Got a 2 stage furnace that has never run in low stage. I set the dipswitch to activate 2 stage furnace, I dialed in both gas pressures. I told Kevin if he hates the way it feels I have no problem coming back and setting to single stage, but I figured if he paid for a 2 stage he may just wanna try it out for economy sake. It is a spray foamed pole barn house so I figure the low stage should satisfy the stat just fine.