A virtual reality environment offers advanced simulation abilities for training purposes to increase interactive learning experience.  The aim of this paper is the investigation and designing of a virtual reality environment to simulate the fire spread inside a room based on a well-known approach called Fire Dynamic Simulator (FDS). FDS achieves a realistic and accurate approach in describing any fire spread, due to its advanced mathematics formulas and models. The visualization of the fire spread in a VR system is more realistic by entering accurate data, which could be provided by the FDS. This virtual reality application could be used for fire extinguishing simulations. Utilizing FDS technical scientific methods, we can borrow and customize them so that we can make a more comprehensive application in Unity in the future to create a full environment with multiple possibilities. This might be supportive for firefighting training and knowledge about how fire evolves. This offers the opportunity to improve firefighting training in an ecofriendly virtual environment with affordable validity, leading in a safe evaluation of fire behavior in various scenarios that would otherwise be very dangerous to examine.