Hello, We are planning a 5 ton water to water geo system and 2 different geothermal professionals have proposed 2 different loop configurations. I am trying to understand the pros and cons of each, and which will be better. One design uses slinky loops 5000' of 3/4" pipe in 5 trenches. Each trench 3.5' wide, 6' deep, 90' long. 1000' of pipe in each loop. The other design uses horizontal 'racetrack' loops 2400' of 1.25" pipe in one trench 4' wide, 6' deep, 300' long. Lay four pipes in the trench, backfill 2' and pipes return at 4' deep. Seems to me there is more volume of fluid in 2400' of 1.25" than there is in 5000' of 3/4". Therefore the heat pump could receive the same gpm while the fluid is moving slower and spending more time in the ground. But it will take longer to transfer the heat through the larger diameter pipe, and the 1.25" design will be using about 300 sf less ground area. Any advice or help with this decision is much appreciated.