Alot of my side work consists of just that, upgrading and updating houses with newer better insulation, windows, appliances, low flush toilets, led lighting etc. Our Hydro companies gives rebates and insentives for that aswell as tax breaks. There is nothing wrong with updating your house with more energy efficient cozier products. We also have very strict guidlines, regulations and inspections as to products we can use so we dont have fires like the on in UK had that Red has mentioned.