“Free Zone” RB-276 is an EPA-approved alternative to R-12, the company says. The refrigerant operates at almost identical pressure-temperature relationships as R-12, has a very low temperature glide, and almost zero fractionation, says the company. Because the refrigerant can be used with mineral oil, conversion from R-12 does not require a system flush or oil change, the company states. Also, the product contains neither butane nor propane.

RMS of Georgia/Spectrum Trading, 108-B Oak St., Roswell, GA 30075; 888-659-2653 or 770-642-0403; 770-642-0787 (fax).