"Other than the maximum pipe length requirements in EA 7.1, no calculations are needed for this credit." change to:"For EA 7.1, determine ceiling height by measuring the floor-to-floor distance.For EA 7.1 part (a-ii), calculate the allowable length for the circulation loop based on the number of stories in the home. Calculate the length of pipe in the installed circulation loop. For EA 7.1 parts (a-iii), (b-iii), and (c-i), calculate the length of installed pipe from the circulation loop, manifold, or water heater to the furthest fixture. Any 3/8" diameter piping should be counted at half the length of 1/2" diameter pipe when calculating maximum branch length; check local code for compliance. For EA 7.1 (c-i) in a multi-story home, the maximum allowable branch length differs for each story. Branches to1st floor fixtures may not exceed 20 feet; branches to 2nd story fixtures may not exceed 20 feet + 1x the story height; branches to 3rd story fixtures may not exceed 20 feet + 2x the story height; etc." For EA 7.3, if a solar water heater is installed, have the installer estimate the percentage of the total annual hot water load that will be met by the solar water heater, taking into consideration system design, climate and estimated consumption patterns.