1TimeMoM,
I'm a noob but I think people thought you just got your corn. Do you have proper thermometers to make sure your corn is not too cold? I don't think it matters what temperature your house is as long as both sides of his viv are at good temperatures. I'm not enough of an expert to tell you what optimum is (the folks here are though!) but he doesn't live in the house, he lives in his viv, and running heat tape is ~cheap~. PM me, OK?