Manual J - Number of bores and "Expected" EWT I have a question for the techies on the forum and hope I can narrow down an option soon to correct my loop problems. I have a 4 TON WF Envision system. I have two options on the table as follows: Option 1 Add another parallel bore at 225 feet that will bring the total bore depth to 675. This option would require flushing the Environol out of the system and replacing it with Methanol diluted at 20% to ensure we have proper Turbulence (Re #) in the loops. Total number of cicuits 3. Option 2 (Optimal solution) Connect two existing bores at 225 in series and add a new bore at a depth of 450 in parallel. Total number of circuits 2. Based on the analysis we have done we feel the existing pump module should be able to handle the additional load (Geolink Flow Center with two Grundfos Type UP26-99 pumps). This option gets me past the industry standard of 200 feet of bore depth per ton of equipment. This option we believe will also yield the highest EWT. I also did my Manual J Calcs using HVAC Homeowner 4.0 and I found out that at 4 Tons the system was sized properly. This is what we have: Design conditions 0 F (outside) : The total heat loss is 52,988 BTUH Design conditions 10 F (outside) : The total heat loss is 45,421 BTUH Design conditions 20 F (outside) : The total heat loss is 36,270 BTUH Design conditions 30 F (outside) : The total heat loss is [SIZE=2][B][FONT=Arial][SIZE=2]29,023 [/size][/FONT][/b][/SIZE]BTUH I am also looking at the WF manual p. 39 & 40 for ND049 ECM Low speed (Stage 1) and ECM High speed (Stage 2) and trying to tie all this with the Manual J I did and determine what the best course of action would be Option 1 or Option 2....is there a way to anticipate with some certainty what the EWT would be with these options? Obviously Option 2 would allow me to run on Stage 1 most of the time and would yield the higher electricity savings. I am guessing Option 1 would yield an EWT in the mid 30's to low 40's but this is just a guess....Option 1 potential cost: around 5K....option 2 potential cost...around 10K....I am hoping some of the techies can help me sort this out...I am trying to find the right balance between "acceptable EWT" temps, higher % of Stage 1 run time and cost to get to a final decision on this.... I would be happier with Option 2 (for the high EWT's) but I guess I need some good reasons as to why Option 1 may be ok too....this is tough for sure!!!