.

Just found this

R32

Flammability limits in air (STP conditions) : 14-31 vol%

so you need far more concentrations of the stuff before it will burn,
compared to butane or propane which are between 2 - 10%

kg/m3 0.306 A room 5 x 5 x 2 (50 m3) would take 15kgs before it burnt
So it is a lot safer than the refrigerant we currently use.

Rob

.