&quot;Diminishing returns&quot; for what?<p>PH is an extremely worthy initiative, but I can&#x27;t help think it&#x27;s ripe for a bit of disruption. The whole certification process adds needless cost to a build&#x2F;retrofit and doesn&#x27;t help with the perception of high performance homes being expensive.<p>There&#x27;s no real reason PH has to be more expensive than anything else. Just that volume housebuilders won&#x27;t be able to pay minimum wages to people they find on the street any more...