Hello forum, I am a new member and this is my first post. I have been reading this site for two years and finally ready to start my project. I will do my best to provide as much info as I can at this time. My wife and I are building our dream home on a farm we have owned for a few years. For reasons of cost, but more importantly our desire to be as self sufficient as possible, we are doing as much of the construction process ourselves. I have been an advocate and student of geothermal for a long time, reading as much as I can. I am committed to using it in my new home. After much reading and conversation, I am hopefully I can install the majority of the system myself ( and with some guidance by those here, hopefully) Our farm is located in central eastern Pennsylvania, Lehigh valley area if anyone is familiar. I have a backhoe on site. Ground temps at 52degrees. We are building a 4200 sqft home, with great focus on energy efficiency (quality insulation, windows, etc). Home will have wood burner backup, but system not accounting for its usage at all. My goal is all electric as I am considering other renewable sources (home hydro, solar) in the future to augment my electric bill. My soil is relatively dry and full of shale. Farm is on a hilltop area and ground is almost all shale. We are planning on a 5 ton two stage unit, based on analysis from a private company, with an auxiliary variable heat strip to supplement. I am planning on a horizontal loop system. It is now the beginning July and I am hoping to install my loops in August, as I will have the time and equipment to do so at that time. House construction will begin in the spring (April 2018). My goal is to have the loops done now, allow for settling etc and be ready to hook into come the spring/ summer next year. Loop Design: Based on my size system, rocky and relatively dry soil, my proposed loop design is 6 individual 800ft slinky loops of 3/4in HDPE. All six loops will start and end inside the basement and connnect to the manifold there. I am not overlapping my slinks. 3 ft wide trench, 6feet deep, one slinky loop of pipe (10 linear ft of pipe) per 3 linear ft of trench. That is the general overall idea. I hope that is enough info. So, to my questions. Basically, I am just nervous about actually pulling the trigger. I was hoping to get the opinions of the experts here before doing anything and getting into trouble. As this time, I am mostly interested in opinions/ thoughts on my loop as that is what is happening now. Questions: 1: am I in good shape with my design? 2: should I consider 1 inch pipe rather than 3/4? 3: I am considering a drip/ soaker tube/ pipe in each trench to increase my thermal conductivity. This would be gravity fed from grey water system from the house with additional rainwater collection system as well. Is this worth the time/ expense? Thank you to any and all who would be so kind to offer any advice. It is greatly appreciated.