Click here for fan comparison guide: CLICK HERE FOR RADON TEST KITSRadonAway Model XP201 4" Radon Fan. This quiet, powerful fan is ideal for most active subslab radon mitigation systems. This fan has slightly higher suction at higher levels of static pressure than the XP151. 70 CFM at 1" W.C. Static Pressure RadonAway's XP201 is a reliable, effective radon fan suitable for most mitigation jobs. The unique motor and impeller design of RadonAway's XP radon fans make them the most durable general purpose radon mitigation fan on the market. Note: Choice of fan model is dependent on building characteristics and should be made by a radon professional. Features: Five-year limited warranty Compact size - only 8.5" in diameter Quiet and attractive Rated for commercial use Thermally protected ETL Listed - for indoor or outdoor use Made in the USA Specifications: Power Consumption - 45-66 Watts CFM at 0" W.C. - 125 CFM at 1" W.C. - 70 Maximinum Recommended Operating Pressure - 1.9" W.C. Weight - 6 lbs Inlet / Outlet - 4.5" OD for easy coupling to Schedule 40 PVC Size - 9.5" H X 8.5" X 8.5" Normal operating temperature range: -20 - 120 degrees F. Maximum inlet air temperature: 80 degrees F. Continuous Duty Class B Insulation 3000 RPM Thermally protected Rated for indoor or outdoor use RADON FAN COMPARISON TABLE: Model Watts Max Pressure Duct Dia .5 1 1.5 2.0 2.5 3.0 3.5 4.0 Fantech HP2133 14-20 .84 4" 60 0 0 0 0 0 0 0 Fantech HP2190 60-95 1.93 4" 138 81 35 0 0 0 0 0 Fantech HP190 60-85 2.01 4.5" 123 89 45 0 0 0 0 0 Fantech HP220 85-152 2.46 6" 260 193 58 15 0 0 0 0 Fantech HP190SL 140 2.2 4" 133 103 76 27 0 0 0 0 RadonAway GP201 40-60 2.0 3" 0 82 58 5 0 0 0 0 RadonAway GP301 55-90 2.6 3" 0 92 77 45 10 0 0 0 RadonAway GP501 70-140 4.2 3" 0 95 87 80 70 57 30 5 RadonAway RP145 37-71 2.0 4" 132 94 55 11 0 0 0 0 RadonAWay XP151 45-60 1.3 4" 140 78 10 0 0 0 0 0 RadonAway RP265 86-140 2.5 6" 260 207 139 57 0 0 0 0 RadonAway XP201 45-66 1.9 4" 110 74 38 20 0 0 0 0 Suncourt TF104W 40-60 1.5 4" 145 90 35 0 0 0 0 0 RadonAway RP140 14-20 .8 4" 68 0 0 0 0 0 0 0 RadonAway XR261 65-105 1.8 6" 165 75 30 0 0 0 0 0 RadonAway GP500 70-130 4.3 3" 0 88 80 74 65 54 28 14 Static Pressure - inches of water