometry and fire growth. Depending on the experimental data presented, comparisons were made for the following parameters, ceiling jet velocity, ceiling jet temperature, upper layer temperature, upper layer depth, detector link temperature, time to sprinkler activation, and heat release rate at time of sprinkler activation. Results for predicted sprinkler activation times ranged from 74% to 159% of measured times depending on the RTI chosen for the sprinkler, characteristics of the fire, and fire growth rate. All predicted ceiling jet velocities differed by approximately a factor of two from measured values. Generally, upper layer depth predictions were good only for situations where there was not a large vent from the room. For the full scale experiment conducted in a large room with a high ceiling, predicted link and ceiling jet temperatures had better agreement with measured values if consideration was given to the time required for the transport of the products of combustion from the fire to the link. For experiments which had varying fire growth rates predictions for upper layer temperature increase were better for experiments with the slower fire growth rates. Description of FPEtool FPEtool is the descendent of the fire form program, it contain a computerized selection of relatively simple engineering equation and models useful in estimating the potential fire hazard in buildings. The calculation in FPEtool is based on established engineering relationship. The FPEtool package addresses problem related to fire development in buildings and the resulting conditions and response of fire protection system. The subject covered include smoke filling in a room, sprinkler, detector activation, smoke flow through small openings, temperature and pressure developed by fires, flash over and fire severity prediction, fire propagation and simple egress estimation. The largest element in FPEtool is a zone fire model called fire simulator. Comparison with models Persons just learning about these calculation methods often wonder how these tools differ from the growing number of computer fire models appearing on the scene. An appropriate distinction is that the simple tools generally give steady- or quasi-steady state solutions to time dependent problems and predict a single parameter (e.g., layer temperature, filling time, doorway flow, radiation at a point). Models give time varying results of several parameters which are inter-dependent. Most (e.g. HARVARDV) apply a quasi-steady approximation to do so fast solves the differential equations, so is fully time-dependent). With the tools, the user may need to perform calculations and thread results together to obtain a prediction for the scenario under study. This interaction is an important distinction since fire can be a highly interactive process. In some circumstances such as early in a room fire while there is only a single item burning and little enhancement of the burning rate by radiation feedback from the upper layer, the model prediction should approach the steady-state solutions produced by the some of the equations in fire form. However, later, as radiation from the upper layer and room surfaces and lowered oxygen concentrations alter burning rates, appropriately designed models should maintain their predictive accuracy while the steady-state equations become invalid.