The RadonAway GX4 brings sleek lines and high performance to high suction fans. Quieter than previous high suction fans we’ve tested, the GX4 has more suction than nearly every fan in our line. See the performance curves below. This fan fits a real need between mid range and the highest suction fans on market. With the reliable RadonAway name and their incredible ProSeries EverWhite housing, you get high suction in a great looking package.