Units we typically use  listed below,

Units	Airwatts	CFM	Water Lift	Amps	Capacity	Sound dB	Brand of MD units.
M92   240vac	943	191	137	13.7	8	75
S5       240vac	866	191	136.4	13.7	12	62
S2       240vac	722	208	95	9.3	12	62
M85b 110vac	650	130	143	11.7	8	72
S2       110vac	554	184	84	16	12	62
M85      110vac	525	110	123	11.7	8	70
M80     110vac	508	106	120.4	11.6	6	66
M60 RV's	453	119.5	108	10.2	1	72