I have a Quincy 5 hp,220v., cast iron 2 stage 60 gal.ver. tank,17 cfm .1100.00. It works nicely,would be better if outside the shop tho.Drain tank often ! Had over 3 yrs ,a BIG improvement over my craftsman 5hp oil type 30 gal .single stage I had for many yrs.I would not buy oilless if you plan on doing any work with it .