I was reminded recently of how a salesman's focus can be projected onto a geo shopper. A potential client asked the other day what kind of loops and how many feet I would install on his project. Interestingly the loop question was asked of me while I was measuring for my load calculations. I could only reply "we use slinkies and I don't know what size you need yet, because I don't know your heat loss". The same client informed me that his duct work was "not code" (because the duct work wasn't reduced as it moved further from the furnace) and wanted to know if I intended to remedy the situation. I explained that while the duct work wasn't ideal, it was not necessarily contrary to code (it's referred to as an extended plenum). Further we have great success with smoothing out airflow disparities with ECM blowers and wouldn't it make sense to try it as it is versus top loading the expense of replacing his ducts? After all it is never too late to spend more money. What this really said to me was that a salesperson met with this person before me and emphasized what he (the salesman) wanted the shopper to focus on. Educating a customer is part of any sales presentation and focus on minutia or inconsequential things often gives a potential client a feeling that this (and only this) person pays careful attention to details that nobody else noticed. That this salesperson already knew which size loops to use (before load calculations) also gave the impression that he had more on the ball (though it is impossible to be sure of loop sizing without load calculations or soil evaluation). I once had a customer ask me what my desuperheater looked liked. Comfounded I googled pictures of coaxial heat exchangers and tried to get the best illustration I could. When I returned and explained a desuperheater isn't much to look at, he produced an installation instruction illustration of 2 tanks and process pipe and explained that's the desuperheater he wanted. Again a salesman's careful attention to detail. Again a potential client that figured I was behind the 8 ball because I didn't know what a desuperheater looked like. Hogwash. Client one did not ask me for references. The company I believe focused on duct work has been at "this geo thing" about 3 years now. They did not suggest infiltration testing and airsealing of his modular home, they suggested a zone system and promised to maintain 70* (down to negative whatever) would be reached in all zones......in other words they promised the unit wouldn't shut off until the thermostat was satisfied......and they put it in writing....... Really? Well it should. Shouldn't it? One can attack a heat load from either side, if you attack it as a building envelope issue the results are more even temperatures from room to room and floor to floor as well as smaller (less expensive) heat pumps. Often the expense of additional insulation and airsealing is more than off-set by savings on the heat plant. For those who haven't heard my mantra before, get the best geo company and you don't have to worry about anything else. So if you ask me: What's the best brand of heat pump? Well it's what ever the best geo company in your area sells. Or if you ask me: What's the best loop system? Well it's what ever the best geo company in your area sells. You get the idea...... What have you guys run into that you've had to untangle?