Several of my brewing buddies and wanting to jump to all grain and have asked me if the size of the propane regulator significantly affect the amount of heat supplied by the burner? They are looking at turkey fryers with a regulator at 5 or 10 psi and want to know if using a 15 psi regulator will significantly improve the heat output of the turkey fryer. To be honest I want to know the answer to this question because I don't know.