Stricter energy codes provide for lower energy use and improved occupant comfort and health.  Energy is not and will not be getting cheaper.  I have performed scores of energy audits, most of these are driven by high energy use and the associated high cost.  We also hear many comfort complaints due to poor duct design and issues with the insulation and thermal bypasses.   I have audited both new and existing homes in over a dozen counties across Virginia and my experience has shown that inspectors were not able to identify thermal bypass issues, shell and duct leaks or improper insulation installs all of which end up causing higher energy use and comfort issues.