The Pons / Fleischmann claims about their "cold fusion" experiment had nothing to do with aneutronic fusion. In fact, the definitive debunking of their claims consisted in the failure of other labs, and of P & F themselves, to detect fusion byproducts, including the expected neutrons: http://partners.nytimes.com/library/national/science/050399s...
There is no excess heat, it's measurement error caused by miscalculating how much hydrogen recombines in the cell.
If you build a calorimeter that recombines all hydrogen you find no excess (but it's really hard to do accurately).