Heating technology doesn’t stand still. It is constantly advancing, and that’s why modern gas furnaces are more energy efficient than the furnaces of 30, 20, or even 10 years in the past. But simply saying that “technology got better” isn’t really saying that much. What exactly makes the new furnace so efficient?
And New Furnaces Are Indeed Much More Efficient
Before we get into why furnaces are more efficient, let’s look at exactly how much more efficient they are today than in the past.