So how exactly has this helped him or the economy?
In five years, due to the smaller amount of energy he is now using, he saves up the amount of money he spent upgrading, and can now buy his new oven and hire more employees. In another five years, he now has a bonus pile of cash which he can play with, which he wouldn't have had without lower energy costs.
Why do you replace your single pane windows with double pane? Why do you add insulation to your home? Why do you replace your 80's refrigerator with a new one? Why switch from incandescent to florescent light bulbs? Why buy a lower polluting, more gas efficient car? Why purchase reusable grocery sacks? Why purchase a bicycle?
In the 70's, we had an energy crisis. As a result, there was a massive shift in the American economy to be energy efficient. Miles per gallon in cars doubled. Refrigerators quadrupled efficiency. New houses and repairs/upgrades started requiring energy-saving features, like insulation. Energy Star ratings are mandatory for many appliances. While this is an up-front cost that requires retooling factories and increasing prices, the long term benefits and money-saving effects outweigh the initial cost.
The reason people fight this is because people do not look at the life-cycle cost of a product. They see an item at a low cost and but it in preference to one that is twice the cost but will last five times longer, or buy one that has a low cost, but a high maintenance cost (printer ink, anyone?). This is not the broken-window fallacy, as you are not replacing the window, you are upgrading it to something that has benefits beyond the original.