Sebestyen&Williams was hired by us to build our new home. The heating/cooling work was subcontracted to Sertech Heating&Cooling of Portland, In. They were hired by Bruce Sebestyen to install a Bryant geothermal HVAC open loop system with 2 units, one upstairs and one downstairs at a cost of $12, 000. In 2008 both heat/cool units gave out, damaged by hydrogen sulfide in the water. The manufacturer voided the warranty because of improper installation by Sertech Heating & Cooling. Sertech did not test the water first. Both units will have to be replaced. Both the builder and subcontractor will not do anything to fix the problem. Bruce Sebestyen is ultimately responsible for the work of the subcontractor that he hired. The job was not done right and he expects us to replace the units at our own expense. Bruce Sebestyen advertises as being a “Fine Home Builder”. What kind of fine home builder is that??? BUYER BEWARE!!!