Retrofitting existing homes to net zero or getting them on the path to zero is as important as building new zero energy homes. This TED Talk explains why. More and more builders are showing that it is feasible to retrofit an older home to zero or close to zero. Retrofits provide the construction industry with business during economic downturns, improve the indoor health and comfort of your customers, increase the value of their homes, create jobs by employing a wide range of workers, and help reduce carbon emissions.