purchased heat pumps for ASHRAE 90.1

Dear Group, As you know additional requirements from LEED led to purchased heat water coils being substituted for furnis heat coils in some unitary systems. 90.1-2007 therefore had requirements for the hot water pumps only for systems that normaly have hot water, such as 1, 5 and 7. Consider that I am using 90.1-2007, but have purchased heat...as there is no pump requirement, should I 1) use that of 90.1-2010 2) use the proposed case pump power and scale the rated pressure rise acordingly with the baseline auto-sized flowrates and the required motor efficiency. I vote for 2) as I'm using 2007 consistantly. I tested it with the 2010 requirement and the pump power would decrease by about 20%. Kind regards, Jean.