Novec is a 3M product that was developed to replace Halon as a gas based fire suppression system. Novec is harmless to sensitive electronic devices and leaves no residue once it has evaporated. It works as a super coolant by taking the heat out of the fire thus extinguishing it. Since Novec is a gas based system, it offers excellent coverage and fire knock down capabilities in a small package. The expense related to the Novec is due to the cost of the Novec itself but in cars with expensive and sensitive electronics, Novec is superior to AFFF due to its harmless nature for circuit boards and wiring.