Hello. I'm a home owner thinking about installing geothermal. There's a company in my area that specializes in geo but they are not IGSHPA certified. They are a Waterfurnace Geo pro master dealer though. Should I avoid a company that isn't certified? Obviously if they are geo pro master dealer they install a lot of systems. I just not sure why you wouldn't get certified if it's your specialty. I called them and they said their well driller is certified in well drilling.