A:Answer Hi Greens,
It uses R600a. Isobutane, also known as i-butane, 2-methylpropane or methylpropane. It is an isomer of butane. Isobutane is a colorless, odorless gas. Material gas is much safer that Freon. It’s becoming increasingly popular due to its low Global Warming Potential.
Renee,
Insignia Support