Realistically it's very likely they grow best in an environment similar to their natural one though, there's not many living things that are more optimized for thriving outside their niche than inside their niche. Plus they mention growing them in ovens in the article.

Still, with some modern insulation and clever heat exchangers it doesn't have to be untenable. They may require more environmental heat than normal to get started, but as long as you're not losing any to the outside it's all energy that will be converted into calories eventually.